From small {Mo2O4}2+ aggregates to infinite solids
From small {Mo2O4}2+ aggregates to infinite solids
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DOI：
10.1023/a:1020590630189
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发表时间：
2002-09-01
影响因子：
2.8
通讯作者：
Brencic, JV
中科院分区：
文献类型：
--
作者：
Modec, B;Brencic, JV
通过一系列取代和二聚反应，单核氧代卤钼酸盐（V）很容易在醇和吡啶的混合物中生成，仍然具有活性的双核{Mo2O4}（2+）碎片，它们组装在一起形成更大的簇物种。总之，具有通过单个金属-金属键连接的两个钼原子的{Mo2O4}(2+)单元表现为重复的结构基序，既可以作为双核化合物中的单个{Mo2O4}(2+)单元，也可以分别作为四核、六核、八核和十二核化合物中通过桥接氧供体配体的两个、三个、四个或六个单元的组装体。吡啶、卤化物、醇盐和醇配体占据氧化钼核的外围位置。它们的结构将根据基本双核构件之间的不同排列和连接性来呈现。通过使用合适的连接体，采用双齿结合模式的草酸盐达到了目的，{Mo2O4}(2+)单元连接成无限链。
Mononuclear oxohalomolybdates(V) readily generate in the mixtures of alcohols and pyridines through a series of substitution and dimerization reactions, still reactive dinuclear {Mo2O4}(2+) fragments which assemble together into larger cluster species. In all, the {Mo2O4}(2+) unit with the two molybdenum atoms connected by a single metal-metal bond, appears as a recurrent structural motif, either as a single {Mo2O4}(2+) unit in dinuclear compounds or as assemblies of two, three, four or six units through bridging oxygen donor ligands in tetranuclear, hexanuclear, octanuclear and dodecanuclear compounds, respectively. Pyridine, halide, alkoxide and alcohol ligands occupy the peripheral positions of the molybdenum oxide cores. Their structures will be presented in terms of different arrangements and connectivities among the basic dinuclear building blocks. By using a suitable linker, an oxalate adopting a bisbidentate binding mode was shown to serve the purpose, the {Mo2O4}(2+) units were connected into infinite chains.