STRUCTURE OF A NEW FORM OF OCTAETHYLPORPHYRINATO(METHYL)RHODIUM(III)

Abstract

C37H47N4Rh, M(r) = 650.72, triclinic, P1BAR, a = 10.973 (1), b = 11.875 (1), c = 14.211 (1) angstrom, alpha = 108.03 (1), beta = 105.41 (1), gamma = 100.92 (1)-degrees, V = 1616.0 (7) angstrom 3, Z = 2, D(x) = 1.337 g cm-3, lambda(Mo K-alpha(1)) = 0.7093 angstrom, mu = 5.5 cm-1, F(000) = 684, T = 295 K, final R = 0.044 for 4775 reflections [F(o) > 3-sigma(F(o))]. The present structure is different from the one reported earlier [Takenaka, Syal, Sasada, Omura, Ogoshi & Yoshida (1976). Acta Cryst. B32, 62-65]: the Rh-C distance is somewhat shorter [1.970 (4) angstrom]; all the ethyl groups, except for a disordered one, are oriented toward the methyl group attached to Rh; the two nearest neighbors form a 'dimer' in which the Rh-Rh distance is 4.67 angstrom and the mean plane separation is 3.35 angstrom.