Kristallstruktur von Pyrrolidinium-bis(diisopropylphosphinoyl)phosphid, einem System mit zweifach koordiniertem Phosphor /Crystal Structure of Pyrrolidinium-bis(diisopropylphosphinoyl)phosphide, a System with Bicoordinated Phosphorus

Abstract

Pyrrolidinium-bis(diisopropylphosphinoyl)phosphide crystallizes triclinically in the space group P1̄ with a = 1019.6(8), b = 1271.5(4), c = 999.5(7) pm, a = 100.90(5)°, β = 91.24(5)°, γ = 99.10(5)° and Z = 2 formula units. The mean P-P bond length is 212.2 pm and hence shorter than in derivates in which the electron pairs of the bicoordinated phosphorus atom are bonded to one or two M(CO)_5-groups. Additional p_π-d_π bonding explains the shortening of the P-P bond.