四核钼簇合物的配体取代反应及产物Mo_4S_4(μ-OAc)_2(dtp)_4的晶体结构

SYNTHESIS AND CRYSTAL STRUCTURE OF Mo_4S_4(u-OAc)_2(dtp)_4

标题化合物(Ⅰ)经由Mo_4S_4(μ-dtp)_4(Ⅱ)[dtp=S_2P(OEt)_2]和Ni(OAc)_2反应而得。(Ⅰ)晶体属单斜晶系,空间群P2/c,a=13.176(4),b=11.699(3),c=18.526(4)(?),β=116.11(3)°,V=2564(3)(?)~3,Z=2,D_c=1.776g·cm^(-3)。晶体结构由直接法解出,最终偏离因子R=0.085。本文结果表明,可由已知的四核钼簇合物经过配体置换反应,合成得到其簇骼中心[Mo_4S_4]保持不变并具有-OAc作为桥式配体和-dtp作为端基配体的混合配体类立方烷[Mo_4S_4]簇合物。

The title cluster compound (1) was obtained by the reaction of the cluster compound Mo4S4(u-dtp)2 (dtp)4 (2) with Ni(OAc)2. The crystal belongs to monoclinic with space group P2/c, a = 13.176(4),b =11.699(3), c= 18.526(4)A; 0= 116.11(3) ,F=2564(3) 3, Z = 2, Dc= 1.776g ?cm-3. The structure analysis indicates that (O2CCH3)- ligands selectively substitute the bridging (dtp)- ligands. Meanwhile the terminal (dtp)- ligands arc not substituted. In the results, the new type of Mo4 cluster molecule where the structure contains two species of bidentate ligand is prepared.