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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Crystal structure and thermal behaviour of the mixed-valent basic mercury nitrate Hg-2(I)(OH)(NO3)center dot(HgO)-O-II
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Crystal structure and thermal behaviour of the mixed-valent basic mercury nitrate Hg-2(I)(OH)(NO3)center dot(HgO)-O-II

机译：混合价碱性硝酸汞Hg-2（I）（OH）（NO3）中心点（HgO）-O-II的晶体结构和热行为

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摘要

Single crystals of the hitherto unknown compound Hg-2(OH)(NO3)center dot HgO were obtained unintentionally during hydrothermal phase formation experiments in the system Ag-Hg-As-O. Hg-2(OH)(NO3)center dot HgO (orthorhombic, Pbca, Z = 8, a = 6.4352(8), b = 11.3609(14), c = 15.958(2) angstrom, 1693 structure factors, 83 parameters, RI[F-2 > 2 sigma(F-2)] = 0.0431) adopts a new structure type and is composed of two types of mercury-oxygen zig-zag-chains running perpendicular to each other and of intermediate nitrate groups. One type of chains runs parallel [010] and consists of (Hg-Hg-OH) units with a typical Hg-Hg distance of 2.5143(10) angstrom for the mercury dumbbell, whereas the other type of chains runs parallel [100] and is made up of (O-Hg-O) units with short Hg-O distances of about 2.02 angstrom. Both types of chains are concatenated by a common 0 atom with a slightly longer Hg-O distance of 2.25 angstrom. The three-dimensional assembly is completed by nitrate groups whose O atoms show Hg-O distances > 2.80 angstrom. Weak hydrogen bonding between the OH group and one oxygen atom belonging to the nitrate group stabilizes this arrangement. Hg-2(OH)(NO3)center dot HgO decomposes above 200 degrees C to HgO.
机译：在系统Ag-Hg-As-O的水热相形成实验中，无意间获得了迄今未知的化合物Hg-2（OH）（NO3）中心点HgO的单晶。 Hg-2（OH）（NO3）中心点HgO（斜方晶，Pbca，Z = 8，a = 6.4352（8），b = 11.3609（14），c = 15.958（2）埃，1693结构因子，83个参数， RI [F-2> 2 sigma（F-2）] = 0.0431）采用一种新的结构类型，它由两种相互垂直延伸的汞-氧之字形链和中间硝酸盐基团组成。一种类型的链平行运行[010]，由（Hg-Hg-OH）单元组成，汞哑铃的典型Hg-Hg距离为2.5143（10）埃，而另一种类型的链平行运行[100]和由（O-Hg-O）单元组成，其Hg-O距离短，约为2.02埃。两种类型的链均由一个普通的0原子连接，其Hg-O距离略长，为2.25埃。三维组装由其O原子显示Hg-O距离> 2.80埃的硝酸根基团完成。 OH基团和属于硝酸盐基团的一个氧原子之间的弱氢键稳定了该排列。 Hg-2（OH）（NO3）中心点HgO在200摄氏度以上分解为HgO。

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