首页> 外文期刊>Journal of chemical crystallography >5-pyridine 4-yl-3H-(1,3,4) oxadiazole-2 thione hydrochloride monohydrate, (I), and 4 [5-ethylsulfanyl)-(1,3,4) thiadiazole-2-yl]-pyridinium perchlorate, (II)
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5-pyridine 4-yl-3H-(1,3,4) oxadiazole-2 thione hydrochloride monohydrate, (I), and 4 [5-ethylsulfanyl)-(1,3,4) thiadiazole-2-yl]-pyridinium perchlorate, (II)

机译:5-吡啶4-基-3H-(1,3,4)恶二唑-2硫代盐酸盐一水合物(I)和4 [5-乙基硫烷基]-(1,3,4)噻二唑-2-基]-吡啶鎓高氯酸盐(II)

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摘要

The title compounds C_7H_8ClN_3O 2S, (I), and C_9H_(10)ClN_3O _4S_2, (II), both crystallize in monoclinic space group P2_(1/c) with unit cell parameters (I) a = 7.9402(7), b = 10.6312(9), c = 11.7626(10),?, β = 99.271(5)°, Z = 4 and (II) a = 5.1439(2), b = 9.0636(4), c = 27.1814 (7), ?, β = 95.116(2)°, Z = 4. In (I) the molecule consists of a 5-pyridine-4-yl group bonded to the carbon atom at the 5 position of (1, 3, 4) oxadiazole-2 thione hydrochloride monohydrate. The angle between the mean planes of the oxadiazole and pyridine rings is 9.6(6)°. Crystal packing in (I) is stabilized by strong N-H?Ohydrogen bonds in concert with a solvent water molecule and weak O-H?Cl, O-H?S, N-H?Cl intermolecular interactions. The crystal structure of compound (II) consists of 4 [5-ethylsulfanyl)-(1, 3, 4) thiadiazole-2-yl]- pyridinium perchlorate, (C_9H_(10)N_3S _2)~+(ClO4)~-, cation-anion pairs, containing strong intermolecular N-H?O hydrogen bonds and weak C-H?O and N-H?O intermolecular interactions operating between the ionic species that form a cooperative hydrogen-bonded, infinite chain O-H?O-H?O- H network which generates a sheet motif structure in the unit cell. It is also supported by weak intermolecular Cg?Cg π-π and Cl-O?Cg π-ring interactions which gives additional support to molecular packing stability in the unit cell. Geometry optimized MOPAC AM1 computational calculations on each compound provides support to the structural features in their respective crystal structures.
机译:标题化合物C_7H_8ClN_3O 2S(I)和C_9H_(10)ClN_3O _4S_2,(II)均在单斜晶空间群P2_(1 / c)中以晶胞参数(I)结晶a = 7.9402(7),b = 10.6312(9),c = 11.7626(10),?,β= 99.271(5)°,Z = 4和(II)a = 5.1439(2),b = 9.0636(4),c = 27.1814(7), α,β= 95.116(2)°,Z =4。在(I)中,分子由与(1,3,4)恶二唑-的5位碳原子键合的5-吡啶-4-基组成。 2硫代盐酸盐一水合物。恶二唑和吡啶环的平均平面之间的角度为9.6(6)°。 (I)中的晶体堆积通过强的N-H 2 O氢键与溶剂水分子和弱的O-H 2 Cl,O-H 2 S,N-H 2 Cl分子间相互作用而稳定。化合物(II)的晶体结构由4 [5-乙基硫烷基]-(1,3,4)噻二唑-2-基]-高氯酸吡啶鎓,(C_9H_(10)N_3S _2)〜+(ClO4)〜-,阳离子-阴离子对,含有强分子间的NH2O氢键以及弱的CH2O和NH2O分子间的相互作用,这些离子之间形成形成氢键合的,无限链的OH?OH?O-H网络,从而形成一个晶胞中的片状基序结构。分子间的Cg2Cgπ-π和Cl-O2Cgπ-环之间的相互作用较弱,这也为单位晶格中的分子堆积稳定性提供了额外的支持。对每种化合物进行几何优化的MOPAC AM1计算计算可为其各自晶体结构中的结构特征提供支持。

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