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)
作者:Jerry P. Jasinski、M. K. Bharty、N. K. Singh、S. K. Kushwaha、Ray J. Butcher
DOI:10.1007/s10870-010-9824-5
日期:2011.1
The title compounds C7H8ClN3O2S, (I), and C9H10ClN3O4S2, (II), both crystallize in monoclinic space group P21 /c with unit cell parameters (I) a = 7.9402(7), b = 10.6312(9), c = 11.7626(10), Å, β = 99.271(5)°, Z = 4 and (II) a = 5.1439(2), b = 9.0636(4), c = 27.1814 (7), Å, 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···O hydrogen 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, (C9H10N3S2)+(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. The crystal structures of 5-Pyridine 4-yl-3H-(1,3,4) oxadiazole-2 thione hydrochloride monohydrate, C7H8ClN3O2S, (I), and 4 [5-Ethylsulfanyl)-(1,3,4) thiadiazole-2-yl]-pyridinium perchlorate, C9H10ClN3O4S2, (II) are investigated. Both molecules crystallize in the monoclinic space group P21 /c. Crystal packing in (I) is stabilized by strong N–H···O hydrogen 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 cation–anion pairs, (C9H10N3S2)+(ClO4)−, containing strong intermolecular N–H···O hydrogen bonds and weak C–H···O and N–H···O intermolecular interactions operating between the ionic species which form a cooperative hydrogen-bonded, infinite chain O–H···O–H···O–H network which generates a sheet motif structure in the unit cell. The geometric and packing parameters of both structures are described and compared to a MOPAC AM1 computational calculation.
标题化合物C7H8ClN3O2S(I)和C9H10ClN3O4S2(II)均结晶在单斜晶P21/c空间群,单位胞参数(I)a=7.9402(7)、b=10.6312(9)、c=11.7626(10)埃,β=99.271(5)°,Z=4;(II)a=5.1439(2)、b=9.0636(4)、c=27.1814(7)埃,β=95.116(2)°,Z=4。在(I)中,分子由5-吡啶-4-基团连接到(1,3,4)氧二唑-2硫酮盐酸盐一水合物中位置5处的碳原子。氧二唑和吡啶环的平均平面之间的角度是9.6(6)°。(I)中的晶体堆积由强的N–H···O氢键与溶剂水分子和弱的O–H···Cl、O–H···S、N–H···Cl分子间相互作用稳定。化合物(II)的晶体结构由4个[5-乙硫基)-(1,3,4)噻二唑-2-基]-吡啶高氯酸盐,(C9H10N3S2)+(ClO4)−,阴离子-阳离子对组成,包含强的分子间N–H···O氢键和弱的C–H···O和N–H···O分子间相互作用,在离子间形成协作的氢键,无限链O–H···O–H···O–H网络,在单位胞中生成一个片状结构。还由弱的分子间Cg···Cg π–π和Cl–O···Cg π-环相互作用提供额外的分子堆积稳定性的支持。对每种化合物的几何优化MOPAC AM1计算提供了对其各自晶体结构特征的支持。5-吡啶-4-基-3H-(1,3,4)氧二唑-2-硫酮盐酸盐一水合物,C7H8ClN3O2S,(I)和4 [5-乙硫基)-(1,3,4)噻二唑-2-基]-吡啶高氯酸盐,C9H10ClN3O4S2,(II)的晶体结构被研究。两种分子均结晶在单斜晶P21/c空间群。(I)中的晶体堆积由强的N–H···O氢键与溶剂水分子和弱的O–H···Cl、O–H···S、N–H···Cl分子间相互作用稳定。化合物(II)的晶体结构由阴离子-阳离子对,(C9H10N3S2)+(ClO4)−,包含强的分子间N–H···O氢键和弱的C–H···O和N–H···O分子间相互作用,在离子间形成协作的氢键,无限链O–H···O–H···O–H网络,在单位胞中生成一个片状结构。两种结构的几何和堆积参数被描述并比较到一个MOPAC AM1计算。