83152-07-2Relevant academic research and scientific papers
ALKINYLPHOSPHINHALTIGE SUBSTITUTIONSPRODUKTE VON CHROM- UND WOLFRAM-HEXACARBONYL
Hengefeld, A.,Nast, R.
, p. 151 - 156 (2007/10/02)
The photochemical preparation of CC6H5)n(C6H5)3-n>, cis-CC6H5)n(C6H5)3-n> (M = Cr, W; n = 1,2,3) and fac-CC6H5)(C6H5)2)3> by the corresponding substitution reactions of the hexacarbonyls is described.The IR and Ra
Pentacarbonyl[tris(phenylethynyl)phosphine]chromium(0), Cr(CO)5P(C≡CPh)3: Spectral, structural, and MO characteristics
Hengefeld, Axel,Kopf, Jürgen,Render, Dieter
, p. 114 - 121 (2008/10/08)
The crystal and molecular structures of Cr(CO)5P(C≡CPh)3 have been determined (Rw = 0.057). The complex crystallizes in space group P1 with a = 1095.8 (6) pm, b = 1656.2 (8) pm, c = 1689.4 (8) pm, α = 101.34 (4)°, β = 108.97 (4)°, and γ = 105.76 (5)°. The ligand strength (σ donor and π acceptor capability) of P(C≡CPh)1 relative to that of PPh3 and P(OPh)3 is discussed on the basis of structural data, spectroscopic parameters (IR, 31P NMR of W(CO)5P(C≡CPh)3), and SCCCMO calculations carried out on C≡CH- and P(C≡CH)3. P(C≡CPh)3 is considered a strong σ-interacting ligand (mainly via P(3pz)) but only a moderate π acceptor for Cr → P(3d) delocalization. An approach is made to explain structural and spectral features through direct π*(CO) → π*(C≡C) interaction.
