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Synthesis and structure of p-chlorophenylhydrazone of 3-(methylthio)-5-propanoyl-1,2,4-triazine

机译:3-(甲硫基)-5-丙酰基-1,2,4-三嗪的对氯苯基hydr的合成与结构

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The reaction of 3-(methylthio)-5-propanoyl-1,2,4-triazine with p-chlorophenylhydrazine hydrochloride is completed within 5 min at room temperature in ethanol leading to p-chlorophenylhydrazone of 3-(methylthio)-5-propanoyl-1,2,4-triazine 1 in good yield. Title compound, 1 (R = C2H5, R-1 = Cl, Z = SCH3), C13H14N5SCl, crystallizes in the monoclinic system, space group P2(1), with cell constants a = 12.5206(6) Angstrom, b = 9.3122(8) Angstrom, c = 12.8524(9) Angstrom, and beta = 98.822(5)degrees, Z = 4, T = 293 K, D-cal = 1.381 g cm(-3). The structure was solved by direct methods and refined to R value of 0.0671 for 1,679 reflections. The molecule as a whole has an almost planar conformation and possesses (E) configuration with respect to the C=N double bond. The crystal structure is stabilized by a weak N(13)-H(13). . .N(2) intermolecular hydrogen bond and significant stacking, characteristic for pi -electron systems. [References: 13]
机译:3-(甲硫基)-5-丙酰基-1,2,4-三嗪与对氯苯肼盐酸盐的反应在室温下于乙醇中在5分钟内完成,生成3-(甲硫基)-5-丙酰基的对氯苯hydr -1,2,4-三嗪1具有良好的收率。标题化合物1(R = C2H5,R-1 = Cl,Z = SCH3),C13H14N5SCl在单斜晶系空间群P2(1)/ n中结晶,单元常数a = 12.5206(6)埃,b = 9.3122(8)埃,c = 12.8524(9)埃,β= 98.822(5)度,Z = 4,T = 293 K,D-cal = 1.381 g cm(-3)。通过直接方法解析结构,并针对1679次反射将其精炼为R值为0.0671。分子整体上具有几乎平面的构型,并且相对于C = N双键具有(E)构型。晶体结构通过弱的N(13)-H(13)得以稳定。 。 .N(2)分子间氢键和大量堆积,是π电子系统的特征。 [参考:13]

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