Synthesis, nuclear magnetic resonance, and X-ray investigations of 1,10-diazacyclooctadeca-2,9-dione
作者:P. Sałański、J. W. Krajewski、P. Gluziński、S. Kasprzyk、T. Stankiewicz、J. Jurczak
DOI:10.1007/bf01161064
日期:1991.4
The structure of the title compound has been investigated in the solid state and in solution by X-ray and NMR methods, respectively. The crystals are triclinic, space group P1BAR, with cell dimensions: a = 9.616(5), b = 9.923(9), c = 10.21(1) angstrom, alpha = 118.42(4)-degrees, beta = 96.10(5)-degrees, gamma = 94.77(5)-degrees. The structure was solved by direct methods, and refined against 3051 unique reflections by a full-matrix, least-squares procedure, giving R = 0.049. A twofold symmetry element in the molecule, found from H-1-NMR investigations, has been established by X-ray investigations to be an approximate twofold symmetry axis, bisecting the C(5)-C(6) and C(14)-C(15) bonds.