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Crystal Structure of Unsymmetrically N-nor-dehydroabietyl-N '-isopropyl Urea

机译:N-去脱氢枞基-N'-异丙基尿素的不对称晶体结构

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摘要

The title compound (C46H72N4O2, M-r = 713.08) [systematic name: 1-isopropyl-3-((1R,4aS,10aR)-7-isopropyl-1, 4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydrophenanthren-1-yl)urea] is a new derivative of dehydroabietic acid. It crystallized in the orthorhombic system, space group P2(1)2(1) 2(1) with cell dimensions of a = 9.5950(19) angstrom, b = 18.740(4) angstrom, c = 24.654(5) angstrom, V = 4,433.0(16) angstrom(3), Z = 4, D-c = 1.068 g/cm(3), lambda = 0.71073 angstrom, mu = 0.07 mm(-1), F(000) = 1,568, final R = 0.0777 and wR = 0.1731 for 2,048 observed reflections with I > 2 sigma(I). Two crystallorgraphically independent molecules with different conformations co-exist in the structure. Each molecule exhibit classic tricyclic hydrophenanthrene structure, the two cyclohexane rings form a trans ring junction with chair and half-chair conformations, respectively. The crystal is stabilized by intermolecule hydrogen bonds and the molecules are in a head-tail zigzag arrangement.
机译:标题化合物(C46H72N4O2,Mr = 713.08)[系统名称:1-异丙基-3-((1R,4aS,10aR)-7-异丙基-1,4a-二甲基-1,2,3,4,4a,9 ,, 10,10a-octahydrophenanthren-1-yl)urea]是脱氢松香酸的新衍生物。它在正交结构的空间群P2(1)2(1)2(1)中结晶,晶胞尺寸为a = 9.5950(19)埃,b = 18.740(4)埃,c = 24.654(5)埃,V = 4,433.0(16)埃(3),Z = 4,Dc = 1.068 g / cm(3),λ= 0.71073埃,mu = 0.07 mm(-1),F(000)= 1,568,最终R = 0.0777和对于I> 2 sigma(I)的2,048个观察到的反射,wR = 0.1731。具有不同构象的两个晶体学独立的分子共存于结构中。每个分子表现出经典的三环对菲结构,两个环己烷环分别形成具有椅和半椅构象的反式环连接。晶体通过分子间的氢键稳定,分子呈首尾曲折排列。

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