合成并测定了标题化合物的分子结构,Ca空间群,a=2.1933(2)nm,b=1.2447(3)nm,c=1.5912(5)nm,β=117.02(2)°,I＇=3.8679 nm~3,Z=4,最后根据I>3G(I)的2849个独立衍射点的强度数据,把结构精修到R=0.036.在晶体结构测定基础上进行了EHMO计算,以研究其簇骼成键性质,结果表明,该分子虽不存在金属-金属键,但M与μ-O之间除了σ键外,还存在四中心d-ρπ键,它是该类化合物稳定的主要因素。 The molecular structure of the title compound was synthesized and determined as follows: a = 2.1933 (2) nm, b = 1.2447 (3) nm, c = 1.5912 (5) nm, β = 117.02 nm ~ 3 and Z = 4, and finally the structure was refined to R = 0.036 according to the intensity data of 2849 independent diffraction points of I> 3G (I) .The EHMO calculation was carried out on the basis of the crystal structure determination to study the cluster The results show that there is a four-center d-ρπ bond between M and μ-O except the σ bond, which is the main factor of the stability of the compounds.