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首页> 外文期刊>Organometallics >Halogen oxidation reactions of (C5Ph5)Cr(CO)(3) and Lewis base addition to [(C5Ph5)Cr(mu-X)X](2): Electrochemical, magnetic, and Raman spectroscopic characterization of [(C5Ph5)CrX2](2) and (C5Ph5)CrX2(THF) (X = Cl, Br, I) and X-ray crystal structure
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Halogen oxidation reactions of (C5Ph5)Cr(CO)(3) and Lewis base addition to [(C5Ph5)Cr(mu-X)X](2): Electrochemical, magnetic, and Raman spectroscopic characterization of [(C5Ph5)CrX2](2) and (C5Ph5)CrX2(THF) (X = Cl, Br, I) and X-ray crystal structure

机译:[(C5Ph5)Cr(mu-X)X](2)的(C5Ph5)Cr(CO)(3)和路易斯碱的卤素氧化反应:[(C5Ph5)CrX2]的电化学,磁性和拉曼光谱表征(2)和(C5Ph5)CrX2(THF)(X = Cl,Br,I)和X射线晶体结构

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摘要

The 17-electron complex (C5Ph5)Cr(CO)(3) reacts with halogens (C6H5I . Cl-2, Br-2, and I-2) in C6H6 to yield the dimeric oxidation products [(C5Ph5)Cr(mu -X)X](2) as thermally stable solids. Reactions with other chlorinating agents similarly yield [(C5Ph5)CrCl2](2). An X-ray crystal structure of [(C5Ph5)Cr(mu -Cl)Cl](2) was obtained. The magnetic properties of the Cia-bridged dimer have been determined and modeled using the usual isotropic Hamiltonian H = -2J (S) over cap (1). (S) over cap (2), which yields J/k = -30 K. Low-temperature (77 K) Raman spectra of solid [(C5Ph5)-CrX2](2) (X = Cl, I) allow assignments to be made for the metal-ring and metal halogen stretching modes in the low-frequency region (<600 cm(-1)). Tetrahydrofuran (THF) cleaves these dimers to yield complexes of the form (C5Ph5)CrX2(THF). [References: 51]
机译:17电子配合物(C5Ph5)Cr(CO)(3)与C6H6中的卤素(C6H5I.Cl-2,Br-2和I-2)反应生成二聚体氧化产物[(C5Ph5)Cr(mu- X)X](2)为热稳定固体。与其他氯化剂的反应类似地产生[(C5Ph5)CrCl2](2)。获得了[(C5Ph5)Cr(mu -Cl)Cl](2)的X射线晶体结构。 Cia桥二聚体的磁性已经确定,并在盖帽(1)上使用常见的各向同性哈密顿量H = -2J(S)进行了建模。 (S)在盖帽(2)上,其结果为J / k = -30K。固体[(C5Ph5)-CrX2](2)(X = Cl,I)的低温(77 K)拉曼光谱允许分配给适用于低频区域(<600 cm(-1))中的金属环和金属卤素拉伸模式。四氢呋喃(THF)裂解这些二聚体,生成(C5Ph5)CrX2(THF)形式的络合物。 [参考:51]

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