A high resolution powder X-ray diffraction study of the products of reaction of dimethyl sulfide with bromine; crystal and molecular structures of (CH_3)_2SBr_n (n=2, 2.5 or 4)

摘要

The crystal and molecular structures of three reaction products formed between dimethyl sulfide and bromine have been characterised by high resolution powder synchrotron X-ray diffraction. Depending on the method of preparation, three compounds have been identified as (CH_3)_2SBr_2 (CH_3)_2SBr_(2.5) and (CH_3)_2SBr_4. The first, synthesised by the addition of bromine to dimethyl sulfide, was isolated as a single phase and is a charge-transfer adduct. The other two, both containing (CH_3)_2SBr~+-like species, were found copreciptitated when dimethyl sulfide was added to bromine at -30 deg C.