Multinuclear magnetic resonance studies. Part 2. Diphosphanes and dithioxodi-λ5-phosphanes
Multinuclear magnetic resonance studies. Part 2. Diphosphanes and dithioxodi-λ5-phosphanes
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多核磁共振研究第 2 部分：二膦和二硫代二-λ5-膦。
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
M. Fild
中科院分区：
文献类型：
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作者：
S. Aime;R. Harris;E. .. Mcvicker;M. Fild
Carton-13和P-31 n.rn.r.对通式(R1R2P)2和[R1R2(S)]2的一些四烷基二膦和四烷基二硫氧基-λ5-膦分别进行了光谱测定。还研究了一些苯基取代的类似化合物。研究了含钨同分异构体在~(31)P共振中的卫星共振。将数据与1H n.m.r一起处理。在适当的情况下，研究(P，P)和(P，C)偶合常数，以及13C和31P的化学位移。这些n.m.r。从空间相互作用和立体异构体的角度讨论了参数。两个系列化合物的|1Jpp|值都随着取代基尺寸的增大而显著增大。这一效应与δp的增加有关。
Carton-13 and phosphorus-31 n.rn.r. spectra have been obtained for a number of tetra-alkyldiphosphanes and tetra-alkyldithioxodi-λ5-phosphanes of general formulae (R1R2P)2 and [R1R2(S)]2 respectively. Some analogous compounds with phenyl substituents have also been studied. Satellite resonances in 31P resonance due to W.-containing isotopomers have been examined. The data are treated, together with 1H n.m.r. studies where appropriate, to obtain (P,P) and (P,C) coupling constants, as well as 13C and 31P chemical shifts. These n.m.r. parameters are discussed in terms of steric interactions and stereoisomerism. The values of |1Jpp| for both series of compounds increase markedly as the size of the substituents increases. and this effect correlates with an increase in δp.