S. P. Petrosyants

Second coordination sphere of aluminium and gallium hexacoordination complexes

It is shown by means of 19F NMR that the hexacoordinated solvates of aluminium and gallium in solutions of methyl, ethyl and n-propyl alcohols form outer-sphere complexes with the halide ions, F−, Cl− and Br−, in which the acidoligands are situated in the second coordination sphere. The outer-sphere complexes are formed on the basis of purely alcoholic solvates, M(ROH)63+, as well as the complexes containing the mixed coordination sphere, M(ROH)6−n(H2O)n3+, and Al(CH3OH)6−n(C2H5OH)n2+.

Spin Coupling Constants 27A1-14N and 71Ga-14N

Chemical shifts of 27A1, 69,71Ga NMR signals and spin coupling constants Al-N, Ga-N for complexes [MX4−n(NCS)n]− and [MX4−n(NCO)n]−(M=A1, Ga; X=C1, Br, I; n=0−3) are reported. The resonance multiplicity is unambiguous proof of the coordination of NCS− and NCO− ions through the nitrogen atom.