Does a Sterically Bulky Group Occupy the Equatorial Site in Trigonal Bipyramidal Phosphorus?
作者:Praveen Kommana、N. Satish Kumar、Jagadese J. Vittal、E. G. Jayasree、E. D. Jemmis、K. C. Kumara Swamy
DOI:10.1021/ol035990i
日期:2004.1.1
[structure: see text] The sterically bulky tert-butyl group occupies an apical position in trigonal bipyramidal phosphorus in the compound [CH2(6-t-Bu-4-Me-C6H2O)2]P(t-Bu)(1,2-O2C6Cl4) in contrast to the occupation of an equatorial position by the small methyl group in [CH2(6-t-Bu-4-Me-C6H2O)2]P(Me)(1,2-O2C6Cl4); this observation contradicts the familiar "apicophilicity rules" for trigonal bipyramidal
[结构:见正文]在化合物[CH2(6-t-Bu-4-Me-C6H2O)2] P(t-Bu)(1, (O2-C6Cl4)与[CH2(6-t-Bu-4-Me-C6H2O)2] P(Me)(1,2-O2C6Cl4)中的小甲基占据赤道位置相反;这一发现与三角双锥体磷的熟悉的“亲嗜性规则”相矛盾。[CH2(6-t-Bu-4-Me-C6H2O)2] P(R)(1,2-O2C6Cl4)(R = Me,Et和n-Bu)的低温溶液31P NMR光谱显示存在两种以上的异构体。