79,81Br NQR Spectra of Alkyl(4-Bromophenyl)Sulphides

Abstract

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.