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

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 pπ-dπ bonding explains the shortening of the P-P bond.

Notizen: Kristallstruktur einer Phosphor-Stickstoff-Verbindung mit zweifach koordiniertem, kationisch stabilisierten Phosphor / Crystal Structure of a Phosphorus-Nitrogen Compound with Two-Coordinate Cationic Phosphorus

The crystal structure of a phosphorusnitrogen compound with two-coordinate cationic phosphorus was determined from single crystal X-ray data. The structure of the molecule shows two very short P–N distances (161.4 pm) indicating 3pπ(P)— 2pπ(N) interaction between the phosphorus and the lone pairs of the nitrogen atoms. The N–P–N angle was found to be 97.4°.