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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >1, 2, 4-Diazaphosphole und 1, 2, 4-Diazaarsole: Ringstruktur und Struktur wasserstoffbrucken-gebundener Paare und Helices
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1, 2, 4-Diazaphosphole und 1, 2, 4-Diazaarsole: Ringstruktur und Struktur wasserstoffbrucken-gebundener Paare und Helices

机译:1,2,4-二氮杂磷醚和1,2,4-二氮杂ar:环结构以及氢键对和螺旋结构

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摘要

Among the large family of azaphospholes 1, 2, 4-diazaphospholes feature a particularly stable ring system. 3, 5-Unsubstituted and 3, 5-equally substituted 1, 2, 4-diazaphospholes and -diazaarsoles are best made from 1, 3-bis (dimethylamino)-2-phospha/arsaallyl chlorides and hydrazines. This way four examples for single crystal X-ray structure investigations were prepared: The unsubstituted 1, 2, 4-diazaphosphole 2 and -diazaarsole 4, the N-substituted 1-(2-pyridyl) 1, 2, 4-diazaphosphole 1, and the C-substituted 3, 5-di-tert-butyl 1, 2, 4-diazaphosphole 3. They all possess planar rings with small angles at P (86 deg) and As (81 deg). The N-unsubstituted molecules are connected to each other by NH...N hydrogen bonds forming in case of the isotypic compounds 2 and 4 a helix along a crystallographic axis and in case of compound 3 for steric reasons a dimer. The structures of the aggregates found are compared to those of pyrazoles.
机译:在庞大的氮杂唑家族中,1,2,4-二氮杂唑具有特别稳定的环系统。 3,5-未取代和3,5-等取代的1,2,4-二氮杂磷和-diazaarsoles最好由1,3-双(二甲基氨基)-2-磷/芳基烯丙基氯化物和肼制成。这样,制备了四个用于单晶X射线结构研究的例子:未取代的1,2,4,4-二氮杂磷2和-diazaarsolesole 4,N-取代的1-(2-吡啶基)1,2,2,4-二氮杂磷1,和C-取代的3,5-二叔丁基1、2,4-二氮杂磷腈3。它们都具有平面环,在P(86度)和As(81度)处有小角度。 N-未取代的分子通过NH ... N氢键相互连接,在同型化合物2和4的情况下,沿结晶轴形成螺旋,在化合物3中,由于空间原因,形成二聚体。将发现的聚集体的结构与吡唑的结构进行比较。

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