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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Strong attraction of caffeine to the mercurous dumbbell in the salt [Hg-2(Caf)(2)](ClO4)(2)(H2O)(2)
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Strong attraction of caffeine to the mercurous dumbbell in the salt [Hg-2(Caf)(2)](ClO4)(2)(H2O)(2)

机译:咖啡因对盐[Hg-2(Caf)(2)](ClO4)(2)(H2O)(2)中的汞哑铃有很强的吸引力

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摘要

Colourless single crystals of the caffeine adduct of mercurous perchlorate dihydrate, [Hg-2(Caf)(2)](ClO4)(2)(H2O)(2),were grown from aqueous solutions of mercurous perchlorate and caffeine by isothermal evaporation at ambient temperature. The crystal structure (monoclinic, P2(1), Z = 4, a = 1628.0(2), b = 780.4(1), c = 2229.6(3) pm, beta = 99.84(1)degrees, R-1(all data) = 0.0894) contains [trans-Caf-Hg-Hg-Caf](2+) cations with a Hg-Hg distance of 250.88(6) pm, Hg-N (bond) distances of 214.4(6) and 215.1(6) pm and Hg-Hg-N angles of 176.9(2) and 165.1(2)degrees, respectively. These cations are attached via weak Hg-O contacts to dimers which are further arranged to leave large channels into which one crystal water molecule is included. The second water molecule and the two perchlorate anions are weakly attracted to one Hg atom.
机译:高氯酸汞和咖啡因的水溶液通过等温蒸发,在高氯酸二氢汞的二水合物[Hg-2(Caf)(2)](ClO4)(2)(H2O)(2)的咖啡因加合物中形成无色单晶。环境温度。晶体结构(单斜晶,P2(1)/ n,Z = 4,a = 1628.0(2),b = 780.4(1),c = 2229.6(3)pm,β= 99.84(1)度,R-1 (所有数据)= 0.0894)包含[trans-Caf-Hg-Hg-Caf](2+)阳离子,其Hg-Hg距离为250.88(6)pm,Hg-N(键)距离为214.4(6), 215.1(6)pm和Hg-Hg-N角分别为176.9(2)和165.1(2)度。这些阳离子通过弱的Hg-O触点连接到二聚体,该二聚体进一步排列以留下较大的通道,其中包含一个晶体水分子。第二个水分子和两个高氯酸根阴离子被弱吸引到一个Hg原子上。

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