作者:D. F. Mullica、C. M. Garner、M. E. Prince、B. C. Mossman、E. L. Sappenfield
DOI:10.1007/bf01161333
日期:1992.10
The crystal and molecular structures of two configurational isomers of the title compound have been determined by three-dimensional, single-crystal X-ray diffractometry. Both (2S,5R)- and (2R,5R)-4-methylbenzenesulfonic acid-[5-methyl-2-(1-methylethyl)cyclohexylidene] hydrazide (hereafter referred to as menthone- and isomenthone-tosylhydrazone, or I and II, respectively) crystallize in the orthorhombic space group P2(1)2(1)2(1) (No. 19, D2(4)) with four formula units per cell and a = 5.209(1), b = 17.501(1), c = 20.154(1)angstrom and a = 5.281(1), b = 17.300(1), 20.422(1)angstrom, respectively. The phase problems were solved by direct methods and the respective final full-matrix least-squares refinements of 1767 and 3010 unique reflections converged to R = 0.046 and 0.052. In both structures. the toluenesulfonamide group occupies a position anti to the more substituted side of the cyclohexyl ring, the C(16)-C(11)-N(2) angles are significantly wider than 120', and each sulfonamide nitrogen (1) atom appears to exhibit a distorted trigonal pyramidal geometry. The structures differ in the positioning of the isopropyl and methyl substituents on the cyclohexane ring, with the trans isomer I having both groups equatorial, while the cis isomer II exhibits an axial isopropyl group. The molecules in the crystal lattice are held together by van der Waals forces. X-ray powder diffraction, conoscopic, infrared, and H-1 and C-13 NMR analyses have been performed.