Structural studies of three isomeric forms of heterocyclic N(4)-substituted thiosemicarbazones and two nickel(II) complexes
作者:Douglas X. West、Gordon A. Bain、Ray J. Butcher、Jerry P. Jasinski、Yu Li、Roman Y. Pozdniakiv、Jesús Valdés-Martínez、Rubén A. Toscano、Simón Hernández-Ortega
DOI:10.1016/0277-5387(95)00298-7
日期:1996.2
Abstract Three structural forms have been isolated among four 2-formyl- and 2-acetylpyridine N(4)-substituted thiosemicarbazones reported. 2-Formylpyridine N(4)-methylthiosemicarbazone and 2-acetylpyridine N(4)-ethylthiosemicarbazone both exist as nonhydrogen bonding E isomers. 2-Formylpyridine 3-azabicyclo[3.2.2]nonylthiosemicarbazone crystallies as a hydrogen bondung Z isomer. The yellow 2-acetylpyridine
摘要报道了四个2-甲酰基和2-乙酰基吡啶N(4)-取代的硫代半氨基唑酮中已分离出三种结构形式。2-甲酰基吡啶N(4)-甲基硫代氨基脲和2-乙酰基吡啶N(4)-乙基硫代氨基脲均以非氢键结合的E异构体形式存在。2-甲酰基吡啶3-氮杂双环[3.2.2]壬基硫代半碳酸盐结晶为氢键结合的Z异构体。黄色的2-乙酰基吡啶3-六亚甲基亚甲基硫代半碳酸盐通过分叉的氢键排列结晶,其中N(3)氢正式位于N(2),使其互变异构为其他两种形式。包括含有2-甲酰基吡啶3-氮杂双环[3.2.2]壬基硫代半脲和乙酰基吡嗪3-六亚甲基亚氨基硫代半脲的单阴离子的四配位镍(II)配合物的结构。