PMR Studies of the Solvation of Nickel(II) in CD3OH and CH3OD

Publisher Website
Google Scholar
Abstract
Evidence is presented that the coordination number of the nickelous ion in methanol solutions is six. The chemical-shift temperature dependence and the linewidths of the PMR absorption-mode signals of CD3OH and CH3OD coordinated to the nickelous ion were measured. The hyperfine coupling constants for the interaction between the hydroxyl proton and the unpaired electrons of the nickelous ion were found to be A / h = (6.2 ± 0.3) × 105Hz and for the interaction with the methyl protons A / h = (6.4 ± 0.2) × 105Hz. The relaxation time of the unpaired electrons of the nickelous ion was estimated to be about 2 × 10−11 sec at −49°C. The ratio of the nickelous-ion–methyl-protons distance to the nickelous-ion–hydroxyl-proton one was found to be 1.32 ± 0.03. Earlier observations, relevant to those reported here are discussed and, in some cases, reinterpreted.