Molecular structure of the electron donor–acceptor complex of trimethylamine–dibromine in the gas phase as determined by electron diffraction

Abstract

A gas-phase electron diffraction study of trimethylamine–bromine complex indicates that principal bond lengths (r_a) are N–Br 1.98(3), Br–Br 2.29(1), C–N 1.67(2)Å, and the Br–Br bond is out of the C_3v axis of trimethylamine with the NBrBr angle 112(3)°. Thus the structure of gaseous (CH₃)₃N–Br₂ is considerably different from the C_2vconfiguration found for (CH₃)₃N–I₂ in the solid phase.