The diammoniates of dipotassiumtetraethinylozincate and -cadmate:: K2M(C2H)4•2NH3 (M = Zn, Cd)
The diammoniates of dipotassiumtetraethinylozincate and -cadmate:: K2M(C2H)4•2NH3 (M = Zn, Cd)
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DOI：
10.1021/ic034629p
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发表时间：
2003-12-01
影响因子：
4.6
通讯作者：
Ruschewitz, U
中科院分区：
文献类型：
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作者：
Cremer, U;Pantenburg, I;Ruschewitz, U
以K2 Zn（CN）（4）和KC 2 H为原料，在液氨中反应，得到二氨化产物K2 Zn（C2 H）（4）·2NH（3）。K2 Cd（C2 H）（4）·2NH（3）是通过在液氨中使KCl、Cd（NH 2）（2）和乙炔反应而合成的。在低温下（T = 170 K）用X射线单晶衍射法测定了这些化合物的晶体结构。这两种化合物都属于单斜晶系，空间群为12/a（No.15），Z = 4。K2 Zn（C2 H）（4）.2NH（3）：a = 7.289（1）埃，B = 12.765（2）埃，c = 14.066（2）埃，β = 98.11（2）度。K2 Cd（C2 H）（4）.2NH（3）：a = 7.444（1）埃，B = 12.619（3）埃，c = 14.304（2）埃，β = 98.94（1）度。特征结构基序是四面体[M（C2 H）（4）]（2-）碎片（M = Zn，Cd）和以钾离子为中心的边缘共享扭曲（C2 H）（6）八面体的锯齿形链。这些锯齿形链由第二种晶体学上不同的钾离子连接，钾离子也与两个氨分子结合。
By reaction of KC2H and K2Zn(CN)(4) in liquid ammonia, the diammoniate K2Zn(C2H)(4).2NH(3) was obtained. K2Cd(C2H)(4).2NH(3) was synthesized by reacting KC2H, Cd(NH2)(2), and acetylene in liquid ammonia. The crystal structures of the air and temperature sensitive compounds were determined by X-ray single crystal diffraction at low temperatures (T = 170 K). Both compounds crystallize in the monoclinic space group 12/a (No. 15) with Z = 4. K2Zn(C2H)(4).2NH(3): a = 7.289(1) Angstrom, b = 12.765(2) Angstrom, c = 14.066(2) Angstrom, beta = 98.11(2)degrees. K2Cd(C2H)(4).2NH(3): a = 7.444(1) Angstrom, b = 12.619(3) Angstrom, c = 14.304(2) Angstrom, beta = 98.94(1)degrees. Characteristic structural motifs are tetrahedral [M(C2H)(4)](2-) fragments (M = Zn, Cd) and zigzag chains of edge sharing distorted (C2H)(6) octahedra centered by potassium ions. These zigzag chains are connected by a second type of crystallographically distinct potassium ions that also bind to two ammonia molecules.