82240-49-1Relevant academic research and scientific papers
Contributions to the Chemistry of Phosphorus, 110. 1,2-Di-tert-butyldiphosphane and tert-Butyldiphosphane
Baudler, Marianne,Gruner, Christian,Tschaebunin, Helmut,Hahn, Josef
, p. 1739 - 1745 (2007/10/02)
The hydrolysis of 1,2-dipotassium 1,2-di-tert-butyldiphosphide, K2(tBuP)2, as well as the methanolysis of 1,2-di-tert-butyl-1,2-bis(trimethylsilyl)diphosphane lead in a good yield to the hitherto unknown 1,2-di-tert-butyldiphosphane (2), which is remarkably stable against disproportionation reactions.In solution at 0 deg C 2 exists in a mixture of the d,l and meso form (7:3).The assignment of the diastereomers to the NMR spectroscopically abserved spin systems results from the different 1J(PP) and 2J(HPP) coupling constants of the isomers.The preferred trans arrangement of the tert-butyl substituents leads to a gauche-conformation of the lone electron pairs in the d,l- and to a predominant trans-conformation in the meso-configuration. 2 is metallized stepwise by n-butyllithium; it reacts with diphsophane forming tert-butyldiphosphane (3), which exists only in the equilibrium with its starting compounds.
