SILICIUMVERBINDUNGEN MIT STARKEN INTRAMOLEKULAREN STERISCHEN WECHSELWIRKUNGEN XII. SYNTHESE UND MOLEKUELSTRUKTUR DES 1,2-BIS(2,4,6-TRI-t-BUTLYPHENYL)-3,3-DI-t-BUTYL-1,2,3-DIPHOSPHASILIRANS

Article abstract of DOI:10.1016/0022-328X(85)88066-9

The reaction of di-t-butyldiiodosilane with excess lithium naphthalenide followed by treatment with dichloro(2,4,6-tri-t-butylphenyl)phosphane (ArPCl2) leads to the diphosphene ArP=Ar, the air-stable compound 1,2-bis(2,4,6-tri-t-butylphenyl)-3,3-di-t-butyl-1,2,3-diphosphasilirane (3), and other products.The X-ray structure analysis reveals slightly elongated Si-P and P-P bond lengths of about 224.3 and 223.4 pm, respectively.The steric crowding of the three-membered heterocycle causes a puckering of the phenyl rings and a bending of the ortho-t-butyl groups out of the ring planes.