Abstract
Abstract An overview is given on synthesis and structures of new bidentate phosphaalkene ligands [(RMe2Si)2C P]2E (E = O, NR, N−) and (RMe2Si)2C P N(R′) PR′′2. Exceptional properties of these ligands, extending beyond predictable properties of phosphaalkenes are: (i) the N Si bond cleavage of [(iPrMe2Si)2C P]2NSiMe3 with AuI and RhI chloro complexes under mild conditions leading to binuclear complexes of the 6π-delocalised imidobisphosphaalkene anion [(iPrMe2Si)2C P]2N−, and (ii) the chlorotropic formation of molecular 1:2 PdII and PtII metallochloroylid complexes with novel ylid-type ligands [(RMe2Si)2C P(Cl) N(R) PR2]−, and the transformation of a P-platina-P-chloroylid complex into a C-platina phosphaalkene by intramolecular chlorosilane elimination. Properties of the heavier congeners [(RMe2Si)2C P]2E (E = S, Se, Te, PR, P−, As−) and (RMe2Si)2C P E PR′′2 (E = S, Se, Te) are also described.
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