title: Synthesis and P-P cleavage reactions of [P(X)X']2; X-ray structures of [Co[P(X)X'](CO)3] and P4[P(X)X']2[X = N(SiMe3)2, X'= NPri2].
abstract: Treatment of P(X)(X')Cl with KC8 gave the crystalline diphosphine [P(X)X']2 (1) which dissociated reversibly into the phosphinyl radical *P(X)X' (2), a plausible intermediate in the reaction of with [Cr(CO)6], [Co(NO)(CO)3] or P4, yielding [Cr[P(X)X']2(CO)3] (3), [Co[P(X)X'](CO)3] (4), or 1,4-P4[P(X)X']2 (5); the P(X)X' substituent is pyramidal at P in but planar in [X = N(SiMe3)2, X'= NPri2].
authors.affiliation: The Chemistry Laboratory, University of Sussex, Brighton, UKBN1 9QJ. m.f.lappert@sussex.ac.uk
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Bezombes
authors.forename: Peter B
authors.initials: PB
authors.lastname: Hitchcock
authors.forename: Michael F
authors.initials: MF
authors.lastname: Lappert
authors.forename: Jacek E
authors.initials: JE
authors.lastname: Nycz
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D010720:Phosphines / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D010720:Phosphines; D003035:Cobalt; D012825:Silicon