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Journal articles on the topic 'Halogen compounds'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Cavallo, Gabriella, Jane S. Murray, Peter Politzer, Tullio Pilati, Maurizio Ursini, and Giuseppe Resnati. "Halogen bonding in hypervalent iodine and bromine derivatives: halonium salts." IUCrJ 4, no. 4 (2017): 411–19. http://dx.doi.org/10.1107/s2052252517004262.

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Halogen bonds have been identified in a series of ionic compounds involving bromonium and iodonium cations and several different anions, some also containing hypervalent atoms. The hypervalent bromine and iodine atoms in the examined compounds are found to have positive σ-holes on the extensions of their covalent bonds, while the hypervalent atoms in the anions have negative σ-holes. The positive σ-holes on the halogens of the studied halonium salts determine the linearity of the short contacts between the halogen and neutral or anionic electron donors, as usual in halogen bonds.

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2

Magaji, Amayindi, Yakubu Joel, Yakubu Onimisi Jimoh, and Dorcas Kaduna Rubiyamisumma. "Interstellar Halogen and Biochemical Application of Halogen Bond in Living System." medtigo Journal of Pharmacology 2, no. 2 (2025): e3061221. https://doi.org/10.63096/medtigo3061221.

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Certain class of compound that consist of one halogen (F, Cl, Br, I or At) linked directly to a carbon atom, they are generally known as organo-halogens, they are present on the earth in abundance because they are largely manufactured through biological and industrial courses. Therefore, they have been suggested as bio-signature in the quest for life in the interstellar space. Less complex halogen hydrides had been identified in comets and astrochemical sources, nevertheless the occurrence and conceivable incorporation of advanced complex halides comprising compounds such as organo-halogens in

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3

Poynder, Tiffany B., Dharmeshkumar P. Savaliya, Andrew Molino, David J. D. Wilson, and Jason L. Dutton. "Elimination of Ethene from 1,2-Diiodoethane Induced by N-Heterocyclic Carbene Halogen Bonding." Australian Journal of Chemistry 72, no. 8 (2019): 614. http://dx.doi.org/10.1071/ch19237.

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The attempted synthesis of N-heterocyclic carbene (NHC)-stabilised dicarbon (C2) fragments via nucleophilic substitution at 1,2-diiodoethane is reported. Rather than the expected SN2 pathway, clean elimination of ethene and formation of an iodoimidazolium cation was observed. The resistance towards nucleophilic substitution piqued interest, and subsequent investigation determined NHC-halogen bonding as the source. This is in contrast to reactions between NHCs and other alkyl halides, where substitution or elimination pathways are reported. A detailed theoretical study between these cases highl

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4

Matsuo, Kazuki, Tadashi Yoshitake, Eiji Yamaguchi та Akichika Itoh. "Photoinduced Atom Transfer Radical Addition/Cyclization Reaction between Alkynes or Alkenes with Unsaturated α-Halogenated Carbonyls". Molecules 26, № 22 (2021): 6781. http://dx.doi.org/10.3390/molecules26226781.

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We have developed a photochemical ATRA/ATRC reaction that is mediated by halogen bonding interactions. This reaction is caused by the reaction of malonic acid ester derivatives containing bromine or iodine with unsaturated compounds such as alkenes and alkynes in the presence of diisopropylethylamine under visible light irradiation. As a result of various control experiments, it was found that the formation of complexes between amines and halogens by halogen-bonding interaction occurs in the reaction system, followed by the cleavage of the carbon–halogen bonds by visible light, resulting in th

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5

Dohi, Toshifumi. "Recent Topics in Organohalogen Reagents and Compounds." Current Organic Chemistry 24, no. 18 (2020): 2029–30. http://dx.doi.org/10.2174/138527282418201106141610.

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This Special Issue covers the hot topics on recent synthetic interest in halogen and related chemistry as well as the unique characteristics of halogen compounds. The excellent reviews by the experts and eminent researchers engaged in the recent advances, i.e., preparations, reactions, and mechanistic studies of unique organohalogen compounds, halogen bond interaction as the catalysis, and halogen-controlled unique reactions for synthesizing useful organic molecules, such as pharmaceutical compounds and organic materials, are provided in this Special Issue.

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6

Parlak, Cemal, Mahir Tursun, Chandraju Sadolalu Chidan Kumar, et al. "Halogen and solvent effects on the conformational, vibrational and electronic properties of 1,4-diformylpiperazine: A combined experimental and DFT study." Journal of Theoretical and Computational Chemistry 14, no. 07 (2015): 1550050. http://dx.doi.org/10.1142/s0219633615500509.

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The molecular structure and properties of 1,4-diformylpiperazine (1,4-dfp, C6H[Formula: see text]N2O2) were investigated by Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy and density functional theory (DFT). The Becke-3-Lee–Yang–Parr (B3LYP) functional was used with the 6-31[Formula: see text]G(d,p) basis set. Total energy distribution (TED) analysis of normal modes was performed to identify characteristic frequencies by the scaled quantum mechanical (SQM) method. Halogeno-analogs of 1,4-dfp were studied to understand the halogen effect. Computations were focused on five c

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7

Nikitin, Igor V. "Oxygen compounds of halogens X2O2(X is a halogen atom)." Russian Chemical Reviews 71, no. 2 (2002): 85–97. http://dx.doi.org/10.1070/rc2002v071n02abeh000684.

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8

Rossi, Laura I., and Manuel I. Velasco. "Alternatives to free molecular halogens as chemoselective reactants: Catalysis of organic reactions with reusable complexes of halogen metal salts." Pure and Applied Chemistry 84, no. 3 (2012): 819–26. http://dx.doi.org/10.1351/pac-con-11-07-13.

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Organometallic complexes of halogen metallic salts have been used as catalysts in different organic reactions, mainly the oxidation of organic compounds. Their use has not only allowed the reduction of the amounts of catalyst (since they can be reused) but also a lower generation of byproducts and wastes. The different reaction media developed through the research were analyzed by several green parameters, and the best results were obtained with complexes that have cyclodextrins as organic ligands. The proposed methodology is an alternative to use of molecular halogen as oxidant or catalyst wh

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9

China, Hideyasu, Ravi Kumar, Kotaro Kikushima, and Toshifumi Dohi. "Halogen-Induced Controllable Cyclizations as Diverse Heterocycle Synthetic Strategy." Molecules 25, no. 24 (2020): 6007. http://dx.doi.org/10.3390/molecules25246007.

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In organic synthesis, due to their high electrophilicity and leaving group properties, halogens play pivotal roles in the activation and structural derivations of organic compounds. Recently, cyclizations induced by halogen groups that allow the production of diverse targets and the structural reorganization of organic molecules have attracted significant attention from synthetic chemists. Electrophilic halogen atoms activate unsaturated and saturated hydrocarbon moieties by generating halonium intermediates, followed by the attack of carbon-containing, nitrogen-containing, oxygen-containing,

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10

Gil, Aleksander, Zbigniew Żurek, Adam Stawiarski, and Jarosław Dąbek. "Improvement of Oxidation Resistance of TiAl-Nb Alloy by Dipping in F-Containing Resin." Advanced Materials Research 347-353 (October 2011): 3514–17. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.3514.

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Surface treatment of TiAl alloys by the small amounts of halogens leads to the formation of the protective alumina scale. The halogens can be applied by ion techniques as well as by spraying or dipping with halogen-containing compounds. In this work the results of the oxidation in air of a Ti-47Al-6Nb alloy dipped in a fluorine-containing resin were presented. The thermal cycling runs were carried out in the temperature 900°C.

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11

Khavasi, Hamid Reza, and Maryam Esmaeili. "Temperature-dependent halogen⋯halogen synthon crossover in coordination compounds." CrystEngComm 16, no. 36 (2014): 8479–85. http://dx.doi.org/10.1039/c4ce00692e.

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12

Green, Joseph. "Mechanisms for Flame Retardancy and Smoke suppression -A Review." Journal of Fire Sciences 14, no. 6 (1996): 426–42. http://dx.doi.org/10.1177/073490419601400602.

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The prevailing mechanisms for halogen and phosphorus flame retardancy are reviewed. Halogens act in the vapor phase and phosphorus can act in either the vapor or condensed phase depending on the specific phos phorus compound and the chemical composition of the polymer. Halogen- antimony synergy is discussed. Convincing evidence is presented for bromine- phosphorus synergy in specific polymers. The mode of decomposition of polycarbonate is shown and the effect of salts of organic acids in changing the mode of decomposition hence producing a more flame resistant polymer is shown. Intumescence in

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13

Włodarczyk-Makuła, Maria, and Ewa Wiśniowska. "Halogenated Organic Compounds in Water and in Wastewater." Civil and Environmental Engineering Reports 29, no. 4 (2019): 236–47. http://dx.doi.org/10.2478/ceer-2019-0057.

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Abstract Currently, organic halogen compounds (halogen derivatives) are often identified in water. The paper presents the problem of the presence of these newly formed compounds during water treatment processes and their occurrence in sewage. The general indicator determining the content of these compounds in aqueous solutions is the concentration of halogen derivatives of organic compounds adsorbed on activated carbon AOX, which is converted to the concentration of chlorides. The groups of derivatives of halogenated organic compounds containing chlorine and/or bromine in a molecule were chara

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14

Podsiadło, Marcin, and Andrzej Katrusiak. "Halogen- versus Hydrogen-Bonds Aggregation and Competition at High Pressure." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C666. http://dx.doi.org/10.1107/s2053273314093334.

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Halogen and hydrogen bonds [1] are most often associated with the structure of molecular crystals. Even weak specific interactions, such as halogen···halogen and CH···halogen contacts, can compete between themselves and with Kitaigorodski's close packing rule. The competition between halogen···halogen and CH···halogen interactions has been studied at high pressure for the series of six dihalomethanes CH2XY (X,Y = Cl, Br, I). They crystallize in several structural types of space groups Pbcn, C2/c, Pnma, Pna21or Fmm2. In all these compounds and in their polymorphs the halogen···halogen and CH···

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15

Bouillon, Jean-Philippe, Christian Maliverney, Robert Merényi, and Heinz G. Viehe. "Trifluoromethylation of aliphatic halogen compounds." J. Chem. Soc., Perkin Trans. 1, no. 9 (1991): 2147–49. http://dx.doi.org/10.1039/p19910002147.

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16

Stepin, B. D. "Compounds of the Halogen Cations." Russian Chemical Reviews 56, no. 8 (1987): 726–39. http://dx.doi.org/10.1070/rc1987v056n08abeh003301.

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17

LUTFI, H. G., and C. Y. MEYERS. "ChemInform Abstract: Positive Halogen Compounds." ChemInform 28, no. 9 (2010): no. http://dx.doi.org/10.1002/chin.199709283.

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18

Tan, Yi Lun, Liu Sun, Si Chun Shao, Jin Peng Fu, and Zhi Han Peng. "Synthesis and Characterization of Melamine Halogen Acid Salts and its Application as Flame Retardant." Advanced Materials Research 750-752 (August 2013): 1087–90. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.1087.

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In this paper, a series of novel halogen compounds, melamine halogen acid salts were directly synthesized by melamine and halogen acid in water phase. The chemical structures of melamine halogen acid salts were characterized by Fourier-transform infrared spectroscopy (FT-IR), elemental analysis and1H-NMR. Meanwhile, the thermal properties of compounds were investigated by thermogravimetric analysis (TGA). The TGA results showed that melamine halogen acid salts had good thermostability during polymer processing. Futhermore, limiting oxygen index (LOI) and vertical burning test were used to stud

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19

Lin, King-Chuen, and Po-Yu Tsai. "Molecular halogen elimination from halogen-containing compounds in the atmosphere." Physical Chemistry Chemical Physics 16, no. 16 (2014): 7184. http://dx.doi.org/10.1039/c3cp54828g.

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20

Gil, Aleksander, Zbigniew Żurek, and Adam Stawiarski. "Oxidation of TiAl Alloys Coated by Fluorine Resin in SO₂ Containing Atmosphere." Materials Science Forum 654-656 (June 2010): 562–65. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.562.

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There are several ways to improve the oxidation resistance of TiAl alloys. One of them is alloying with elements such as Nb, Ta, W, Si, Ag, Zr or Hf. However, bulk alloying influences the mechanical properties. Surface treatment of TiAl alloys by the small amounts of halogens leads to the formation of the protective alumina scale (“halogen effect”). The halogens can be applied by ion techniques (ion implantation, plasma immersion implantation) but also by spraying or dipping with halogen-containing inorganic and organic compounds. Deposition of the fluorine-containing resin on the surface of T

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21

Capozzi, Maria Annunziata M., Angel Alvarez-Larena, Joan F. Piniella Febrer, and Cosimo Cardellicchio. "A combined structural and computational investigation of aminobenzylnaphthol compounds derived from the Betti reaction using valine methyl ester." New Journal of Chemistry 45, no. 44 (2021): 20735–42. http://dx.doi.org/10.1039/d1nj03538j.

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22

Rajakumar, K., D. A. Zherebtsov, S. А. Nayfert, A. А. Osipov, S. A. Adonin, and D. V. Spiridonova. "Structure of inorganic compounds halogen bonds in derivatives of 2,5-diiod-1,4-dimethylbenzene." Kristallografiâ 69, no. 4 (2024): 612–19. http://dx.doi.org/10.31857/s0023476124040062.

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The synthesis of 1,4-di(bromomethyl)-2,5-diiodo-benzene (1), diacetate of 2,5-diiodo–1,4-di(hydroxymethyl)benzene (2) and diiodide of 1,1’-[(2,5-diiodo-1,4-phenylene)bis(methylene)]dipyridinium (3) is described and their crystallographic data are given. All three crystal structures are characterized by the stacked packing of planar molecules and the presence of halogen bonds I–Br, I–O, and I–I, respectively. The number of halogen bonds is maximum in compound 1: two I–Br bonds for each halogen atom. Compounds 2 and 3 contain one halogen bond per halogen atom, but they are significantly shorter

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23

Biester, H., D. Selimović, S. Hemmerich, and M. Petri. "Halogens in porewater of peat bogs – the role of peat decomposition and dissolved organic matter." Biogeosciences Discussions 2, no. 5 (2005): 1457–86. http://dx.doi.org/10.5194/bgd-2-1457-2005.

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Abstract. Peatlands are one of the largest active terrestrial reservoirs of halogens. Formation of organo-halogens is a key process for the retention of halogens by organic matter and halogen enrichment in peat is strongly influenced by climatically controlled humification processes. However, little is known about release and transport of halogens in peat bogs. In this study we investigated the release of halogens from peat in three peat bogs located in the Magellanic Moorlands, southern Chile. Peat porewaters were collected using a sipping technique, which allows in situ sampling down to a de

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24

Montgomery, Carlee A., and Graham K. Murphy. "Exploring the role of halogen bonding in iodonium ylides: insights into unexpected reactivity and reaction control." Beilstein Journal of Organic Chemistry 19 (August 7, 2023): 1171–90. http://dx.doi.org/10.3762/bjoc.19.86.

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Halogen bonding is commonly found with iodine-containing molecules, and it arises when Lewis bases interact with iodine’s σ-holes. Halogen bonding and σ-holes have been encountered in numerous monovalent and hypervalent iodine-containing compounds, and in 2022 σ-holes were computationally confirmed and quantified in the iodonium ylide subset of hypervalent iodine compounds. In light of this new discovery, this article provides an overview of the reactions of iodonium ylides in which halogen bonding has been invoked. Herein, we summarize key discoveries and mechanistic proposals from the early

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25

Caram, Cyril, Sophie Szopa, Anne Cozic, Slimane Bekki, Carlos A. Cuevas, and Alfonso Saiz-Lopez. "Sensitivity of tropospheric ozone to halogen chemistry in the chemistry–climate model LMDZ-INCA vNMHC." Geoscientific Model Development 16, no. 14 (2023): 4041–62. http://dx.doi.org/10.5194/gmd-16-4041-2023.

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Abstract. The atmospheric chemistry of halogenated species (Cl, Br, I) participates in the global chemical sink of tropospheric ozone and perturbs the oxidising capacity of the troposphere, notably by influencing the atmospheric lifetime of methane. Global chemistry–climate models are commonly used to assess the global budget of ozone and its sensitivity to emissions of its precursors, as well as to project its long-term evolution. Here, we report on the implementation of tropospheric sources and chemistry of halogens in the chemistry–climate model LMDZ-INCA (Laboratoire de Météorologie Dynami

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26

Guthrie, J. Peter, and Igor Povar. "A test of various computational solvation models on a set of “difficult” organic compounds." Canadian Journal of Chemistry 87, no. 8 (2009): 1154–62. http://dx.doi.org/10.1139/v09-071.

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Various dielectric continuum models in Gaussian 03, based on the SCRF approach, PCM, CPCM, DPCM, IEFPCM, IPCM, and SCIPCM, have been tested on a set of 54 highly polar, generally polyfunctional compounds for which experimental solvation energies are available. These compounds span a range of 13 kcal/mol in ΔGt. The root-mean-square (RMS) errors for the full set of compounds range from 2.48 for DPCM to 1.77 for IPCM. For each method, classes of compounds which were not handled well could be identified. If these classes of compounds were omitted, the performance improved, and ranged from 1.58 (P

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27

Klipkov, Anton A., and Igor I. Gerus. "Electrophilic Reactions of 7-(Trifluoromethyl)-2,3-dihydro- 1H-pyrrolizine: a Way Towards New Building Blocks." Journal of Organic and Pharmaceutical Chemistry 21, no. 2 (2023): 36–40. http://dx.doi.org/10.24959/ophcj.23.284640.

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Aim. To synthesize new fluoro-containing building blocks for medicinal chemistry purposes using electrophilic reactions of 7-(trifluoromethyl)-2,3-dihydro-1H-pyrrolizine.Results and discussion. Synthetic approaches to 5-halogeno- and 5-acyl-7-(trifluoromethyl)-2,3-dihydro-1H-pyrrolizines have been developed. The obtained new trifluoromethyl-containing pyrrolyzines are promising building blocks for medicinal chemistry.Experimental part. The synthesis of the target compounds began with known 7-(trifluoromethyl)-2,3-dihydro-1H-pyrrolizine and included halogenation and acylation reactions using N-

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28

Nikitin, I. V. "ChemInform Abstract: Oxygen Compounds of Halogens X2O2 (X Is a Halogen Atom)." ChemInform 33, no. 30 (2010): no. http://dx.doi.org/10.1002/chin.200230267.

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29

Yamada, Shigeyuki, and Tsutomu Konno. "Recent Advances in Halogen Bond-assisted Organic Synthesis." Current Organic Chemistry 24, no. 18 (2020): 2118–52. http://dx.doi.org/10.2174/1385272823666191209112543.

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Halogen bond interactions, which take place between an electrophilic halogen and the electron-pair of a Lewis base and exhibit high directionality (approximately 180°), are non-covalent bond interactions similar to the hydrogen bond interaction. Many reports on halogen bond interactions have been published thus far, but many of them discuss halogen bond in the context of crystal engineering of supramolecular architecture. Since a seminal report by Bolm in 2008, halogen bond-assisted or -promoted organic synthesis has received significant attention. This review aims to introduce the molecular d

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30

Chen, Yinjie, Haifeng Yu, Lanying Zhang, Huai Yang, and Yunfeng Lu. "Photoresponsive liquid crystals based on halogen bonding of azopyridines." Chem. Commun. 50, no. 68 (2014): 9647–49. http://dx.doi.org/10.1039/c4cc02344g.

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A series of photoresponsive halogen-bonded liquid crystals (LCs) were successfully constructed using molecular halogen and azopyridine compounds, which show interesting properties of photoinduced phase transition upon UV irradiation.

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31

Zhang, Luyan, Yanru Li, Long-Yi Jin, and Fushun Liang. "Metal-free C–N cross-coupling of electrophilic compounds and N-haloimides." RSC Advances 5, no. 80 (2015): 65600–65603. http://dx.doi.org/10.1039/c5ra13708j.

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32

Jelsch, Christian, Sarra Soudani, and Cherif Ben Nasr. "Likelihood of atom–atom contacts in crystal structures of halogenated organic compounds." IUCrJ 2, no. 3 (2015): 327–40. http://dx.doi.org/10.1107/s2052252515003255.

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The likelihood of occurrence of intermolecular contacts in crystals of halogenated organic compounds has been analysed statistically using tools based on the Hirshfeld surface. Several families of small halogenated molecules (containing organic F, Cl, Br or I atoms) were analysed, based on chemical composition and aromatic or aliphatic character. The behaviour of crystal contacts was also probed for molecules containing O or N. So-called halogen bonding (a halogen making short interactions with O or N, or a π interaction with C) is generally disfavoured, except when H is scarce on the molecula

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33

Cai, Yuanting, Yuhui Hua, Zhengyu Lu, et al. "Electrophilic aromatic substitution reactions of compounds with Craig-Möbius aromaticity." Proceedings of the National Academy of Sciences 118, no. 39 (2021): e2102310118. http://dx.doi.org/10.1073/pnas.2102310118.

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Electrophilic aromatic substitution (EAS) reactions are widely regarded as characteristic reactions of aromatic species, but no comparable reaction has been reported for molecules with Craig-Möbius aromaticity. Here, we demonstrate successful EAS reactions of Craig-Möbius aromatics, osmapentalenes, and fused osmapentalenes. The highly reactive nature of osmapentalene makes it susceptible to electrophilic attack by halogens, thus osmapentalene, osmafuran-fused osmapentalene, and osmabenzene-fused osmapentalene can undergo typical EAS reactions. In addition, the selective formation of a series o

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34

Gribble, Gordon W. "A recent survey of naturally occurring organohalogen compounds." Environmental Chemistry 12, no. 4 (2015): 396. http://dx.doi.org/10.1071/en15002.

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Environmental context The general perception that nature does not produce compounds containing halogens – chlorine, bromine, iodine and fluorine – is now known to be erroneous. Modern isolation and identification techniques have led to the discovery of more than 5000 halogen-containing compounds from myriad marine and terrestrial plant and animal sources. Many of these compounds possess extraordinary biological activity, including anticancer, antiviral and antibacterial activity of potential human benefit. Abstract This short review presents the naturally occurring organohalogen compounds disc

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35

Sanchis-Perucho, Adrián, Marta Orts-Arroyo, Nicolas Moliner, and José Martínez-Lillo. "Effect of the Solvent on the Crystallographic and Magnetic Properties of Rhenium(IV) Complexes Based on 2,2′-Bipyrimidine Ligand." Inorganics 11, no. 2 (2023): 78. http://dx.doi.org/10.3390/inorganics11020078.

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Two solvated rhenium(IV) complexes with formula [ReCl4(bpym)]·MeCN (1) and [ReCl4(bpym)]·CH3COOH·H2O (2) (bpym = 2,2′-bipyrimidine) have been prepared and characterized by means of Fourier transform infrared spectroscopy (FT–IR), scanning electron microscopy and energy dispersive X-ray analysis (SEM–EDX), single-crystal X-ray diffraction (XRD) and SQUID magnetometer. 1 and 2 crystallize in the monoclinic system with space groups P21/n and P21/c, respectively. In both compounds, the Re(IV) ion is six-coordinate and bound to four chloride ions and two nitrogen atoms of a 2,2′-bipyrimidine molecu

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36

Mei, Lei, Cong-zhi Wang, Lin Wang, Yu-liang Zhao, Zhi-fang Chai, and Wei-qun Shi. "Halogen Bonded Three-Dimensional Uranyl–Organic Compounds with Unprecedented Halogen–Halogen Interactions and Structure Diversity upon Variation of Halogen Substitution." Crystal Growth & Design 15, no. 3 (2015): 1395–406. http://dx.doi.org/10.1021/cg501783d.

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37

Fortea-Pérez, Francisco Ramón, Nadia Marino, Giovanni de Munno, Donatella Armentano, Miguel Julve, and Salah-Eddine Stiriba. "Intermolecular interactions in dictating the self-assembly of halogen derivatives of bis-(N-substituted oxamato)palladate(ii) complexes." RSC Advances 6, no. 8 (2016): 6164–70. http://dx.doi.org/10.1039/c5ra25136b.

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The reaction of aqueous [PdCl<sub>4</sub>]<sup>2−</sup>withN-4-Xphenyloxamate ligands (X = F, Cl, Br) afforded three non-isostructural compounds exhibiting intriguing diverse supramolecular assemblies driven by hydrogen bonds and/or halogen⋯halogen interactions.

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38

Lehrer, E., G. Hönninger, and U. Platt. "The mechanism of halogen liberation in the polar troposphere." Atmospheric Chemistry and Physics Discussions 4, no. 3 (2004): 3607–52. http://dx.doi.org/10.5194/acpd-4-3607-2004.

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Abstract. Sudden depletions of tropospheric ozone during spring were reported from the Arctic and also from Antarctic coastal sites. Field studies showed that those depletion events are caused by reactive halogen species, especially bromine compounds. However the source and seasonal variation of reactive halogen species is still not completely understood. There are several indications that the halogen mobilisation from the sea ice surface of the polar oceans may be the most important source for the necessary halogens. Here we present a 1-D model study aimed at determining the primary source of

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39

Gargala, Gilles, Laetitia Le Goff, Jean-Jacques Ballet, Loic Favennec, Andrew V. Stachulski, and Jean-François Rossignol. "Evaluation of New Thiazolide/Thiadiazolide Derivatives Reveals Nitro Group-Independent Efficacy against In Vitro Development of Cryptosporidium parvum." Antimicrobial Agents and Chemotherapy 54, no. 3 (2010): 1315–18. http://dx.doi.org/10.1128/aac.00614-09.

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ABSTRACT Thirty-nine new thiazolide/thiadiazolide compounds were compared with the nitrothiazole nitazoxanide for activity against Cryptosporidium parvum development in HCT-8 cells. Twenty-seven agents exerted ≥90% inhibition. Agents with a lower 50% inhibitory concentration (IC50) than nitazoxanide were either NO2 or halogen 5 substituted on the thiazole moiety. Other 5 substitutions such as methyl, C3H7, C6H11, H, SO2CH3, and SCH3 negatively impacted activity. Five-substituted deacetylated analogues exhibited higher IC50s than their acetylated counterparts. Halogeno-thiazolide/thiadiazolides

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40

Saiz-Lopez, Alfonso, Rafael P. Fernandez, Qinyi Li, et al. "Natural short-lived halogens exert an indirect cooling effect on climate." Nature 618, no. 7967 (2023): 967–73. http://dx.doi.org/10.1038/s41586-023-06119-z.

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AbstractObservational evidence shows the ubiquitous presence of ocean-emitted short-lived halogens in the global atmosphere1–3. Natural emissions of these chemical compounds have been anthropogenically amplified since pre-industrial times4–6, while, in addition, anthropogenic short-lived halocarbons are currently being emitted to the atmosphere7,8. Despite their widespread distribution in the atmosphere, the combined impact of these species on Earth’s radiative balance remains unknown. Here we show that short-lived halogens exert a substantial indirect cooling effect at present (−0.13 ± 0.03 w

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Lehrer, E., G. Hönninger, and U. Platt. "A one dimensional model study of the mechanism of halogen liberation and vertical transport in the polar troposphere." Atmospheric Chemistry and Physics 4, no. 11/12 (2004): 2427–40. http://dx.doi.org/10.5194/acp-4-2427-2004.

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Abstract. Sudden depletions of tropospheric ozone during spring were reported from the Arctic and also from Antarctic coastal sites. Field studies showed that those depletion events are caused by reactive halogen species, especially bromine compounds. However the source and seasonal variation of reactive halogen species is still not completely understood. There are several indications that the halogen mobilisation from the sea ice surface of the polar oceans may be the most important source for the necessary halogens. Here we present a one dimensional model study aimed at determining the prima

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Britsun, Vasyl M., Nataliya V. Simurova, Inna V. Popova, and Oleksii V. Simurov. "Modern chemical disinfectants and antiseptics. Part I." Journal of Organic and Pharmaceutical Chemistry 19, no. 3(75) (2021): 3–14. http://dx.doi.org/10.24959/ophcj.21.231997.

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Aim. To generalize and systematize information on the properties of modern chemical disinfectants and antiseptic agents (DA and AA).Results and discussion. The review provides generalized and systematized information on the properties of modern chemical DA and AA – alkylating reagents, aldehydes, amides, amidines, bisguanidines, dyes, halogenated reagents, halogens and their complexes, 2-nitrofuran derivatives. The classification of DA and AA by their chemical structure was carried out. The activity spectra, possible application ways and forms of DA and AA were given. Their toxicity and impact

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Malkanduev, Yusuf A., Madina B. Begieva, Aneta A. Kokoeva, Muslim A. Mikitaev, Аblulakhat T. Dzhalilov, and Madzera K. Vindizheva. "Synthesis and Properties of Polymers Based on N-Vinyl-Pyrrolidone and Halogen-Containing Compounds of Acrylic Acids." Key Engineering Materials 869 (October 2020): 303–7. http://dx.doi.org/10.4028/www.scientific.net/kem.869.303.

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The paper presents the results of the copolymerization of α-halogens of acrylic acid and N-vinylpyrrolidone in the presence of a radical initiator. The copolymerization equations are presented and activity factors are calculated. IR spectra of the obtained copolymers confirm the amination reaction. The synthesized aminated polymers form intramuscular compounds with divalent metal halides at room temperature. The kinetics of the copolymerization reaction of these systems shows that the presence of a reactive halogen atom in the structure of the copolymer has a great influence on the formation a

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Mathew, Bijo, Simone Carradori, Paolo Guglielmi, Md Sahab Uddin, and Hoon Kim. "New Aspects of Monoamine Oxidase B Inhibitors: The Key Role of Halogens to Open the Golden Door." Current Medicinal Chemistry 28, no. 2 (2020): 266–83. http://dx.doi.org/10.2174/0929867327666200121165931.

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A large plethora of drugs and promising lead compounds contain halogens in their structures. The introduction of such moieties strongly modulates their physical-chemical features as well as pharmacokinetic and pharmacodynamic profile. The most important outcome was shown to be the ability of these halogens to favourably influence the drug-target interaction and energetic stability within the active site by the establishment of halogen bonds. This review attempted to demonstrate the key role exerted by these versatile moieties when correctly located in an organic scaffold to display Monoamine O

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Weise, Jörg, Birgit Uhrlaub, Dirk Lehmhus, Joachim Baumeister, Kerstin Hantzsche, and Karsten Thiel. "Feasibility Study on the Generation of Nanoporous Metal Structures by Means of Selective Alloy Depletion in Halogen-Rich Atmospheres." Materials 17, no. 2 (2024): 498. http://dx.doi.org/10.3390/ma17020498.

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A new approach to produce nanoporous metals has been investigated, which is based on the dealloying of bi- or multi-component alloys. Depletion and pore formation of the alloy substrate are obtained by the transport of certain alloy components at high temperatures via volatile halogen compounds. These halogen compounds are transferred to materials acting as sinks based on their higher affinity to the respective components, and chemically bound there. Transfer via volatile halogen compounds is known from the pack cementation coating process and from high-temperature corrosion in certain industr

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MacCuaig, William M., Carly Wickizer, Maged Henary, et al. "Abstract 2379: Tunable squaraine dyes as contrast agents for image guided surgery with optoacoustic imaging." Cancer Research 83, no. 7_Supplement (2023): 2379. http://dx.doi.org/10.1158/1538-7445.am2023-2379.

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Abstract Surgical removal of cancers results in the most favorable patient outcomes. Resection margins may be tumor-positive in up to 70% of cases depending on cancer type, representing an unmet clinical need. Image-guided surgery often utilizes fluorescent dyes such as IR 800CW, but are limited to 8mm of depth and result in potential false-positive signal due to high blood binding. To overcome limitations, we are developing new contrast agents for Multispectral optoacoustic tomography (MSOT)-guided surgery to allow for greater depth of penetration and future potential of multiplexing of agent

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Feshin, Valentin P., Peter A. Nikitin, and Ismail A. Aliev. "79,81Br NQR Spectra of Alkyl(4-Bromophenyl)Sulphides." Zeitschrift für Naturforschung A 49, no. 4-5 (1994): 639–41. http://dx.doi.org/10.1515/zna-1994-4-520.

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Abstract The 79,81Br NQR spectra of compounds of the series 4-BrC6H4SR with R = (CH2)nH (n = 1, 2, 4-9), (CH2)nCH(CH3)2 (n = 0-2) and CHm(CH3)3-m were obtained at 77 K. The halogen atom electron densities in these compounds and chlorine-containing analogs are compared. The ratio of the amplitudes of the NQR frequency oscillations in chlorine-and bromine-containing compounds with R = (CH2)nH corresponds to the ratio of the polarizabilities of 35Cl and 79Br. The variation of the alkyl groups R influences the electron distribution of the halogen atom.

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Kowalska, Kornelia, Damian Trzybiński, and Artur Sikorski. "Influence of the halogen substituent on the formation of halogen and hydrogen bonding in co-crystals formed from acridine and benzoic acids." CrystEngComm 17, no. 37 (2015): 7199–212. http://dx.doi.org/10.1039/c5ce01321f.

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A series of nine co-crystals formed from acridine and benzoic acids have been synthesized and structurally characterized and the influence of the halogen substituent on the formation of halogen and hydrogen bonding in the co-crystals of the title compounds has been investigated.

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Dereka, Bogdan, Ina Fureraj, Arnulf Rosspeintner, and Eric Vauthey. "Halogen-Bond Assisted Photoinduced Electron Transfer." Molecules 24, no. 23 (2019): 4361. http://dx.doi.org/10.3390/molecules24234361.

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The formation of a halogen-bond (XB) complex in the excited state was recently reported with a quadrupolar acceptor–donor–acceptor dye in two iodine-based liquids (J. Phys. Chem. Lett. 2017, 8, 3927–3932). The ultrafast decay of this excited complex to the ground state was ascribed to an electron transfer quenching by the XB donors. We examined the mechanism of this process by investigating the quenching dynamics of the dye in the S1 state using the same two iodo-compounds diluted in inert solvents. The results were compared with those obtained with a non-halogenated electron acceptor, fumaron

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Jang, Bong-Jo, Sunnien Haam, and Myung-O. Yoon. "Comparison of Domestic and International Technical Standards: Study on Improvement of Quality Control of Halogenated Fire Extinguishing Agents." Fire Science and Engineering 35, no. 6 (2021): 37–44. http://dx.doi.org/10.7731/kifse.08944717.

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Recently, the National Fire Protection Association (NFPA) announced the revised standards for halogen compound fire extinguishing facilities (NFPA 2001). Characteristically, it is strengthening the quality control standards for halogenated fire extinguishing agents, by presenting specific standards regarding the effects of not only their main ingredient, but also their additional ingredients on the human body. However, in Korea, halogen compound fire extinguishing agents used for firefighting purposes are managed by designating “purity” as the sole criteria for inspection. Considering that hal

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