Liang-Fu Tang, Zhi-Hong Wang, J. Chai
Sep 15, 2000
Citations
0
Influential Citations
39
Citations
Journal
Polyhedron
Abstract
Abstract A novel poly(triazol-1-yl)alkane ligand, bis(3,5-dimethyl-1,2,4-triazol-1-yl)methane CH2(3,5-Me2Tz)2, has been synthesized under phase transfer catalytic conditions. This ligand as well as bis(1,2,4-triazol-1-yl)methane CH2Tz2 and 1,2-bis(1,2,4-triazol-1-yl)ethane (CH2)2Tz2 reacts with diphenyltin(IV) halides to yield novel five- and six-coordinate diorganotin complexes. The crystal structure of (CH2Tz2)SnPh2Br2 determined by X-ray analysis shows that bis(triazol-1-yl)methane coordinates to the tin atom through exodentate nitrogen atoms on the 4-position of triazole rings to form linkage coordination polymers, which leads to a bridging instead of a general chelating metal coordination. Possibly owing to the hindrance of methyl groups in the triazole ring of CH2(3,5-Me2Tz)2, this ligand is a weaker donor to an organotin acceptor than CH2Tz2. In the hydrolysis product [SnPh2Br2(H2O)]·(CH2(3,5-Me2Tz)2), the tin atom is five-coordinate with a trigonal bipyramid geometry, and the aqua ligand is simultaneously connected to the exonitrogen atoms of two adjacent CH2(3,5-Me2Tz) molecules through hydrogen bonding.