| Abstract: | Contributions to the Chemistry of Phosphorus. 159. On the Reaction of the Diphosphaborirane (t-BuP)2BN(i-Pr)2 with Potassium or Potassium Naphthalenide The reaction of (t-BuP)2BN(i-Pr)2 with potassium or K-naphthalenide in tetrahydrofuran leads to K(t-Bu)P? ;BN(i-Pr)2? P(t-Bu)K ( 1 ) via P? ;P bond cleavage of the three-membered ring skeleton. Above ? 78°C 1 changes into the asymmetric compound K(t-Bu)P? ;P(t-Bu)? BHN(i-Pr)2 ( 2 ). In dimethoxyethane additionally the monometallated diphosphaborirane K(t-Bu)P2BN(i-Pr)2 ( 3 ) is formed. 1 and 3 , which could be isolated free from other phosphorus containing compounds, as well as the corresponding silylphosphanes Me3Si(t-Bu)P? ;BN(i-Pr)2? ;P(t-Bu)SiMe 3 ( 4 ) and Me3Si(t-Bu)P2BN(i-Pr)2 ( 5 ) were characterized by NMR spectroscopy. Protolysis of 3 or 5 leads to a decomposition of the three-membered ring skeleton with formation of H(t-Bu)P? ;PH2. |
