cis-Dithiolatonickel as metalloligand to dinitrosyl iron units: the di-metallic structure of Ni(μ-SR)[Fe(NO)2] and an unexpected, abbreviated metalloadamantyl cluster, Ni2(μ-SR)4[Fe(NO)2]3
作者:Chung-Hung Hsieh、Rachel B. Chupik、Scott M. Brothers、Michael B. Hall、Marcetta Y. Darensbourg
DOI:10.1039/c1dt10438a
日期:——
The reaction of Fe(CO)2(NO)2 and Ni(N2S2) (N2S2 = N,Nâ²-Bis(2-mercaptoethyl)-1,4-diazacycloheptane) by a single CO replacement yields [Ni(N2S2)]Fe(NO)2(CO), while an excess of Fe(CO)2(NO)2 leads to triply bridging thiolate sulphurs in a cluster of core composition Ni2S4Fe3, lacking one Fe(NO)2 unit to complete the adamantane-like structure. This structural type was earlier identified in a CuICl aggregate of MII(N2S2) (MII = Ni, Cu), in which complete MII2S4CuI4 core structures were obtained as the major, and, in the case of CuII(N2S2), the incomplete CuII2S4CuI3 as a minor, product. The full Ni2S4Fe4 cluster has not yet been realized for Fe = Fe(NO)2. Computational analysis of the NiFe-heterobimetallic complex addresses structural issues including a â NiâSâFe of 90° in the bimetallic complex.
Fe(CO)2(NO)2和Ni(N2S2)(N2S2 = N,Nâ²-双(2-巯基乙基)-1,4-二氮杂环庚烷)通过单个CO置换反应生成[Ni(N2S2)]Fe(NO)2(CO)、而过量的 Fe(CO)2(NO)2 会导致核心成分为 Ni2S4Fe3 的簇中出现三桥硫代硫酸盐,但缺少一个 Fe(NO)2 单元来完成金刚烷样结构。这种结构类型早先在 MII(N2S2)(MII = Ni、Cu)的 CuICl 聚合物中发现,其中完整的 MII2S4CuI4 核心结构是主要产物,而在 CuII(N2S2)中,不完整的 CuII2S4CuI3 是次要产物。对于 Fe = Fe(NO)2,尚未实现完整的 Ni2S4Fe4 团簇。对 NiFe-heterobimetallic 复合物的计算分析解决了包括双金属复合物中 90° 的 NiâSâFe 在内的结构问题。