Silylierungs‐ und Desilylierungs‐Experimente mit sterisch gehinderten Stannylphosphanen

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Abstract
Silylating and Desilylating Experiments with Sterically Hindered Stannyl PhosphanesMeP(SiMe3)2 reacts with tBu2Cl2 to give the four‐membered ring (tBu2SnPMe)2 (1). Mixed silyl‐stannyl‐substituted phosphanes tBu3SnP(SiMe3)2 (2) and tBu2Sn[P(SiMe3)2]2 (3) are obtained by metathesis of LiP(SiMe3)2 with tBu3SnCl and tBu2SnCl2, respectively. Methanolysis of 2 and 3 yields the corresponding PH compounds tBu3SnPH2 (4) and tBu2Sn(PH2)2 (5). On heating of 5, the four‐membered ring (tBu2SnPH)2 (6) is formed by a condensation reaction. The new compounds are characterized by NMR (1H, 31P, 119Sn) and mass spectroscopy.