189749-25-5Relevant academic research and scientific papers
Phosphine complexes of tungsten(0) poly(alkyne); crystal structures of W(PhC≡CPh)3(PMe3) and W(TolC≡CTol)2(η4-C4Tol 4)(PMe3)
Yeh, Wen-Yann,Ting, Che-Sheng,Chien, Shu-Min,Peng, Shie-Ming,Lee, Gene-Hsiang
, p. 335 - 342 (1997)
Reactions of W(PhC≡CPh)3L (L=CO or NCMe) with PMe3, PPh2Me and PPh3 produce W(PhC≡CPh)3(PMe3), W(PhC≡CPh)3-(PPh2Me) and W(PhC≡CPh)3(PPh3), respectively. Reaction of W(PhC≡CPh)3(NCMe) with 1,1′-bis(diphenylphosphino)ferrocene (dppf) forms W(PhC≡CPh )3(η1-dppf) and [W(PhC≡CPh)3J2(η1, η1-dppf). Treating W(RC≡CR)2(η4-C4R4)(NCMe) (R = Ph and Tol) with PMe3 affords W(RC≡CR)2(η4-C4R4) (PMe3). W(PhC≡CPh)3(PMe3) crystallizes in the space group P3 with a=14.000(4), c=11.183(3) A, V=1898.3(7) A3, Z=2 and RF=0.032. W(TolC≡CTol)2(η4-C4Tol 4)(PMe3) crystallizes in the space group P21/c with a=13.588(2), b=19.289(5), c=22.150(5) A, β=90.57(2)°, V=5805.(2) A3, Z=4 and RF=0.055.
Mechanistic information of substitution reaction of W(PhC≡CPh)3(CO) with trimethylphosphine
Yeh, Wenn-Yann,Chien, Shu-Min
, p. 191 - 194 (2007/10/03)
Substitution reaction of W(PhC≡CPh)3(CO) (1) with PMe3 to give W(PhC≡CPh)3(PMe3) (2) has been studied by IR and NMR spectroscopy as well as cross-over experiments. A metastable intermediate W(CO)(PhC≡CPh)2(PMe3)2 (3) is produced by adding two PMe3 moieties into 1 accompanied with loss of a PhC≡CPh ligand. Subsequent conversion from 3 to 2 might involve decarbonylation and PMe3/PhC≡CPh exchange.
