碘化物
卤素
化学
结晶学
溴化物
金属
碘化铵
铜
红外光谱学
卤化物
三角晶系
氯化物
晶体结构
配体(生物化学)
无机化学
烷基
有机化学
受体
生物化学
作者
Graham A. Bowmaker,Michael I. Bruce,Brian W. Skelton,Neil Somers,Allan H. White
标识
DOI:10.1002/zaac.200700051
摘要
Abstract The complexes [Cu 2 Br 4 ] 2− , [Cu 2 I 4 ] 2− , [Cu 2 I 2 Br 2 ] 2− , [Cu 2 I 3 Cl] 2− , [Ag 2 Cl 4 ] 2− have been characterized as their isomorphous bis(triphenylphosphoranylidene)ammonium ([Ph 3 PNPPh 3 ] + = PNP + ) salts by single crystal structural determinations. All anions show the centrosymmetric doubly halogen‐bridged forms [XM(μ‐X) 2 MX] 2− with three‐coordinate metal atoms that have been observed in [M 2 X 4 ] 2− complexes with other large organic cations. In [Cu 2 I 2 Br 2 ] 2− the iodide ligands occupy the bridging positions and the bromide the terminal positions, while in [Cu 2 I 3 Cl] 2− , obtained in an attempt to prepare [Cu 2 I 2 Cl 2 ] 2− , two of the iodide ligands occupy the bridging positions with the third iodide and the chloride ligand occupying two statistically disordered terminal positions. In [Ag 2 Cl 4 ] 2− the distortion from ideal trigonal coordination of the metal atom is greater than in the copper complexes, but less than in other previously reported [Ag 2 Cl 4 ] 2− complexes with organic cations. The ν(MX) bands have been assigned in the far‐IR spectra, and confirm previous observations regarding the unexpectedly simple IR spectra of [Cu 2 X 4 ] 2− complexes.
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