PUB - Publikationen an der Universität Bielefeld

The thermolysis of 1,2,3-tris(pentamethylcyclopentadienyl) cyclotriphosphane [(Cp*P)3, 1] or 2,3,4,6-Tetrakis(pentamethylcyclopentadienyl) bicyclo[3.1.0]hexaphosphane [Cp4*P6, 2] leads in addition to the known 3,4-bis(pentamethylcyclopentadienyl) tricyclo[3.1.0.0(2,6)]hexaphosphane [Cp2*P6, 3] to the pentacyclic carbaphosphanes 3,4,5,6,11-pentamethyl-endo-9-pentamethylcyclopentadienyl-3, 4,5,6,11-pentacarba-pentacyclo [6.1.1(1,8).1(3,6).0(2,7)0(10,11)]-4-en-undecaphosphane and 3,4,5,6, 11-pentamethyl-exo-9-pentamethylcyclopentadienyl-3,4,5,6,11-pentacarba-p entacyclo [6.1.1(1,80.1(3.6).0(2,7)0(10,11)]-4-en-undecaphosphane [Cp*Me5P6C5, 4a, 4b]. Furthermore, other polyphosphanes are formed, like 1,2,3,4-tetrakis(pentamethylcyclopentadienyl) cyclotetraphosphane [(Cp*P)4, 5] and 2,4-bis(pentamethylcyclopentadienyl)-tetraphosphabicyclo [1.1.0]butane [(Cp*P)2P2, 6]. The structure of 4a and 4b is determined by NMR-spectroscopy. The molecule contains a P5C3-cunean-unit, to which a C2Me2-brigde and a PCp*-brigde is bonded.