Synthesis and crystal structure of (NH4)3[Mn(NO 3)4]NO3, (NH4) 2[Zn(NO3)4], and (NH4) 3[Ni2(NO3)7] ammonium nitratometallates
Synthesis and crystal structure of (NH4)3[Mn(NO 3)4]NO3, (NH4) 2[Zn(NO3)4], and (NH4) 3[Ni2(NO3)7] ammonium nitratometallates
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(NH4)3[Mn(NO 3)4]NO3、(NH4) 2[Zn(NO3)4]和(NH4) 3[Ni2(NO3)7]硝基金属酸铵的合成和晶体结构
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发表时间：
2003
期刊：
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通讯作者：
S. Troyanov
中科院分区：
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作者：
I. Morozov;A. A. Fedorova;T. A. Rodionova;S. Troyanov
将M（NO3）2·6 H2O与过量NH 4 NO3的混合物在100-140° C下加热2-3天，得到结晶硝酸铵（NH 4）3 [Mn（NO3）4 ] NO3（I），（NH 4）2 [Zn（NO3）4 ]（II）和（NH 4）3 [Ni 2（NO3）7 ]（III）。用X射线晶体学研究了这些化合物的晶体结构。结构I由NH + 4阳离子、NO - 3阴离子和配合物[Mn（NO3）4 ] 2 -阴离子组成。[Mn（NO3）4 ] 2 -阴离子中的锰原子具有由四个双齿硝酸根基团的八个O原子形成的扭曲的十二面体环境。结构II由NH + 4阳离子和两种类型的[Zn（NO3）4 ] 2 -阴离子组成，其中一种阴离子的Zn原子处于由两个单齿和两个双齿硝酸根的氧原子形成的扭曲八面体环境中。另一种阴离子的Zn原子处于由四个不对称双齿NO - 3基团的八个O原子形成的扭曲十二面体环境中。结构III由[Ni 2（NO3）7 ] 3 n-n组成的无限锯齿形带和位于其间的NH + 4阳离子组成。手是以[Ni（NO3）3 ] 3 -阴离子为节点的双链。Ni原子的配位环境是两个末端（单齿和双齿）O原子和三个桥接硝酸根基团的扭曲八面体，其将每个阴离子与三个相邻阴离子连接。这是第一个带状的硝酸金属盐阴离子。
Crystalline ammonium nitratometallates (NH 4 ) 3 [Mn(NO 3 ) 4 ]NO 3 (I), (NH 4 ) 2 [Zn(NO 3 ) 4 ] (II), and (NH 4 ) 3 [Ni 2 (NO 3 ) 7 ] (III) were obtained by heating mixtures of M(NO 3 ) 2 .6H 2 O with an excess of NH 4 NO 3 at 100-140°Cfor 2-3 days. The crystal structures of these compounds were studied by X-ray crystallography. Structure I consists of NH + 4 cations, NO - 3 anions, and complex [Mn(NO 3 ) 4 ] 2 - anions. Manganese atoms in the [Mn(NO 3 ) 4 ] 2 - anions have a distorted dodecahedral environment formed by the eight O atoms of four bidentate nitrate groups. Structure II is built of NH + 4 cations and two types of [Zn(NO 3 ) 4 ] 2 - anions, one of which has Zn atoms in a distorted octahedral environment formed by the oxygen atoms of two monodentate and two bidentate nitrate groups. The Zn atom of another anion is in a distorted dodecahedral environment formed by the eight O atoms of four asymmetrically bidentate NO - 3 groups. Structure III consists of infinite zigzag bands of the [Ni 2 (NO 3 ) 7 ] 3 n - n composition and NH + 4 cations residing in between. The hands are double chains with [Ni(NO 3 ) 3 ] 3 - anions in nodes. The coordination environment of a Ni atom is a distorted octahedron of O atoms of two terminal (mono- and bidentate) and three bridging nitrate groups, which link each anion with three adjacent anions. These are the first ribbon nitratometallate anions.