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857 Newest Publications about the topic bromine

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Continuum of Covalent to Intermolecular Bonding in the Halogen-Bonded Complexes of 1,4-Diazabicyclo[2.2.2]octane with Bromine-Containing Electrophiles

03-Jul-2018 | Craig Weinberger; Rachel Hines; Matthias Zeller; Sergiy Rosokha, Chemical Communication, 2018

A gradual change of Br···N bond lengths and strengths from the values typical for intermolecular associates to that characteristic of a covalent bond was observed in the series of the halogen-bonded complexes. This continuum reveals fundamental relationship between the limiting types of bonding ...

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Trihalide ionic liquids as non-volatile oxidizing solvents for metals

26-Jun-2018 | Arne Van den Bossche; Elise De Witte; Wim Dehaen; Koen Binnemans, Green Chemistry, 2018

Various ionic liquids containing a trihalide anion [X3]- (X = Cl, Br or I) were synthesized by addition of molecular chlorine, bromine or iodine (X2) to a halide ionic liquid precursor, forming the trihalide anion via a Lewis acid-base reaction. All ionic liquids were characterized by 1H NMR, 13C ...

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Combined LA-ICP-MS microanalysis of iodine, bromine and chlorine in fluid inclusions

30-May-2018 | Tobias Fusswinkel; Christopher Giehl; Oliver Beermann; Johan R. Fredriksson; Dieter Garbe-Schönberg; Lea Scholt ..., Journal of Analytical Atomic Spectrometry, 2018

Halogens are excellent tracers of hydrothermal fluid sources in sedimentary, magmatic, metamorphic and ore-forming environments. In situ LA-ICP-MS analysis of Cl and Br in single fluid inclusions has provided fundamentally new insight into the processes leading to the formation of economic ...

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The effects of bromine atoms on the photophysical and photochemical properties of 3-cinnamoylcoumarin derivatives

29-May-2018 | Zhiyuan Sun; Yu Wang; De-Cai Fang; Yuxia Zhao, New Journal of Chemistry, 2018

Eight coumarin derivatives (T1–T8) with or without modification using one or two bromine atoms were synthesized through the aldol condensation reaction. Their photophysical, photochemical and electrochemical properties were investigated. It was shown that the position and the number of bromine ...

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Lone Pair-[small pi] vs [sigma]-Hole-[small pi] Interactions in Bromine Head Containing Oxacalix[2]arene[2]triazines

29-May-2018 | Muhammad Moazzam Naseer; Antonio Bauza; Hazem Alnasar; Klaus Jurkschat; Antonio Frontera, CrystEngComm, 2018

Two new bromine head containing oxacalix[2]arene[2]triazines were designed and synthesized. Owing to the bromine head and complementary V-shaped cavity, the solid state structure of oxacalix[2]arene[2]triazine having N,N-dipropylamino substituents showed intriguing and unique 1D-supramolecular ...

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Negative 2D thermal expansion in the halogen bonded acetone bromine complex.

27-May-2018 | Richard Hywel Jones; Kevin Knight; William G. Marshall, CrystEngComm, 2018

The crystal structure of the complex formed between acetone and bromine has been determined between 14K and 200K. The structure exhibits negative 2D thermal expansion at low temperature and colossal thermal expansion in the perpendicular dimension. At low temperature the C=O bond is significantly ...

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Bromination and iodination of diphosphane dichalcogenides

26-May-2018 | Daniel Upmann; Peter G. Jones, Dalton Transactions, 2018

The diphosphane dichalcogenides dppmSe2, dppeSe2, diprpmSe2, diprpeSe2, dppmS2 and dppeS2, [dppm = bis(diphenylphosphano)methane, dppe = bis(diphenylphosphano)ethane, diprpm = bis(diisopropylphosphano)methane, diprpe = bis(diisopropylphosphano)ethane] have been treated with elemental bromine or ...

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Bromine-rich complexes of bismuth: experimental and theoretical studies

25-May-2018 | Sergey A. Adonin; Igor D. Gorokh; Alexander S. Novikov; Denis G. Samsonenko; Pavel E. Plyusnin; Maxim N. Sokolov; Vl ..., Dalton Transactions, 2018

Three novel polybromide complexes of bismuth(iii) – (2,6-MePyH)3[BiBr5(Br3)] (1), (H2bpp){[BiBr5](Br2)} (2) and (3-ClPyH)2{[BiBr5](Br2)} (3) – were synthesized. The results of an extended screening involving a set of organic cations resulting in the formation/non-formation of Bi(iii) polybromides ...

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Bromine adatom promoted C–H bond activation in terminal alkynes at room temperature on Ag(111)

24-May-2018 | Jing Liu; Qiwei Chen; Qilin He; Yajie Zhang; Xiangyu Fu; Yongfeng Wang; Dahui Zhao; Wei Chen; Guo Qin Xu; Kai Wu, Physical Chemistry Chemical Physics, 2018

The activation of C–H bonds in terminal alkynyl groups at room temperature was achieved in the reaction of 2,5-diethynyl-1,4-bis(4-bromophenylethynyl)benzene on Ag(111). Scanning tunneling microscopy studies showed the formation of organometallic species, whose stabilization was confirmed by ...

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Oxidation of p-toluic acid to terephthalic acid via a bromine-free process using nano manganese and manganese–copper mixed oxides

23-May-2018 | Mohamed A. Betiha; Nadia G. Kandile; Abdelfattah M. Badawi; Sanaa M. Solyman; Ahmed S. Afify, New Journal of Chemistry, 2018

The industrial process of terephthalic acid (TPA) production suffers from many environmental and economical drawbacks. Liquid-phase catalytic oxidation of alkylbenzene by oxygen is usually initiated by bromine in a corrosive acetic acid solvent. A recent catalytic system used environmentally ...

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