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首页> 外文期刊>Journal of chemical crystallography >Crystal structure and conformational analysis of N-formyl and N-nitroso derivatives of piperidinone
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Crystal structure and conformational analysis of N-formyl and N-nitroso derivatives of piperidinone

机译:哌啶酮的N-甲酰基和N-亚硝基衍生物的晶体结构和构象分析

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摘要

Single crystal X-ray studies for N-formyl-2, 6-diortho chlorophenyl-3, 5-dimethyl piperidin-4-one (FOCDMPO) and N-nitroso-2, 6-di(3', 4', 5'-trimethoxyphenyl)-3, 5-dimethyl piperidin-4-one (NTMPO) are reported. Crystals of FOCDMPO and NTMPO belong to the monoclinic space groups P2_1 and C2/c, respectively. FOCDMPO: a = 9.147(2), b = 14.586(3), c = 13.665(5) A and #beta# = 101.68(2) deg; NTMPO: a = 38.52(2), b = 13.727(5), c = 9.564(3) A and #beta# = 98.60(1) deg. In both the structures, the piperidine ring adopts a boat conformation with slight distortion. In FOCDMPO, one of the phenyl and methyl groups are in axial positions while the other phenyl and methyl groups are in equatorial orientations. In NTMPO, the situation is reversed. The molecules are stabilized by weak intermolecular C-H...O interactions in addition to van der Waals forces.
机译:N-甲酰基-2、6-二邻氯苯基-3、5-二甲基哌啶-4-酮(FOCDMPO)和N-亚硝基-2、6-二(3',4',5'的单晶X射线研究报道了-(三甲氧基苯基)-3、5-二甲基哌啶-4-酮(NTMPO)。 FOCDMPO和NTMPO的晶体分别属于单斜空间群P2_1 / n和C2 / c。 FOCDMPO:a = 9.147(2),b = 14.586(3),c = 13.665(5)A和#beta#= 101.68(2)deg; NTMPO:a = 38.52(2),b = 13.727(5),c = 9.564(3)A,#beta#= 98.60(1)度。在这两种结构中,哌啶环均具有舟形构型,并稍有变形。在FOCDMPO中,苯基和甲基之一位于轴向位置,而另一个苯基和甲基位于赤道方向。在NTMPO中,情况相反。除范德华力外,分子间的弱分子间C-H ... O相互作用使分子稳定。

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