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Journal articles on the topic 'Naphthalene'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Halton, Brian, Carissa S. Jones, Peter T. Northcote, and Roland Boese. "Studies in the Cycloproparene Series: Formation of a New Dimer of 1H-Cyclopropa[b]naphthalene." Australian Journal of Chemistry 52, no. 4 (1999): 285. http://dx.doi.org/10.1071/c98179.

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1-(Trimethylsilyl)-1H-cyclopropa[b]naphthalene (10) and its 1-methyl derivative (11) have been isolated as pure compounds from use of a lipophilic size exclusion gel. Acylation of the 1H-cyclopropa[b]naphthalenyl anion (2) is effected with N,N -dimethyl-benzamide and -acetamide to give (5) and (6), respectively. Analogous reactions with the 1-(trimethylsilyl)-1H-cyclopropa[b]naphthalenyl anion (9) do not yield the 1-acyl-1-(trimethylsilyl)-1H-cyclopropa[b]naphthalenes (12) and (13); instead the novel 6-methyl- 7H-dibenzo[b,g]fluorene (15) results from attempted acetylation. Compound (15), a fo

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2

Hernández-Téllez, Guadalupe, Gloria E. Moreno, Sylvain Bernès, et al. "Crystal structures of ten enantiopure Schiff bases bearing a naphthyl group." Acta Crystallographica Section E Crystallographic Communications 72, no. 4 (2016): 583–89. http://dx.doi.org/10.1107/s2056989016004692.

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Using a general solvent-free procedure for the synthesis of chiral Schiff bases, the following compounds were synthesized and their crystal structures determined: (S)-(+)-2-{[(1-phenylethyl)imino]methyl}naphthalene, C19H17N, (1), (S)-(+)-2-({[(4-methylphenyl)ethyl]imino}methyl)naphthalene, C20H19N, (2), (R)-(−)-2-({[(4-methoxylphenyl)ethyl]imino}methyl)naphthalene, C20H19NO, (3), (R)-(−)-2-({[(4-fluorophenyl)ethyl]imino}methyl)naphthalene, C19H16FN, (4), (S)-(+)-2-({[(4-chlorophenyl)ethyl]imino}methyl)naphthalene, C19H16ClN, (5), (S)-(+)-2-({[(4-bromophenyl)ethyl]imino}methyl)naphthalene, C19H

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3

Ansink, Harold R. W., Erik J. De Graaf, Erwin Zelvelder, and Hans Cerfontain. "Reactions of SO2X mono-substituted arenes with SO3 in nitromethane: electronic and steric directing effects of the sulfonic acid group and some model substituents." Canadian Journal of Chemistry 71, no. 2 (1993): 210–15. http://dx.doi.org/10.1139/v93-031.

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The sulfonation of benzene-SO2X (X = CH3, OCH3, OH, and Cl) and of 1- and 2-naphthalene-SO2X (X = CH3, OCH3, and Cl) with sulfur trioxide in nitromethane as solvent has been studied. In the benzene series, substitution only occurs at the 3-position irrespective of X; the reaction rates, which are all within the same order of magnitude, are low. Upon sulfonation of the 1-SO2X-substituted naphthalenes, the main sulfonation product (58–80%) is the 5-sulfonic acid (5-S); in addition, 6-S and small amounts of 3-S and 7-S are formed. Also, the formation of the intermolecular sulfonic anhydride of 1-

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4

El-Dossoki, Farid I. "Protonation and Solvation Thermodynamics of Some Naphthol Derivatives in KCl Aqueous Solution of Different Ionic Strengths." Journal of Chemistry 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/7234320.

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The acid-base properties of naphthalen-1-ol (L1), naphthalene-1,5-diol (L2), and 4-amino-3-hydroxynaphthalene-1-sulphonic acid (L3) were characterized from pH-metric measurements in pure water and in different concentrations (0–4 mol kg−1) of aqueous KCl solutions at the temperature range ofT= (293.15 to 213.15) K at 5 K intervals. The results reveal that naphthalen-1-ol and naphthalene-1,5-diol molecules have two ionisable protons (of the hydroxyl groups) while 4-amino-3-hydroxynaphthalene-1-sulphonic acid has three ionisable protons (hydrogen ion of the hydroxyl group, SO3H, andNH3+). Modeli

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5

Ibrahim, Mohamed N., Salaheddin A. I. Sharif, Ahmad N. EL-Tajory, and Asma A. Elamari. "Synthesis and Antibacterial Activities of Some Schiff Bases." E-Journal of Chemistry 8, no. 1 (2011): 212–16. http://dx.doi.org/10.1155/2011/258340.

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Schiff basesp-hydroxybenzylidene-2-carboxyaniline,p-nitrobenz-ylidene-2-carboxyaniline,p-(N, N-dimethyl)aminobenzylidene-2-carboxyaniline,N-(4-hydroxybezylidene)-benzene-1,2-diamine,N--(4-nitrobezylidene)benzene-1,2-diamine,N-(4-(N, N-dimethylaminobezylidene)benzene-1,2-diamine,N-(4-(N,N-dimethylamino)benzylidene)naphthalen-1-amine,N-(4-nitrobenzylidene)naphthalen-1-amine,N--(4-chlorobenzylidene)naphthalen-1-amine,sodium-4-(4-(N,N-dimethyl amino)benzylideneamino)naphthalene-1-sulfonate,sodium -4-(4-nitrobenzylidene-amino)naphthalene-1-sulfonate and sodium-4-(4-chlorobenzylideneamino) naphthale

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6

Xu, Peng, Wencheng Ma, Hongjun Han, Baolin Hou, and Shengyong Jia. "Characterization of naphthalene degradation by Streptomyces sp. QWE-5 isolated from active sludge." Water Science and Technology 70, no. 6 (2014): 1129–34. http://dx.doi.org/10.2166/wst.2014.356.

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A bacterial strain, QWE-5, which utilized naphthalene as its sole carbon and energy source, was isolated and identified as Streptomyces sp. It was a Gram-positive, spore-forming bacterium with a flagellum, with whole, smooth, convex and wet colonies. The optimal temperature and pH for QWE-5 were 35 °C and 7.0, respectively. The QWE-5 strain was capable of completely degrading naphthalene at a concentration as high as 100 mg/L. At initial naphthalene concentrations of 10, 20, 50, 80 and 100 mg/L, complete degradation was achieved within 32, 56, 96, 120 and 144 h, respectively. Kinetics of napht

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7

Zhang, Ru Ling. "Study on Pollution Level, Distribution and Sources of Polychlorinated Naphthalene in River Sediments." Applied Mechanics and Materials 686 (October 2014): 689–94. http://dx.doi.org/10.4028/www.scientific.net/amm.686.689.

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Polychlorinated naphthalene (PCNs) is similar structure and toxicity of dioxin (PCDD/Fs), it can be detected in the global environmental and biological samples. This paper introduces the main source of PCNs in the environment and environmental fate, sludge PCNs pollution level in 1.48~28.21 ng/g (dry weight), PCN-TEQs content is in 0.11~2.45 pg/g (dry weight), far below the content of other areas in foreign countries. The results showed that the sources of wastewater, sewage treatment plant is an important factor affecting the level of polychlorinated naphthalene pollution. Discussion on the d

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8

Gallucci, J. C., D. J. Hart, and D. G. J. Young. "Nucleophile–Electrophile Interactions in 1,8-Disubstituted Naphthalenes: Structures of Three 1-Naphthaldehydes and a 1-Naphthyl Methyl Ketone." Acta Crystallographica Section B Structural Science 54, no. 1 (1998): 73–81. http://dx.doi.org/10.1107/s0108768197009440.

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4,8-Dimethoxy-5-(tosyloxy)-1-naphthaldehyde (1) and 8-methoxy-5-(tosyloxy)-1-naphthaldehyde (2) crystallize such that the formyl groups approach coplanarity with the naphthalene rings. 4′,8′-Dimethoxy-5′-(tosyloxy)-1′-acetonaphthone (4), however, crystallizes such that the acetyl group approaches orthogonality to the naphthalene ring. In all three compounds the methoxy group and carbonyl groups exhibit a leaning effect typical of nucleophile–electrophile interactions in 1,8-disubstituted naphthalenes. 8-(Benzoyloxy)-4-methoxy-1-naphthaldehyde (3) crystallizes with the formyl group nearly copla

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9

Schmidbaur, H., W. Bublak, and G. Müller. "Cyclophan-Metall-Komplexe: Synthese und Kristallstruktur von ([2](l,4)Naphthalino[2]paracyclophan)gallium(I)-tetrabromogallat(III)/Cyclophane Metal Complexes: Synthesis and Crystal Structure of ([2]( 1,4)Naphthalino[2]paracyclophane)gallium(I) Tetrabromogallate(III)." Zeitschrift für Naturforschung B 42, no. 2 (1987): 147–50. http://dx.doi.org/10.1515/znb-1987-0205.

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AbstractThe title complex has been prepared from Ga[GaBr4] and [2](1,4)naphthalino[2]paracyclophane in toluene as a solvent, and the crystal structure of this adduct determined by single crystal X-ray diffraction. The structure is composed of dimeric units Ga2[GaBr4]2 , which are crosslinked into sheets through Ga(I)-arene coordination. Both the benzene ring and the substituted ring of the naphthalene system are η6-bonded from the outer side of the cyclophane cage, each to an univalent metal. The benzene and the naphthalene form an interplane angle of 49.3°. The distance to the benzene ring (2

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10

Tummala, Manorama, Raj K. Dhar, Frank R. Fronczek, and Steven F. Watkins. "1-[3-(Naphthalen-1-yl)phenyl]naphthalene." Acta Crystallographica Section E Structure Reports Online 69, no. 2 (2013): o307. http://dx.doi.org/10.1107/s1600536813002407.

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The title compound, C26H18, consists of a benzene ring withmeta-substituted 1-naphthalene substituents, which are essentially planar (r.m.s. deviation = 0.039 and 0.027 Å). The conformation is mixedsyn/anti, with equivalent torsion angles about the benzene–naphthalene bonds of 121.46 (11) and 51.58 (14)°.

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11

Wolfenden, Mark L., Raj K. Dhar, Frank R. Fronczek, and Steven F. Watkins. "2-[3-(Naphthalen-2-yl)phenyl]naphthalene." Acta Crystallographica Section E Structure Reports Online 69, no. 2 (2013): o308. http://dx.doi.org/10.1107/s1600536813002390.

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The title compound, C26H18, consists of a benzene ring withmeta-substituted 2-naphthalene substituents, which are essentially planar [r.m.s. deviations = 0.022 (1) and 0.003 (1) Å]. The conformation issyn, with equivalent torsion angles about the benzene–naphthalene bonds of −36.04 (13) and +34.14 (13)°. The molecule has quasi-Csmolecular symmetry.

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12

Haget, Y., N. B. Chanh, A. Meresse, et al. "Isomorphism and mixed crystals in 2-R-naphthalenes: evidence of structural subfamilies and prediction of metastable forms." Journal of Applied Crystallography 32, no. 3 (1999): 481–88. http://dx.doi.org/10.1107/s0021889899002423.

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Solid–liquid binary phase diagrams and isothermal unit-cell parameters as a function of composition are given for the high-temperature form (P21/a,Z= 2) mixed crystals generated by 2-fluoronaphthalene, naphthalene and 2-naphthol with four other β derivatives of naphthalene. The study leads to the distinction between two high-temperature forms (or types of packing). The first one (type 1) is taken by five 2-R-naphthalenes (R= F, Cl, Br, SH, CH3; the first subfamily), the second one (type 2) by naphthalene itself and 2-naphthol (R= H, OH; the second subfamily). The crystallographic data also all

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13

Zhang, Mao-Xi, Nathaniel B. Zuckerman, Philip F. Pagoria, et al. "Mono- and Dinitro-BN-Naphthalenes: Formation and Characterization." Molecules 26, no. 14 (2021): 4209. http://dx.doi.org/10.3390/molecules26144209.

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Mono- and dinitro-BN-naphthalenes, i.e., 1-nitro-, 3-nitro-, 1,6-dinitro-, 3,6-dinitro-, and 1,8-dinitro-BNN, were generated in the nitration of 9,10-BN-naphthalene (BNN), a boron–nitrogen (BN) bond-embedded naphthalene, with AcONO2 and NO2BF4 in acetonitrile. The nitrated products were isolated and characterized by NMR, GC-MS, IR, and X-ray single crystallography. The effects of the nitration on the electron density and aromaticity of BNN were evaluated by B-11 NMR analysis and HOMA calculations.

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14

Wu, Kai, Yuting Gao, Zhenni Yu, et al. "A facile fluorescent chemosensor based on naphthalene-derived Schiff base for zinc ions in aqueous solution." Anal. Methods 6, no. 11 (2014): 3560–63. http://dx.doi.org/10.1039/c4ay00431k.

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15

Rahman, Mohammed M., Tahir Ali Sheikh, Reda M. El-Shishtawy, Muhammad Nadeem Arshad, Fatimah A. M. Al-Zahrani, and Abdullah M. Asiri. "Fabrication of Sb3+sensor based on 1,1′-(-(naphthalene-2,3-diylbis(azanylylidene))bis(methanylylidene))bis(naphthalen-2-ol)/nafion/glassy carbon electrode assembly by electrochemical approach." RSC Advances 8, no. 35 (2018): 19754–64. http://dx.doi.org/10.1039/c8ra01827h.

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A new Schiff base named 1,1′-(-(naphthalene-2,3-diylbis(azanylylidene))bis(methanylylidene))bis(naphthalen-2-ol) (NDNA) was synthesized by condensation reaction and then characterized by spectroscopic techniques for structure elucidation.

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16

Xia, Min, Shao-Qin Ge, and Xiang-Sheng Li. "Difluoro[1-(1-naphthyliminomethyl)-2-naphtholato-N,O]boron." Acta Crystallographica Section E Structure Reports Online 62, no. 7 (2006): o2625—o2626. http://dx.doi.org/10.1107/s160053680602068x.

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The title compound, C21H14BF2NO, was synthesized by the reaction of 3-[(E)-(naphthalen-1-ylimino)methyl]naphthalen-2-ol, diisopropylethylamine and boron trifluoride etherate. The mean planes of the two naphthalene systems make a dihedral angle of 71.97 (4)°. The crystal packing is stabilized by π–π stacking interactions and van der Waals forces.

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17

Chetioui, Souheyla, Djamil-Azzeddine Rouag, Jean-Pierre Djukic, et al. "Crystal structures of a copper(II) and the isotypic nickel(II) and palladium(II) complexes of the ligand (E)-1-[(2,4,6-tribromophenyl)diazenyl]naphthalen-2-ol." Acta Crystallographica Section E Crystallographic Communications 72, no. 8 (2016): 1093–98. http://dx.doi.org/10.1107/s205698901601080x.

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In the copper(II) complex, bis{(E)-1-[(2,4,6-tribromophenyl)diazenyl]naphthalen-2-olato}copper(II), [Cu(C16H8Br3N2O)2], (I), the metal cation is coordinated by two N atoms and two O atoms from two bidentate (E)-1-[(2,4,6-tribromophenyl)diazenyl]naphthalen-2-olate ligands, forming a slightly distorted square-planar environment. In one of the ligands, the tribromobenzene ring is inclined to the naphthalene ring system by 37.4 (5)°, creating a weak intramolecular Cu...Br interaction [3.134 (2) Å], while in the other ligand, the tribromobenzene ring is inclined to the naphthalene ring system by 72

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18

Prim, Damien, and Benjamin Large. "C–H Functionalization Strategies in the Naphthalene Series: Site Selections and Functional Diversity." Synthesis 52, no. 18 (2020): 2600–2612. http://dx.doi.org/10.1055/s-0040-1707855.

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Naphthalene is certainly not a common arene. In contrast to benzene, the bicyclic feature of naphthalene offers multiple differentiable positions and thus a broad diversity of substitution patterns. Naphthalene is a central building block for the construction of elaborated polycyclic architectures with applications in broad domains such as life and materials sciences. As a result, C–H functionalization strategies specially designed for naphthalene substrates have become essential to install valuable substituents on one or both rings towards polysubstituted naphthalenes. This short review provi

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19

Wang, Jinfeng, Phillip H. Geil, Martina Kaszonyiova, and Frantisek Rybnikar. "Morphology and crystal structures of poly(2,6-naphthalene terephthalate) and poly(2,6-naphthalene naphthalate)." Polymer 47, no. 15 (2006): 5467–77. http://dx.doi.org/10.1016/j.polymer.2005.02.131.

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20

Albraihi, Amin M. M. N., Khalil Al Mamari, and Niyazi A. S. Al-Areqi. "Comprehensive Study of Polychlorinated Naphthalene Compounds in Materials and Products: Review." Abhath Journal of Basic and Applied Sciences 2, no. 1 (2023): 14–22. http://dx.doi.org/10.59846/ajbas.v2i1.447.

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Polychlorinated naphthalenes (PCNs) consist of 75 potential congeners in eight homologous groups. PCNs are toxic, resist decomposition, and bioaccumulate in adipose tissue. They are transported through air, water, and migratory birds, across international borders and precipitate far from place. Released, where they accumulate in terrestrial and aquatic ecosystems, PCNs form as unintended persistent organic pollutants (UPOPs) with PCDDs, PCDFs, PCBs, and other UPOPs. The use of polychlorinated naphthalenes in multiple applications such as chlorine rubber, pyrene, sealants or adhesives, and in s

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21

V, BALIAH, and BALASUBRAMANIYAN V. "Dipole Moments of some Naphthalene Derivatives. A Study of the Conformational Preferences of Substituent Groups." Journal of Indian Chemical Society Vol.70, Sep 1993 (1993): 755–61. https://doi.org/10.5281/zenodo.5939741.

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Department of Chemistry, Annamalai University, Annamalainagar-608 002 Department of Chemistry, H P T College, Nasik-422 005 <em>Manuscript received 31 October 1991, revised 11 March 1993, accepted 30 March 1993</em> The electric dipole moments of more than fifty naphthalene derivatives have been determined. Steric, polar and field effects existing in disubstituted naphthalenes are studied by comparing the observed dipole moments with those calculated by vector addition of group moments. The conformational preferences of the substituent groups in a number of disubstituted naphthalenes are

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22

Ghods, Azadeh, Jayne Gilbert, Jennifer R. Baker, Cecilia C. Russell, Jennette A. Sakoff, and Adam McCluskey. "A focused library synthesis and cytotoxicity of quinones derived from the natural product bolinaquinone." Royal Society Open Science 5, no. 4 (2018): 171189. http://dx.doi.org/10.1098/rsos.171189.

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Bolinaquinone is a natural product that is a structurally complex, cytotoxic sesquiterpene quinone. A scaffold simplification and focused library approach using a microwave-assisted Suzuki coupling gave 32 bolinaquinone analogues with good-to-excellent cytotoxicity profiles. Mono-arylbenzoquinones, Library A , were preferentially toxic towards BE2-C (neuroblastoma) cells with growth inhibition (GI 50 ) values of 4–12 µM; only the 3,4-dimethoxyphenyl 23 and 3-biphenyl 28 variants were broad-spectrum active—HT29 (colon carcinoma), U87 and SJ-G2 (glioblastoma), MCF-7 (breast carcinoma), A2780 (ov

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23

Zhang, Wang, Xinye Zhao, Weijing Gu, et al. "A novel naphthalene-based fluorescent probe for highly selective detection of cysteine with a large Stokes shift and its application in bioimaging." New Journal of Chemistry 42, no. 22 (2018): 18109–16. http://dx.doi.org/10.1039/c8nj04425b.

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An efficient naphthalene-based fluorescent probe (BTNA) for cysteine (Cys) has been rationally designed and synthesized in this work, which consists of a 6-(2-benzothiazolyl)-2-naphthalenol (BNO) fluorophore connected with an acrylate group (the fluorescence quenching and response group).

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24

Ozeryanskii, Valery A., Ekaterina V. Kolupaeva та Alexander F. Pozharskii. "N-Methylated 1,8-Diaminonaphthalenes as Bifunctional Nucleophiles in Reactions with α,ω-Dihalogenoalkanes: A Facile Route to Heterocyclic and Double Proton Sponges". Synthesis 52, № 22 (2020): 3427–38. http://dx.doi.org/10.1055/s-0040-1707079.

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The reaction of 1-dimethylamino-8-(methylamino)naphthalene with 1,3-dibromopropane chemoselectively leads to the product of N,N′-heterocyclization, while in the case of 1,4-dibromobutane and 1,2-bis(bromomethyl)benzene the process results in heterocyclization onto the same nitrogen atom with the formation of previously unknown 1-dimethylamino-8-pyrrolidino- and 1-dimethylamino-8-isoindolino-naphthalenes. The same reactions conducted without adding any auxiliary base lead to the formation of N,N′-linked double proton sponges as a new type of polynitrogen organic receptor. Proceeding as a sequen

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25

Bedi, Anjan, Linda J. W. Shimon, Benny Bogoslavsky, and Ori Gidron. "Easier to Twist than Bend: The Scope of the Bridge Formation Approach to Naphthalenophane Synthesis." Organic Materials 02, no. 04 (2020): 323–29. http://dx.doi.org/10.1055/s-0040-1721102.

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Twisting anthracene and higher acenes can alter their optical, magnetic, and electronic properties. To test the effect of twisting on the lower homologue, naphthalene, we synthesized tethered naphthalenophanes bearing alkyl bridges. Both X-ray structure and DFT calculations show that hexyl and butyl bridges induce a 6° and 12° end-to-end twist on the naphthalene unit, respectively. Attempts to increase the twisting further using shorter tethers resulted in an elimination product. Enantiomerically pure naphthalenophanes display strong chiroptical properties, which intensify with increasing twis

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Bedi, Anjan, W. Shimon Linda J., Benny Bogoslavsky, and Ori Gidron. "Easier to Twist than Bend: The Scope of the Bridge Formation Approach to Naphthalenophane Synthesis." Organic Materials 02 (December 14, 2022): 323. https://doi.org/10.1055/s-0040-1721102.

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Twisting anthracene and higher acenes can alter their optical, magnetic, and electronic properties. To test the effect of twisting on the lower homologue, naphthalene, we synthesized tethered naphthalenophanes bearing alkyl bridges. Both X-ray structure and DFT calculations show that hexyl and butyl bridges induce a 6° and 12° end-to-end twist on the naphthalene unit, respectively. Attempts to increase the twisting further using shorter tethers resulted in an elimination product. Enantiomerically pure naphthalenophanes display strong chiroptical properties, which intensify with increas

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27

Hu, Jian-yong, Ryuji Ueno, Minoru Miyazaki, and Takehiko Yamato. "Medium-sized Cyclophanes. Part 76.1 Synthesis of syn-9-methoxy (1,4)naphthaleno[3.3]metacyclophanes and their charge-transfer Complexes with Tetracyanoethylene in CH2Cl2." Journal of Chemical Research 2007, no. 7 (2007): 404–6. http://dx.doi.org/10.3184/030823407x228768.

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The charge-transfer band of syn-9-methoxy(1,4)naphthaleno[3.3]metacyclophanes with tetracyanoethylene in CH2Cl2 are observed in the range of 604–606 nm, which is arising from the exclusive formation on the naphthalene ring due to the expanded π-electron density as well as the steric hindrance of the inner methoxy group at 9-position.

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Zhu, Jian Qing, Wei Wang, and Hui Ying Xu. "QSPR Models for the Physicochemical Properties of Polychlorinated Naphthalene Congeners." Advanced Materials Research 726-731 (August 2013): 440–43. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.440.

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Based on quantitative structureproperty relationship (QSPR) of organic compounds, geometrical optimization and quantum chemical parameter calculations have been performed at the B3LYP/6-31G* level of theory for 75 polychlorinated naphthalenes (PCNs). A number of statistically-based parameters have been obtained. Relationship between the physicochemical properties of polychlorinated naphthalene compounds (n-octanol/air partition coefficient, sub-cooled liquid vapor pressure, water solubility) and the structural descriptors have been established by multiple linear regression (MLR) method. The re

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29

Tsybulin, Semyon V., Ekaterina A. Filatova, Alexander F. Pozharskii, Valery A. Ozeryanskii, and Anna V. Gulevskaya. "Synthesis, structure, and properties of switchable cross-conjugated 1,4-diaryl-1,3-butadiynes based on 1,8-bis(dimethylamino)naphthalene." Beilstein Journal of Organic Chemistry 19 (May 15, 2023): 674–86. http://dx.doi.org/10.3762/bjoc.19.49.

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A set of novel 1,4-diaryl-1,3-butadiynes terminated by two 7-(arylethynyl)-1,8-bis(dimethylamino)naphthalene fragments was prepared via the Glaser–Hay oxidative dimerization of 2-ethynyl-7-(arylethynyl)-1,8-bis(dimethylamino)naphthalenes. The oligomers synthesized in this way are cross-conjugated systems, in which two conjugation pathways are possible: π-conjugation of 1,8-bis(dimethylamino)naphthalene (DMAN) fragments through a butadiyne linker and a donor–acceptor aryl–C≡C–DMAN conjugation path. The conjugation path can be “switched” simply by protonation of DMAN fragments. X-ray diffraction

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30

Slitikov, P. V., and E. N. Rasadkina. "Aminomethylation of naphthalen-2-ol and naphthalene-2,7-diol." Russian Journal of Organic Chemistry 52, no. 10 (2016): 1432–35. http://dx.doi.org/10.1134/s1070428016100109.

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Teng, Zhuochao, Yanan Han, Shuming He, et al. "The Homogeneous Gas-Phase Formation Mechanism of PCNs from Cross-Condensation of Phenoxy Radical with 2-CPR and 3-CPR: A Theoretical Mechanistic and Kinetic Study." International Journal of Molecular Sciences 23, no. 11 (2022): 5866. http://dx.doi.org/10.3390/ijms23115866.

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Chlorophenols (CPs) and phenol are abundant in thermal and combustion procedures, such as stack gas production, industrial incinerators, metal reclamation, etc., which are key precursors for the formation of polychlorinated naphthalenes (PCNs). CPs and phenol can react with H or OH radicals to form chlorophenoxy radicals (CPRs) and phenoxy radical (PhR). The self-condensation of CPRs or cross-condensation of PhR with CPRs is the initial and most important step for PCN formation. In this work, detailed thermodynamic and kinetic calculations were carried out to investigate the PCN formation mech

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Young, Jay A. "Naphthalene." Journal of Chemical Education 81, no. 6 (2004): 795. http://dx.doi.org/10.1021/ed081p795.

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Luttrell, William E. "Naphthalene." Journal of Chemical Health and Safety 16, no. 2 (2009): 27–29. http://dx.doi.org/10.1016/j.jchas.2009.01.004.

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Zelaya, Carlos A., Edwin D. Stevens, and Michael K. Dowd. "Di(phenylpropylamino)gossypol: a derivative of the dimeric natural product gossypol." Acta Crystallographica Section C Crystal Structure Communications 69, no. 4 (2013): 439–43. http://dx.doi.org/10.1107/s0108270113006288.

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Di(phenylpropylamino)gossypol [systematic name: 2,2′-bis{1,6-dihydroxy-5-isopropyl-8-[(3-phenylpropylamino)methylidene]naphthalen-7-one}, C48H52N2O6, was formed by reaction of the dimeric natural product gossypol with 3-phenylpropylamine. The structure of this compound has its two naphthalene ring systems oriented approximately perpendicular to each other, and the two pendant phenylpropyl groups have different conformations. One of these side groups is considerably disordered at room temperature but less so at 120 K. The enantiomeric molecules form centrosymmetric dimers that are supported by

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35

Annweiler, Eva, Walter Michaelis, and Rainer U. Meckenstock. "Identical Ring Cleavage Products during Anaerobic Degradation of Naphthalene, 2-Methylnaphthalene, and Tetralin Indicate a New Metabolic Pathway." Applied and Environmental Microbiology 68, no. 2 (2002): 852–58. http://dx.doi.org/10.1128/aem.68.2.852-858.2002.

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ABSTRACT Anaerobic degradation of naphthalene, 2-methylnaphthalene, and tetralin (1,2,3,4-tetrahydronaphthalene) was investigated with a sulfate-reducing enrichment culture obtained from a contaminated aquifer. Degradation studies with tetralin revealed 5,6,7,8-tetrahydro-2-naphthoic acid as a major metabolite indicating activation by addition of a C1 unit to tetralin, comparable to the formation of 2-naphthoic acid in anaerobic naphthalene degradation. The activation reaction was specific for the aromatic ring of tetralin; 1,2,3,4-tetrahydro-2-naphthoic acid was not detected. The reduced 2-na

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Chen, Zhixin, and Liming Hu. "Adsorption of Naphthalene on Clay Minerals: A Molecular Dynamics Simulation Study." Materials 15, no. 15 (2022): 5120. http://dx.doi.org/10.3390/ma15155120.

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Naphthalene, as one of the representative polycyclic aromatic hydrocarbons, widely exists in contaminated sites and is a potential threat to human health due to its high mobility in soil. The interaction between naphthalene and clay minerals is of great significance to the environmental behavior of naphthalene and the design of remediation technology. In this study, montmorillonite and kaolinite were selected as representative clay minerals. Naphthalene adsorption behavior on mineral surfaces and water-wet kaolinite surfaces was investigated using molecular dynamics (MD) simulation. The intera

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Heinis, Thomas, Swapan Chowdhury, and Paul Kebarle. "Electron affinities of naphthalene, anthracene and substituted naphthalenes and anthracenes." Organic Mass Spectrometry 28, no. 4 (1993): 358–65. http://dx.doi.org/10.1002/oms.1210280416.

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Reza, Annisa Indah, Kento Iwai, and Nagatoshi Nishiwaki. "A Study of the Correlation between the Bulkiness of peri-Substituents and the Distortion of a Naphthalene Ring." Molecules 28, no. 14 (2023): 5343. http://dx.doi.org/10.3390/molecules28145343.

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A systematic study on the distortion of a naphthalene ring was performed using steric repulsion between peri-substituents at the 1- and 8-positions. The introduction of bromo groups into the methyl groups of the 1,8-dimethylnaphthalene enhanced the steric repulsion to distort the naphthalene ring. X-ray crystallography revealed that 1,8-bis(bromomethyl)naphthalene had a vertical distortion with a 11.0° dihedral angle (α) between peri-substituents which disturbed the coplanarity of the naphthalene ring. On the other hand, the dihedral angle of 1,8-bis(dibromomethyl)naphthalene was smaller (α =

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Agung, Sumarno, Syafwandi Syafwandi, Adelia Rizky Fatmawati, and Sumiyati Sumiyati. "Comparation Study of The Use Naftalena From Coal Tar Waste with Camper Naphtalene As Concrete Admixture." Journal of Applied Science, Engineering, Technology, and Education 2, no. 2 (2020): 165–73. http://dx.doi.org/10.35877/454ri.asci2160.

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Concrete is a mixture of Portland cement or other hydraulic cement, fine aggregate, coarse aggregate, and water, with or without additives (admixture). The naphthalene superplasticizer used comes from the distillation of coal tar and a little from the rest of petroleum, but there is also camphor naphthalene. Where camphor grains contain 250-500 mg of naphthalene. Naphthalene is mostly produced from coal tar distillation, and a little from the rest of the fractionation of petroleum, by the molecular formula (C10H8) and in the form of two unified benzene rings. This compound is volatile, volatil

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Sumarno, Agung, Syafwandi Syafwandi, Fatmawati Adelia Rizky, and Sumiyati Sumiyati. "Comparation Study of the Use Naftalena from Coal Tar Waste with Camper Napthtalene as Concrete Admixture." IJTI (International Journal of Transportation and Infrastructure) 3, no. 2 (2020): 99–108. http://dx.doi.org/10.29138/ijti.v3i2.1061.

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Concrete is a mixture of Portland cement or other hydraulic cement, fine aggregate, coarse aggregate, and water, with or without additives (admixture). The naphthalene superplasticizer used comes from distillation of coal tar and a little from the rest of petroleum, but there is also camphor naphthalene. Where camphor grains contain 250-500 mg of naphthalene. Naphthalene is mostly produced from coal tar distillation, and a little from the rest of the fractionation of petroleum, by the molecular formula (C10H8) and in the form of two unified benzene rings. This compound is volatile, volat

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Xu, Zhiyong, Ting Feng, Zhenchang Wen, et al. "New Naphthalene Derivatives from the Mangrove Endophytic Fungus Daldinia eschscholzii MCZ-18." Marine Drugs 22, no. 6 (2024): 242. http://dx.doi.org/10.3390/md22060242.

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Five new naphthalene derivatives dalesconosides A–D, F (1–4, 6), a known synthetic analogue named dalesconoside E (5), and eighteen known compounds (7–24) were isolated from Daldinia eschscholzii MCZ-18, which is an endophytic fungus obtained from the Chinese mangrove plant Ceriops tagal. Differing from previously reported naphthalenes, compounds 1 and 2 were bearing a rare ribofuranoside substituted at C-1 and the 5-methyltetrahydrofuran-2,3-diol moiety, respectively. Their structures were determined by detailed nuclear magnetic resonance (NMR) and mass spectroscopic (MS) analyses, while the

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Larchenka, A. Yu, та M. I. Mandryk. "Analysis of the Key Determinants of Naphthalene Degradation by <i>Rhodococcus</i> <i>pyridinivorans</i> 5Ар". Микробиология 92, № 4 (2023): 418–26. http://dx.doi.org/10.31857/s0026365623600025.

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Abstract—Wild-type cells of Rhodococcus pyridinivorans 5Ар were found to be highly efficient naphthalene degraders, completely utilizing this compound (500 mg/L) after 3 days, and may be used for remediation of naphthalene-contaminated aquatic ecosystems. Inactivation of the biodegradation genes narAa (encoding the large subunit of naphthalene dioxygenase) and narB (encoding cis-naphthalene dihydrodiol dehydrogenase) resulted it the loss of ability to use naphthalene as the sole energy source, which indicated the absence in the genome of R. pyridinivorans 5Ар of the determinants responsible fo

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Sharma, Kratika, Indranil Das, Pankaj Jhaldiyal, and Akshat Kumar. "Naphthalene Toxicity-Winter Poison in Teenager." Indian Journal of Emergency Medicine 4, no. 2 (2018): 160–61. http://dx.doi.org/10.21088/ijem.2395.311x.4218.17.

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Introduction: Naphthalene is bicyclic aromatic hydrocarbon most commonly used as insect and moth repellent household product for storing clothes. The toxic manifestations have been proposedly due to increased free radical formation leading to lipid peroxidation and formation of epoxide and further ultimate DNA damage. Naphthalene toxicity manifests at doses ranging 5 to 15 gms to incidences as low as 2 gm have been reported in children.

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Whitman, Brian E., Donald R. Lueking, and James R. Mihelcic. "Naphthalene uptake by a Pseudomonas fluorescens isolate." Canadian Journal of Microbiology 44, no. 11 (1998): 1086–93. http://dx.doi.org/10.1139/w98-110.

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TThe uptake of naphthalene has been investigated in the metabolizing cells of Pseudomonas fluorescens utilizing [1-14C]naphthalene. The uptake displayed an affinity constant (Kt) of 11 μM and a maximal velocity (Vmax) of 17 nmol·h-1·mg-1 cellular dry weight. Naphthalene uptake was not observed in a mutant strain, TG-5, which was unable to utilize naphthalene as a sole source of carbon for growth. Uptake was significantly inhibited (~90%) by the presence of growth-inhibiting levels of either azide or 2,4-dinitrophenol and was sensitive to the presence of structural analogues of naphthalene. The

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Vandana, Boyapati, Umesha C., and Kottala Nikitha. "Effect of Phosphorus and Naphthalene Acetic Acid on Growth and Yield of Green Gram." Environment and Ecology 41, no. 3 (2023): 1353–57. http://dx.doi.org/10.60151/envec/nogc7110.

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The field experiment entitled “Effect of Phosphorus and Naphthalene acetic acid (NAA) on growth and yield of Green gram” was conducted during Zaid, 2022 at Crop Research Farm, Department of Agronomy, Naini Agriculture Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, Uttar Pradesh. ‘The experiment was conducted in Randomized Block Design with ten treatments which are replicated thrice with three levels of application of Phosphorus 20, 40, 60 kg/ha and three levels of application of Naphthalene acetic acid 20, 40, 60 ppm and control. The different treatm

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Yuan, Changchun, Peng Nan, Suhua Shi, and Yang Zhong. "Chemical Composition of the Essential Oils of Two Chinese Endemic Meconopsis Species." Zeitschrift für Naturforschung C 58, no. 5-6 (2003): 313–15. http://dx.doi.org/10.1515/znc-2003-5-603.

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Abstract The essential oils from two Chinese endemic Meconopsis species, i. e., M. punicea and M. delavayi, were analyzed by using GC-MS for the first time. The major constituents were hexadecanoic acid (16.8%), 1,2-dimethyl naphthalene (11.4%), 1,4-dimethyl naphthalene (6.6%), 1,3-dimethyl-5-ethyl naphthalene (5.9%), and 3-methyl biphenyl (5.6%) for M. punicea, and hexadecanoic acid (9.9%), 1,2-dimethyl naphthalene (7.9%), 1,3-dimethyl-5-ethyl naphthalene (6.2%), tetradecane (5.9%), and hexyl cinnamaldehyde (5.5%) for M. delavayi.

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47

Kalashgrani, Masoomeh Yari, Aziz Babapoor, Seyyed Mojtaba Mousavi, et al. "Synthesis of Isoreticular Metal Organic Framework-3 (IRMOF-3) Porous Nanostructure and Its Effect on Naphthalene Adsorption: Optimized by Response Surface Methodology." Separations 10, no. 4 (2023): 261. http://dx.doi.org/10.3390/separations10040261.

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Naphthalene is a carcinogenic compound and its environmental release poses a major risk to human and aquatic health. Therefore, the application of nanomaterial technologies for naphthalene removal from wastewater has attracted significant attention. In this research, for the first time, the performance of IRMOF-3 for naphthalene removal from aqueous media is evaluated. IRMOF-3 with a specific surface area of 718.11 m2·g−1 has the ability to absorb naphthalene from synthetic wastewater to a high extent. The structures and morphology of IRMOF-3 were determined by FT-IR, XRD, SEM and BET analyses

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Praharaj, Samir Kumar, and Sreejayan Kongasseri. "Naphthalene Addiction." Substance Abuse 33, no. 2 (2012): 189–90. http://dx.doi.org/10.1080/08897077.2011.634966.

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Kündig, E. P., C. Perret, S. Spichiger, and G. Bernardinelli. "Naphthalene complexes." Journal of Organometallic Chemistry 286, no. 2 (1985): 183–200. http://dx.doi.org/10.1016/0022-328x(85)88005-0.

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Cané, Elisabetta, Andrea Miani, and Agostino Trombetti. "Anharmonic Force Fields of Naphthalene-h8and Naphthalene-d8." Journal of Physical Chemistry A 111, no. 33 (2007): 8218–22. http://dx.doi.org/10.1021/jp071610p.

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