摘要 : Two novel trinuclear tin oxo clusters [(C_2S_3N_2)R_6Sn_3O-(OH)Y] centre dot L [R=CH_3,Y=OH,L=1 centre dot 5H_2O (1);R=PhCH_2,Y=OEt,L=0 (2)],a pentanuclear tin macrocycle [(CH_3)_2Sn (C_2N_2S_3)]_5 centre dot CH_2C1_2 centre dot 3... 展开 Two novel trinuclear tin oxo clusters [(C_2S_3N_2)R_6Sn_3O-(OH)Y] centre dot L [R=CH_3,Y=OH,L=1 centre dot 5H_2O (1);R=PhCH_2,Y=OEt,L=0 (2)],a pentanuclear tin macrocycle [(CH_3)_2Sn (C_2N_2S_3)]_5 centre dot CH_2C1_2 centre dot 3H_2O (3) and [(PhCH_2)_4Cl_2Sn(C_2S_3N_2)] (4) have been synthesized by the reaction of 2,5-dimercapto-1,3,4-thiadiazole with dialkyltin dichloride in ethanol (95%) or dichloromethane.Complexes 1-4 have been characterized by elemental analysis and IR,~1H,~(13)C and ~(119)Sn NMR spec-troscopy.The structures of 1-3 have been determined by X-ray crystallography.Complexes 1 and 2 display a unique tricyclic structure consisting of fused five-membered Sn_2ON_2 and four-membered Sn_2O_2 rings that form a planar N_2Sn_3O_2 skeleton,with a distorted trigonal bipyramidal coordination at tin.Complex 3 is a pentanuclear 35-membered tin macro-cycle containing the crown thioether-type ligand in which all five tin atoms bond to the sulfur and nitrogen atoms with distorted octahedral geometries.The structures of complexes 1 and 3 are stabilized by hydrogen bonds or intermolecular non-bonding S-S interactions. 收起