Phosphane‐Borane Chemistry. – Borane Adducts of Two Polyfunctional Phosphanes
Phosphane‐Borane Chemistry. – Borane Adducts of Two Polyfunctional Phosphanes
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膦-硼烷化学 - 两种多官能膦的硼烷加合物。
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
G. Müller
中科院分区：
文献类型：
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作者：
H. Schmidbaur;T. Wimmer;J. Lachmann;G. Müller
以三脚架膦为原料，以Me2S-BH3为硼源，合成了1，1，1-三[(二甲基膦)甲基]乙烷的三(硼烷)加合物MEC(CH2PMe2BH3)3(2)。用单晶X射线衍射法测定了2·1/2甲苯的晶体结构。分子表现出结晶学上的C3对称性和整体交错构象。用类似的方法合成了1，3-二磷杂环己烷的双(硼烷)加合物CH2(PH2BH3)2(3)，该加合物在50℃以上分解为不溶产物，其元素分析表明P-C键断裂比P-B键断裂更频繁。
The tris(borane) adduct MeC(CH2PMe2BH3)3 (2) of 1,1,1-tris-[(dimethylphosphino)methyl]ethane has been prepared from the tripodal phosphane and Me2S–BH3 as the borane source. The crystal structure of 2·1/2 toluene has been determined by single-crystal X-ray diffraction methods. The molecules display crystallographic C3 symmetry and an overall staggered conformation. In an analogous way the bis(borane) adduct CH2(PH2BH3)2 (3) of 1,3-diphosphapropane has been synthesized, which decomposes above 50°C to give insoluble products, whose elemental analysis indicated that termal P–C bond cleavage is more frequent than P–B bond cleavage.