New anionic copper(I) dihalide cyclic guanidinate compounds with H-bonded chelating guanidinium cations

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• 作者：Gina M. Chiarella ; Doris Y. Melgarejo ; John P. Fackler Jr. ; ^{fackler@mail.chem.tamu.edu}
• 关键词：Copper(I) dihalide cyclic guanidinates ; Acid dependant synthesis of copper(I) compounds ; Guanidine&ndash ; guanidinium salts ; Chelated H-bonded guanidinium cations
• 刊名：Inorganica Chimica Acta
• 出版年：2012
• 期刊代码：40_00201693
• 类别：ch
• 出版时间：15 May, 2012
• 卷：386
• 期：Complete
• 页码：13-16
• 文件大小：501 K

摘要

Two new copper(I) dihalide cyclic guanidine salts have been synthesized and characterized structurally, (H₂hpp) [(Hhpp)CuCl₂], 1 and (H₂hpp) [(Hhpp)CuBr₂], 2, where Hhpp = (1,3,4,6,7,8-hexahydropyrimido[1,2-a]pyrimidine). Both compounds are isomorphous, crystallizing in the monoclinic space group P2(1)/c. They exhibit the very unusual feature of a trigonal planar copper(I) center tri-coordinated to a neutral cyclic guanidine with two halides in an anion and a cyclic guanidinium cation H-bonded as a chelate to the halides.