[S-2], [S-3], and [N-3] coordination modes of hydrotris(thioxotriazolyl)borato. Zinc, nickel, cobalt, and bismuth complexes

摘要

The ligand hydrotris (1,4-dihydro-3-methyl-4-phenyl-5-thioxo-1,2,4-triazolyl)borato (Tr-Ph,Tr- Me) was synthetized as natrium salt and the complexes [Zn(Tr-Ph,Tr-Me)(2)] (.) 7.5H(2)O (.) 1.5CH(3)CN (2a), [Zn(Tr-Ph,Tr-Me)(2)]. 8DMF (2b), [Co(Tr-Ph,Tr-Me)(2)] (.) 8DMF (3a), [Ni(Tr-Ph, (Me))(2)] (.) H2O (.) 6DMSO (4a), [Bi(Tr-Ph,Tr-Me)(2)]NO3 (5), have been isolated and structurally characterized by X-ray diffraction. In the zinc derivatives the ligand adopts different denticity and coordination modes, eta(2) and [S-2] for 2a and eta(3) and [N-3] for 2b, depending on the crystallization solvent, giving rise to tetrahedral and octahedral geometry, respectively. In the octahedral cobalt and nickel complexes the ligand is eta(3) and [N-3] coordinated whereas in the bismuth complex the eta(3) and [S-3] coordination is exhibited. [References: 60]