Preparation and structure of [Sn_8W_(18)O_(66)]~(8-) -a 26-nuclear stannotungstate with a hexagonal belt of six Sn(II) ions with outward-looking lone pairs

摘要

Sn(II) acts as template in reaction with WO_4~(2-) in formate buffer,oinducing the formation of decanuclear [SnW_9O_(33)]~(10-) and further linking them by six Sn(II) centers to give orange 26-nuclear linking them by six Sn(II)centers to give orange 26-nuclear stannotungstate [Sn_8W_(18)O_(66)]~(8-).Crystalline [Na_(12)(OH)_4(H_2O)_(28)][Sn_8W_(18)O_(66)]·18H_2O(1) was isolated and structurally characterized.