Abstract
Abstract Spin-spin and spin-lattice relaxation times of nuclei 69,71Ga, 27Al, 14N in anions [MClnBr4-n]-and the solvate complexes [M(CH3CN)6]3+, produced from dissolution of MCl3 and MBr3 in the mixture CH3CN + CH3NO2 (M = Ga, Al), are measured in the temperature range from -40 up to + 70 °C. It is shown that nuclear spins of 69,71Ga, 27Al relax in the anionic and cationic complexes by means of the second-kind scalar and quadrupole relaxation mechanisms (due to the relaxation of the nuclei 35,37Cl, 79,81Br, 14N). The complexes [MClnBr4-n]-and [M(CH3CN)6]3+ in the investigated solutions are inert and do not undergo exchange processes in the NMR time scale. The scalar spin coupling constants in [M(CH3CN)6]3+ are determined from the scalar contribution to the relaxation rate of 69,71Ga, 27Al, and the measured relaxation time of 14N in the solvate complex; the results are J(69Ga-14N) = 59 ± 5 Hz, J(71Ga-14N) = 74 ± 6Hz, J(27Al-14N) = 22 ± 2Hz.
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