Phosphine complexes of tungsten(0) poly(alkyne); crystal structures of W(PhCCPh) 3(PMe 3) and W(TolCCTol) 2( η4-C 4Tol 4)(PMe 3)

Abstract

Reactions of W(PhCCPh) 3L (LCO or NCMe) with PMe 3, PPh 2Me and PPh 3 produce W(PhCCPh) 3(PMe 3). W(PhCCPh) 3−(PPh 2Me) and W(PhCCPh) 3(PPh 3), respectively. Reaction of W(PhCCPh) 3(NCMe) with 1,1′-bis(diphenylphosphino)ferrocene (dppf) forms W(PhCCPh) 3( η 1dppf) and [W(PhCCPh) 3] 2( η 1, η 1-dppf). Treating W(RCCR) 2( η 4-C 4R 4)(NCMe) (RPh and Tol) with PMe 3 affords W(RCCR) 2(η 4-C 4R 4)(PMe 3) crystallizes in the space group P 3 with a = 14.000(4). c = 11.183(3) A ̊ , V = 1898.3(7) A ̊ 3, Z = 2 and R F = 0.032. W(TolCCTol) 2(η 4- C 4Tol 4) ( PMe 3) crystallizes in the space group P2 1/ c with a = 13.588(2), b = 19.289(5), c = 22.150(5) A ̊ , β = 90.57(2)°, V = 5805.(2) A ̊ 3, Z = 4 and R F = 0.055 .