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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >Pyridine 1:1 adducts of urea ( Z Z ′ = 1) and thiourea ( Z Z ′ = 8)
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Pyridine 1:1 adducts of urea ( Z Z ′ = 1) and thiourea ( Z Z ′ = 8)

机译:吡啶1:1尿素加合物(Z Z'= 1)和硫脲(Z Z'= 8)

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摘要

During our studies of urea and thiourea adducts, we noticed that no adducts with unsubstituted pyridine had been structurally investigated. The 1:1 adduct of pyridine and urea, C 5 H 5 N·CH 4 N 2 O, crystallizes in the P 2 1 / c space group with Z ?= 4. The structure is of a standard type for urea adducts, whereby the urea molecules form a ribbon, parallel to the a axis, consisting of linked R 2 2 (8) rings, and the pyridine molecules are attached to the periphery of the ribbon by bifurcated (N—H…) 2 N hydrogen bonds. The 1:1 adduct of pyridine and thiourea, C 5 H 5 N·CH 4 N 2 S, crystallizes in the P 2 1 / n space group, with Z = 32 ( Z ′ = 8). The structure displays similar ribbons to those of the urea adduct. There are two independent ribbons parallel to the b axis at z ? 0 and , and three at z ? and ; the latter are crosslinked to form a layer structure by additional long N—H…S interactions, which each formally replace one branch of a bifurcated hydrogen‐bond system.
机译:在我们对尿素和硫脲加合物的研究期间,我们注意到没有在结构上研究未取代的吡啶的加合物。 吡啶和尿素的1:1加合物,C 5 H 5 N·CH 4 N 2 O,在P 2 1 / C空间基团中结晶,Zα= 4.该结构是尿素加合物的标准类型,由此 尿素分子形成与轴线平行的带,由连接的R 2 2(8)环组成,并且通过分叉(N-H ...)2N氢键将吡啶分子连接到带的周边。 1:1加合物的吡啶和硫脲,C 5 H 5 N·CH 4 N 2 S,在P 2 1 / N空间组中结晶,Z = 32(Z'= 8)。 该结构显示出与尿素加合物的类似带。 在z的B轴平行有两个独立的丝带? 0和,和三个在z? 和 ; 后者通过额外的长N-H ...... S相互作用来交联以形成层结构,每个相互作用各自替换分叉的氢键系统的一个分支。

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