“TRIPLE-DECKER SANDWICH” WITH A PLANAR AS5 RING. SYNTHESIS AND CRYSTAL STRUCTURE OF CPMO(μ-(η4-AS5))MOCP
“TRIPLE-DECKER SANDWICH” WITH A PLANAR AS5 RING. SYNTHESIS AND CRYSTAL STRUCTURE OF CPMO(μ-(η4-AS5))MOCP
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DOI：
10.1002/chin.198247306
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发表时间：
1982-11
期刊：
影响因子：
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通讯作者：
A. Rheingold;M. Foley;P. Sullivan
中科院分区：
文献类型：
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作者：
A. Rheingold;M. Foley;P. Sullivan
同原子主族链状化合物的不寻常构型可以通过与过渡金属中心的配位来稳定。含有arsenicatom链的新型结构的产生特别富有成效，这是由于键能之间的方便平衡，键能足够低以允许容易的转化，而键能足够高以赋予足够的稳定性以分离中间体和最终产物。West对含有有机取代的连接的胂基片段的结构进行了综述。1我们现在报道了第一个过渡金属配合物CpMo [^-（7？4-As5）] MoCp（1）。配合物1是环-（AsCH_3）_5与[CpMo（CO）_3]_2反应得到的一系列簇合物中的一员。[CpMo得到[（CO）2] 2（AsCH 3）5（2
Unusual configurations of homoatomic main-group catenates can be stabilized by coordination to transition-metal centers. The generation of novel structures containing arsenicatom catenates has been particularly fruitful due to a convenient balance between bond energies low enough to allow facile transformations and high enough to confer sufficient stability for isolation of both inter-mediates and final products. Structures containing organically substituted linked arsinidene fragments, RAs, havebeen reviewed by West. 1 We now report the preparation and crystallographic characterization of the first transition-metalcomplex containing a ring of five unsubstituted arsenic atoms in a triple-decker sandwich structure, CpMo [^-(7? 4-As5)] MoCp (1). Complex 1 is one member of a series of cluster products ob-tained from reactions of cyclo-(AsCH3) 5 and [CpMo (CO) 3] 2, as shown in Scheme I.[CpMo (CO) 2] 2 (AsCH3) 5 (2) is obtained