PHOSPHA-GUANIDINE. I. EINE NEUE VERBINDUNGSKLASSE MIT ZWEIFACH-KOORDINIERTEM DREIBINDIGEM PHOSPHOR

Article abstract of DOI:10.1016/S0022-328X(00)93328-X

Bis-silylated phosphines react with carbodiimides giving phosphaguanidines through insertion into the P-Si-bond.Depending on the substituents R' and R" the N,P-bis-silylated derivatives (I) or the N,N'-bis-silylated isomers (II) are formed, the latter results from P,N-silyl migration and formation of a P=C double bond. (R = Me, Cy, t-Bu, Ph, p-Me2NC6H4; R' = Alkyl, R" = Aryl e.g.Cy, Ph, p-ClC6H4).The structures of compounds I and II are discussed on the basis of their NMR spectra and the reaction with methanol leads to P-H-functional derivatives .Treatment of RP(SiMe3)2 with PhN=C=O is also discussed.