The crystal and molecular structure of a new polymorph of carbonylhydridotris(triphenylphosphine)rhodium(I) having a Rh-H stretching absorption at 2013 cm-1

Abstract

A new polymorph of HRh(CO)(PPh3)3, with a υRh-H of 2013 cm-1, has been isolated by crystallization from tert-butyl methyl ether/tetrahydrofuran. The crystals are monoclinic (space group P21/n), with a=21.48(2) Å, b=14.92(2)Å, c=14.52(1)Å, β=107.95(8)°. A final R value of 0.065 was obtained using 2243 reflections which had Inet>2.5σ(Inet). The structure of the new polymorph has a similar coordination geometry to the known polymorph, but a different conformation of one of the phenyl rings. © 1993 Plenum Publishing Corporation.