Phosphine, triphenyl geometry

The geometry of the central core P-atom of (116) was found to be pyramidal, as might be expected for a (p-substituted triphenyl)-a X -phosphine, while that for the N-based systems was trigonal planar (in agreement with the pla-... 

Dunne, B.J., Morris, R.B. and Orpen, A.G. (1991) Structural systematics. Part 3. Geometry deformations in triphenyl-phosphine fragments a test of bonding theories in phosphine complexes. J. Chem. Soc., Dalton Trans., 653. 

Reaction of the dioxygen adduct of [RhCl(PPh3 )3 ] with Hacac in room temperature benzene leads to a hydroperoxo complex of Rh111, identified as [Rh(PPh3)2(OOH)Cl(acac)]. In the presence of triphenylphosphine, triphenyl phosphite is released, with the formation of [Rh(PPh3)2(OH)-Cl(acac)], with trans phosphines (geometries were determined by 31P NMR)."37... 

Triphenyl phosphine coordinates germanium(II) chloride or iodide " to form 1 1 complexes with tbp geometry at the metal and bond lengths Ge—P 2.511 A and 2.507 A, respectively. These complexes are in some ways analogous to ylides (R 3P = CR ) and have some properties in common with these lighter homologues. 

Complex 8.109 has a distorted octahedral geometry with trans triphenyl-phosphine and cis acetonitrile ligands. The Os-B distance for this complex [2.094(5) A] is longer than that found in 8.104, a reflection both of the pres-... 

In gold clusters of the type [Aum(PR3)m] as the triphenyl phosphine derivatives shown schematically in Fig. 2.35, the electron count depends critically on both the nuclearity and geometry of the species. 

G. Simonneaux et al. (57) published the synthesis and complexation to ruthenium(II) and iron(in) m 5(9-tetraphenylporphyrins of two new fluorinated alkyl isocyanides, 2-monofluoroethyl isocyanide and 2,2,2-trifluoroethyl isocyanide. A new synthesis of trifluoromethyl isocyanide, pentafluoroethyl isocyanide and heptafluoropropyl isocyanide from R-N=Cp2 (R = CF3, C2F5, C3F7) using triphenyl phosphine has been reported (58). Geometries and HOMO and LUMO energies of fluorinated vinyl isocyanides have been calculated (59). Pentacarbonyl chromium complexes of both isomers of the first fluorinated diisocyanide, l,2-diisocyano-l,2,3,3,4,4-hexafluoro cyclobutane have been isolated from a [2+2] cycloaddition reaction of pentacarbonyl(trifluorovinyl isocyanide) chromium. The structure of the cis isomer has been elucidated by X-ray crystallography (60),... 

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