The crystal structure of solvated hydridochloro(trichlorosilyl)bis(triphenylphosphine)rhodium, RhHCl(SiCl3)(P(C6H5)3)2·xSiHCl3, has been determined by X-ray diffraction methods. The compound crystallizes in the space group Ci1-P1 of the triclinic system. There are two molecules of RhHCl(SiCl3)(P(C6H5)3)2 in a unit cell of dimensions a = 11.727 (5) Å, b = 12.952 (6) Å, c = 13.365 (5) Å, a = 104.65 (2)°, β = 98.08 (2)°, γ = 94.43 (2)°. The structuee has been refined by least-squares methods to a conventional R factor of 0.064 over 2485 counter-diffractometric data. It consists of discrete monomeric molecules of RhHCl(SiCl3)(P(C6H6)3)2 and SiHCl3. The latter are disordered over four different sites; the SiHCl3:Rh ratio is 0.397 (7). The rhodium coordination polyhedron may be described as a highly distorted trigonal bipyramid, with trans phosphines at the apices and H, Cl, and SiCl3 in the trigonal plane. Alternatively, the coordination about the formally d6 Rh(III) ion is distorted octahedral if one chooses to include at the sixth coordination site the contact of 2.79 Å with an ortho-hydrogen atom on a phenyl ring of a triphenylphosphine group. The short Rh–Si distance of 2.203 (4) Å is consistent with back-donation of electrons from the metal to the silyl group.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry