期刊
ORGANOMETALLICS
卷 40, 期 15, 页码 2504-2515出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.organomet.1c00269
关键词
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资金
- Foundation for Polish Science [TEAM/2016-3/24]
- US-Polish Fulbright Commission
Electronic communication between Fe centers in diiron complexes with different ligands was investigated, and it was found that [closo-B10H8-1,10-diyl](2-) has the best ability among the closo-boranes to mediate electronic effects similar to those of 1,4-phenylene. This is evident from the observed separation of one-electron-oxidation waves and comparable S-T energy gaps in the doubly oxidized species.
Electronic communication between Fe centers in the diiron complexes [{(eta(5)-Cp)(dppe)Fe}(2){mu(2) -(NC-X-CN)}](n+) (n = 0, 2) in which X = [-B10H8-](2-), - C6H4-, -C8H12- and -C2B10H10- was investigated by spectroscopic (UV-vis and IR), electrochemical (CV and DPV), and single-crystal XRD methods. All experimental results were supported by a DFT computational analysis (B3LYP/Def2SVP) of model complexes that included two other closo-boranes: X = -C2B8H8- and [-B12H10-](2-). The DFT analysis focused on the geometry, electronic excitations, IR spectra, charge and spin delocalization, and intramolecular spin-spin exchange interactions in the series of all six complexes and their singly and doubly oxidized analogues. The results demonstrate that [closo-B10H8-1,10-diyl](2-) has the best ability among the closo-boranes to mediate electronic effects similar to those of 1,4-phenylene. This is evident from the observed separation of one-electron-oxidation waves (similar to 70 mV) and comparable S-T energy gaps in the doubly oxidized species.
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