CRYSTAL AND MOLECULAR-STRUCTURE OF 3,5-DIMETHYL-N-NITROSO-4-OXIMINO-2,6-DIPHENYL PIPERIDIN-4-ONE(DMNOH)

C19H21N3O2, M(r) = 323.4, triclinic, P1BAR, a = 9.877(2) angstrom, b = 10.587(2) angstrom, c = 8.309(2) angstrom, alpha = 96.96(1)-degree, b eta = 93.21(1)-degree, gamma = 94.13(1)-degree, V = 858.4 angstrom-3, Z = 2, D(calc) = 1.251 g cm-3, mu = 6.28 cm-1, F(000) = 344, T = 293 K , R = 0.059 and wR = 0.058 for 1720 observed reflections. The piperidi ne ring adopts distorted boat conformation. The phenyl rings (A and B) are oriented at angles of 70.4(2)-degrees and 89.8(1)-degree to the b est plane of the piperidine ring. The nitroso moiety exists in perpend icular orientation while the oximino group is in planar position with respect to the piperidine ring.