Relevant bibliographies by topics / Terminal Carbon Atoms

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Academic literature on the topic 'Terminal Carbon Atoms'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Terminal Carbon Atoms"

1

Jarjis, Hayfa M., and Salim M. Khalil. "MINDO-Forces Study of Phenyl and Cyclopropyl Substituted Allyl Cations and Anions." Zeitschrift für Naturforschung A 42, no. 3 (1987): 297–304. http://dx.doi.org/10.1515/zna-1987-0317.

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MINDO-force calculations have been performed on phenyl and cyclopropyl substituted allyl cations and anions with complete energy minimization. It is found that the phenyl ring destabilizes the allyl cations when substituted at the terminal and at the center carbon atom of the cation, while the cyclopropyl ring stabilizes the allyl cation when substituted at the terminal carbon atoms, but destabilizes the cation when substituted at the center carbon atom of the cation. These results agree with the experimental ones. In the case of the allyl anions, it is found that the phenyl ring destabilizes
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2

Islamallah, Bari Muhamd. "Preparation of Series Schiff Bases and Studying of their Liquid Crystalline Behavior." American International Journal of Humanities, Arts and Social Sciences 1, no. 1 (2019): 17–23. http://dx.doi.org/10.46545/aijhass.v1i1.57.

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Our study deals with preparation of two types of imine compounds differ in the type of terminal group, where one of them has a terminal carboxyl group COOH while the other contains methoxyOCH3 as a terminal group. In the first part of this research it was Identification by spectroscopy methods using infrared IR and nuclear magnetic resonance H NMR spectrum, besides elemental analysis shows the exact chemical structure of the expected synthesized compounds. In the second part was the study of liquid-crystalline behavior by polarized optical microscopy POM and differential scanning calorimetry D
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3

P., G. Mundhe. "Study of activation energy and order of reaction of some liquid crystals." Journal of Indian Chemical Society Vol. 76, May 1999 (1999): 246–49. https://doi.org/10.5281/zenodo.5848767.

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Department of Chemistry, J. E. S. College, Jalna-431 203, India <em>Manuscript received 30 June 1998, revised 10 December 1998, accepted 3 February 1999</em> Liquid crystals of the type p-phenylene-di-<em>p</em>-n-alkoxy benzoate have been prepared. Kissinger isothermal decomposition method has been used for determination of activation energy values of liquid crystals. Kissinger&#39;s assessment for shape index of <strong>DTA </strong>peaks is used to find the order of reaction. There is no direct relationship between the carbon atoms in terminal methylene groups and <em>E</em><sub>a</sub> val
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4

So, Chi Ming, Craig D. Phelps, and L. Y. Young. "Anaerobic Transformation of Alkanes to Fatty Acids by a Sulfate-Reducing Bacterium, Strain Hxd3." Applied and Environmental Microbiology 69, no. 7 (2003): 3892–900. http://dx.doi.org/10.1128/aem.69.7.3892-3900.2003.

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ABSTRACT Strain Hxd3, an alkane-degrading sulfate reducer previously isolated and described by Aeckersberg et al. (F. Aeckersberg, F. Bak, and F. Widdel, Arch. Microbiol. 156:5-14, 1991), was studied for its alkane degradation mechanism by using deuterium and 13C-labeled compounds. Deuterated fatty acids with even numbers of C atoms (C-even) and 13C-labeled fatty acids with odd numbers of C atoms (C-odd) were recovered from cultures of Hxd3 grown on perdeuterated pentadecane and [1,2-13C2]hexadecane, respectively, underscoring evidence that C-odd alkanes are transformed to C-even fatty acids a
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5

Jarjis, Hayfa M., and Salim M. Khalil. "MINDO-Forces Study of Methyl Substituted Allyl Cations." Zeitschrift für Naturforschung A 42, no. 2 (1987): 174–80. http://dx.doi.org/10.1515/zna-1987-0210.

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MINDO-Forces calculations have been performed on methyl substituted allyl cations with complete energy minimization. It was found that the methyl substitution on the terminal carbon atoms of the allyl cation stabilizes the cation more than that at the center carbon atom. Also, the stability of the cation depends on the conformation of the cation and not on the number of methyl substituents.
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6

Kalo, Mabintou, Fatogoma Diarrassouba, Demel Axel Adou, Kafoumba Bamba, and Nahossé Ziao. "Investigating Global Reactivity Profiles and Key Reactive Sites of Eight Tetracyanoquinodimethane Derivatives: A Computational Study Using B3LYP/6-311G(d,p) theory level." Chemical Science International Journal 33, no. 3 (2024): 35–47. http://dx.doi.org/10.9734/csji/2024/v33i3893.

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In this work, it was a question of carrying out a theoretical study of the global reactivity and a characterization of the preferential sites of reactivity of eight (08) derivatives of Tetracyanoquinodimethane (TCNQ). It emerges from this study that the oxidizing power of the eight (08) molecules increases with the electrophilic character and electro-acceptor power. In terms of local reactivity, in general, nucleophilicity concerns terminal nitrogen atoms. Electrophilicity concerns the central ring carbon atoms of analogous TCNQ.
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7

Jarosz, S., and M. Mach. "ChemInform Abstract: Synthesis of Sucrose Derivatives Modified at the Terminal Carbon Atoms." ChemInform 30, no. 36 (2010): no. http://dx.doi.org/10.1002/chin.199936249.

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8

Tun Nur Iskandar, Nur Amanina Juniasari, Yeap Guan-Yeow, Nobuyuki Maeta, et al. "Anisotropic and magnetic properties in non-metal and non-radical organic aggregates of tri-substituted phenyl derivatives." New Journal of Chemistry 44, no. 1 (2020): 210–17. http://dx.doi.org/10.1039/c9nj02730k.

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A new series of tri-substituted phenyl derivatives containing an aromatic imine unit and biphenyl ester possessing various numbers of carbon atoms at the terminal alkoxy chain, OC<sub>n</sub>H<sub>2n+1</sub> (n = 7–12), along with a lateral o-ethoxy substituent.
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9

Best, WM, and D. Wege. "Intramolecular Diels-Alder Additions of Benzynes to Furans. Exploratory Studies." Australian Journal of Chemistry 39, no. 4 (1986): 635. http://dx.doi.org/10.1071/ch9860635.

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A series of 3-alkoxyanthranilic acids, in which a furan ring is attached to the terminal carbon atom of the alkoxy group, has been prepared. When the chain linking the anthranilic acid and furan ring systems is three or four atoms long, decomposition of the derived diazonium chlorides generates the corresponding benzynes , which are efficiently trapped intramolecularly by the furan moiety. Diazotization of 2-amino-3-furfuryloxybenzoic acid, where the linking chain is two atoms long, results in fragmentation with the formation of 6-diazo-5- oxocyclohexa-1,3-diene-1-carboxylic acid.
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10

Bennett, Martin A., Nedaossadat Mirzadeh, Steven H. Privér, Jörg Wagler, and Suresh K. Bhargava. "Trinuclear Mixed-valent Gold Complexes Derived from 2-C6F4PPh2: Phosphine Oxide Complexes of Gold(III) and an ortho-Metallated Complex of Gold(I)." Zeitschrift für Naturforschung B 64, no. 11-12 (2009): 1463–68. http://dx.doi.org/10.1515/znb-2009-11-1229.

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Crystals of two mixed-valent gold complexes [(O2NO)AuI(μ-2-C6F4PPh2)AuIII{κ2-2-C6- F4P(O)Ph2}(μ-2-C6F4PPh2)AuI(ONO2)] (14) and [(O2NO)AuI(μ-2-C6F4PPh2)AuIII{κ3-2-C6F4- P(O)Ph(C6H4)}(μ-2-C6F4PPh2)AuI] (15) have been obtained from the reaction of the digold(I,III) complex [ClAuI(μ-2-C6F4PPh2)(κ2-2-C6F4PPh2)AuIIICl] (5) with, respectively, a small and a large excess of silver nitrate. Both complexes contain three, approximately collinear metal atoms, the central gold(III) atom being planar-coordinated by a chelate (O,C)-phosphine oxide formed by oxidation of 2-C6F4PPh2 and the carbon atoms of two
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Book chapters on the topic "Terminal Carbon Atoms"

1

Davis, Benjamin G., and Antony J. Fairbanks. "Open chain and ring structure of monosaccharides." In Carbohydrate Chemistry. Oxford University Press, 2002. http://dx.doi.org/10.1093/hesc/9780198558330.003.0002.

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This chapter analyzes the empirical formula CH<sub>2</sub>O, which is the formula of a carbohydrate. This molecule has an oxygen atom attached to each carbon. The chapter states that aldose is the most common type of structure which consists of a linear carbon chain with an aldehyde CHO group at C-1. A varying number of carbon atoms are secondary alcohols CHOH, and there is a primary alcohol at the other end of the chain. The chapter also mentions glyceraldehyde as an example of aldose consisting of several carbons. The chapter explains the Fischer convention which is commonly used for structu
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2

Dalton, David R. "The Leaf." In The Chemistry of Wine. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190687199.003.0016.

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Grape leaves are thin and flat. As is common among leaves in general, they are composed of different sets of specialized cells. Today, on average, sunlight reaching their surface is about 4% ultraviolet (UV) (&lt;400 nm), 52% infrared (IR) (&gt;750 nm) and 44% visible (VIS) radiation. Little of the UV and IR are used by plants. As with other leaves that are green, only the red and blue ends of the visible part of the electromagnetic spectrum are absorbed, thus leaving green available by reflection and transmission. On the surface of the leaf (Figure 8.1), the cells of the outermost layer (the
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3

Escudero, J., and T. Besset. "4 Cross-Dehydrogenative Coupling Involving Alkynes for C(sp2)—C(sp) Bond Formation." In Cross-Dehydrogenative Coupling. Georg Thieme Verlag KG, 2023. http://dx.doi.org/10.1055/sos-sd-240-00107.

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AbstractCross-dehydrogenative coupling reactions represent one of the most environmentally friendly and atom-economic strategies to achieve carbon–carbon or carbon–heteroatom bond formation from non-prefunctionalized substrates, formally producing only dihydrogen as waste. Using terminal alkynes as one of the coupling partners in cross-dehydrogenative couplings, the sustainable synthesis of a myriad of alkynylated compounds is possible. In this review, the major advances in cross-dehydrogenative couplings involving alkynes are covered, with a focus on the formation of C(sp2)—C(sp) bonds, leadi
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4

Podlech, J. "Oxidation at the Terminal Carbon Atom of an Alk-1-ene." In Aldehydes. Georg Thieme Verlag KG, 2007. http://dx.doi.org/10.1055/sos-sd-025-00023.

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5

"Vitamin B5: Pantothenate." In The Chemical Biology of Human Vitamins. The Royal Society of Chemistry, 2018. http://dx.doi.org/10.1039/bk9781788014649-00161.

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Vitamin B5 is the simple acid pantothenic acid (from the Greek pantos, meaning widespread). B5 needs to undergo five enzymatic steps to be converted to coenzyme A, in which the terminal thiol of a cysteamine moiety is the key reactive atom, once dissociated to the thiolate anion. The thiolate serves as nucleophile towards a variety of acids to yield acyl thioesters (acyl-CoAs). These are the cellular acylating agents in metabolic pathways. The two-carbon acyl group in acetyl CoA is doubly activated: as electrophile at C1 and as nucleophile at C2, and so ideally set up for C–C bond formations i
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Conference papers on the topic "Terminal Carbon Atoms"

1

Alshammari, Salem. "Understanding Retrograde Gas Condensation: A Molecular Perspective." In SPE Advances in Integrated Reservoir Modelling and Field Development Conference and Exhibition. SPE, 2025. https://doi.org/10.2118/225406-ms.

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Abstract Retrograde gas condensation is an intriguing and seemingly counterintuitive phase behavior phenomenon in which gas condenses as pressure decreases at certain conditions and fluid compositions. This work aims to provide an explanation that bridges the gap between phenomenological observations and microscopic mechanisms using thermodynamic modeling and molecular dynamics (MD) simulation. Phase envelopes for a selection of binary hydrocarbon mixtures have been generated and compared with experimental results using the Peng Robinson (PR) equation of state (EoS). After capturing key featur
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2

Kuznetsova, A. A., and D. P. Porfiriev. "Theoretical study of the reaction of 1-acenaphthyl with molecular oxygen." In 51-st All-Russian with international participation student scientific conference "Physics of Space". Ural University Press, 2024. http://dx.doi.org/10.15826/b978-5-7996-3848-1.53.

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In this paper we present the results of a quantum-chemical study of the potential energy surface of the oxidation reaction of 1-acenaphthyl with molecular oxygen. The results were obtained at the G3(MP2,CC)//B3LYP/6-311G(d,p) level of theory. This approach provides chemical accuracy of relative energies and molecular parameters. Por the studied reaction pathways, the values of rate constants were calculated for various external conditions within the framework of the RRKM-ME theory with kinetic accuracy and the branching ratios of the reaction products were obtained. Analysis of the results sho
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