Six novel halogen-bonded cocrystals of 1,3,5-triiodo-2,4,6-trifluorobenzene with three structural isomers benzoylpyridine have been synthesized mechanochemically and by crystallization from solution, five which were structurally characterized. In four cocrystals, is a ditopic halogen-bond acceptor participating in halogen bonding both pyridine nitrogen carbonyl oxygen atoms, while one cocrystal...

Halogen bond donors had an increasing impact on catalysis in recent years, and their development is highly active. In particular, numerous iodine-based halogen have been developed used to promote various reactions through coordinating carbonyl groups, a ubiquitous mode of activation catalysis. We now report computational data which strongly suggests that alternative mode, direct π-complexation,...

BACKGROUND Standard examination of contrast sensitivity under conditions of glare disability is performed with incandescent light. A new halogen glare test that simulates glare as seen with oncoming vehicle headlights was used to measure glare disability in patients implanted with multifocal and monofocal intraocular lenses (IOLs). METHODS 28 patients with an average age of 69 years (SD 12 ye...

Isolation of pre-reactive complexes and analysis of kinetics of redox reactions of tetrabromomethane and tribromonitromethane demonstrated that halogen bonding results in significant lowering of the activation barriers for electron transfer, and that the rate constants of such (inner-sphere) processes can be evaluated from spectral, structural, and thermodynamic characteristics of the halogen-b...

Three hybrid compounds have been synthesized through hydrothermal reactions of UO(2)(NO(3))(2)·6H(2)O with 4-halobenzoic acid (X = Cl, Br, I). The formation of these compounds utilizes a composite synthesis methodology that explicitly employs aspects of both coordination chemistry and supramolecular chemistry (namely halogen···halogen interactions).

A Mukaiyama aldol reaction can be catalyzed by bidentate halogen bond donors with very high efficiency. The halogenated catalysts were stable over multiple consecutive runs, which supports the halogen-bond-based mode of catalysis.

A new chemical scheme is developed for the multiphase photochemical box model SEAMAC (sizeSEgregated Aerosol model for Marine Air Chemistry) to investigate photochemical interactions between volatile organic compounds (VOCs) and reactive halogen species in the marine boundary layer (MBL). Based primarily on critically evaluated kinetic and photochemical rate parameters as well as a protocol for...

A quantum chemical investigation was carried out to study the properties of intermolecular F•••F, Br•••Br and Br•••O interactions in crystalline 1-bromo-2,3,5,6-tetrafluoro-nitrobenzene (BFNB). This system was selected to mimic the halogen-halogen as well as halogen bonding interactions found within crystal structures as well as within biological systems. We found that fluorine atoms have weak ...

a quantum chemical investigation was carried out to study the properties of intermolecular f•••f, br•••br and br•••o interactions in crystalline 1-bromo-2,3,5,6-tetrafluoro-nitrobenzene (bfnb). this system was selected to mimic the halogen-halogen as well as halogen bonding interactions found within crystal structures as well as within biological systems. we found that fluorine atoms have weak ...