【摘要】 ［ＶＭｏ３Ｏ４（Ｏ２ＣＥｔ）８］２Ｎａ２（１），三斜晶系，Ｐ１空间群，ａ＝１２．９７７（７），ｂ＝１４．０７０（６），ｃ＝１２．３３８（８），α＝１０９．８１（４），β＝１１７．２０（４），γ＝９０．５１（５）°，Ｖ＝１８４８．８３，Ｍｒ＝２０２０．６，Ｄｃ＝１．８１ｇ／ｃｍ３，Ｚ＝１，Ｆ（０００），μ＝１２．９ｃｍ１（ＭｏＫα）对３７４２个可观测反射点（Ｉ＞３σ（Ｉ））最终一致性因子为Ｒ＝０．０１８，Ｒω＝０．０５４。单晶结构分析表明，簇阴离子中两个［Ｍｏ３Ｏ４］４＋单元通过两个＂桥＂金属Ｖ原子连接成一个奇特的环状结构，Ｍｏ－Ｍｏ平均键长为２．５１９（１），Ｍｏ…Ｖ间平均距离为３．６５４。簇阴离子通过Ｎａ＋连成一个一维长链，Ｎａ原子与氧原子形成一个少见的五配位三角双锥结构，Ｎａ－Ｏ距离仅为２．３１２，Ｎａ－Ｏ间较强的相互作用以及无限长链的晶体结构很好地解释了簇合物（１）的稳定性和不溶性。更多还原

【Abstract】 VMo3O4(O2CEt)8]2Na2(1),triclinic,space group P1,a=12.977(7),b=14.070(6),c=12.338(8).α=109.81(4),β=117.20(4),γ=90.51(5),V=1848.8,Mr=2020.6,D=1.81g/cm3,Z=1,F(000)=1008,μ=12.9 cm-1(MoKα).final R=0.048.Rω=0.054 for 3742 observed reflections(I>3σ(I)).The result of X-ray structure determination shows that there is an interesting centrosymmetric anion,in which two[Mo3O4]4+ units are connected by two V atoms to form a novel ring structure.The average Mo-Mo bond length is 2.519(1) and the average distance between V and Mo atoms is 3.654 A.The anions are connected by Na+to form a one-dimensional infinite chain structure.Each Na atom is coordinated to five oxygen atoms with average Na-O distance of 2.312 A.The short Na-O distance and chain structure are responsible for the stabling and insolubility of the cluster(1).更多还原