Synthesis and supramolecular architectures of tetrakis (triorgano-stannyltetrazoles), including the crystal structrue of hydrated 1, 2, 4, 5-tetrakis (triethylstannyltetrazolyl) benzene

摘要

Six tetrakis (triorganostannyltetrazolyl)-alkanes and -benzenes have been prepared by a cycloaddition reaction between SnR_3N_3 and either 1, 2, 4, 5-(NC)_4C_6H_2, 1, 1, 3, 3-(NC)_4C_3H_4 or 1, 3, 3, 5-(NC)_4C_5H_8. All compounds contain tin in a trans-XYSnR_3 environment; in anhydrous compounds the axial co-ordination about tin is exclusively from the tetrazoles (X, Y = N), while hydrated materials may also contain less symmetrical arrangements (X = N; Y = O). The structure of 1, 2, 4, 5-tetrakis (triethylstannyltetrazolyl) benzene dihydrate has been determined and displays a complex three-dimensional network in which each tetrazole acts as at least a bidentate unit. One molecule of water co-ordinates one of the metal centres while the other is embedded in the lattice as a guest.