Synthese amino- und silylsubstituierter Triphosphane – Struktur des 1.1.3.3-Tetrakis(di-iso-propylamino)-2-trimethylsilyl- und des 1.1.3.3-Tetraphenyl-2-tri-iso-propylsilyl-triphosphans / Synthesis of Amino- and Silyl-Substituted Triphosphines – Structure of 1,1,3,3-Tetrakis(di-iso-propylamino)-2-trimethylsilyl- and 1,1,3,3-Tetraphenyl-2-tri-iso-propylsilyl-triphosphine

A variety of triphosphines [(Et2N)2P]2PR 4a–h, [(iPr2N)2P]2PR 5a–e and [Ph2P]2PR 9e–g [R = Cy (a), tBu (b), Mes (c), Me3Si (d), tBuMe2Si (e), ThexMe2Si (f), iPr3Si (g), Ad (h), H (i)] has been obtained by the reaction of the dilithiated primary phosphines RPH2 la–h with 2 equiv. of the chlorophosphines (Et2N)2PCl 2, (iPr2N)2PCl 3 or Ph2PCl 8. Methanolysis of the trimethylsilyl substituted derivative [(iPr2N)2P]2P(SiMe3) 5d yields the hydrogen substituted triphosphine [(iPr2N)2P]2PH 5i. The lithiated diphosphine (iPr2N)2P–P(SiMe3)Li 6 reacts with the chlorophosphine 2 to give the unsymmetrically substituted triphosphine (iPr2N)2P–P(SiMe3)–P(NEt2)2 7d. The compounds have been chracterized by their NMR and mass spectra. The structures of 4d and 9g have been determined by X-ray diffraction, representing the first structures of uncomplexed triphosphines.