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• W2000218124 endingPage "3085" @default.
• W2000218124 startingPage "3075" @default.
• W2000218124 abstract "Reaction between the Os(VI) nitrido (OsVI identical to N+) complexes [OsVI(L3)(Cl)2(N)]+ (L3 is 2,2':6',2-terpyridine (tpy) or tris(1-pyrazolyl)methane (tpm)) and secondary amines (HN(CH2)4O = morpholine, HN(CH2)4CH2 = piperidine, and HN(C2H5)2 = diethylamine) gives Os(V)-hydrazido complexes, [OsV(L3)(Cl)2(NNR2)]+ (NR2 = morpholide, piperidide, or diethylamide). They can be chemically or electrochemically oxidized to Os(VI) or reduced to Os(IV) and Os(III). The Os-N bond lengths and Os-N-N angles in the structures of these complexes are used to rationalize the bonding between the dianionic hydrazido ligand and Os. The rate law for formation of the Os(V) hydrazido complexes with morpholine as the base is first order in [OsVI(L3)(Cl)2(N)]+ and second order in HN(CH2)4O with ktpy(25 degrees C, CH3CN) = (581 +/- 12) M-2 s-1 and ktpm(25 degrees C, CH3CN) = 2683 +/- 40 M-2 s-1. The proposed mechanism involves initial nucleophilic attack of the secondary amine on the Os(VI) nitrido group to give a protonated Os(IV)-hydrazido intermediate. It is subsequently deprotonated and then oxidized by OsVI identical to N+ to Os(V). The extensive redox chemistry for these complexes can be explained by invoking a generalized bonding model. It can also be used to assign absorption bands that appear in the electronic from the visible-near-infrared spectra including a series of d pi-->d pi interconfigurational bands at low energy." @default.
• W2000218124 created "2016-06-24" @default.
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• W2000218124 date "2000-06-13" @default.
• W2000218124 modified "2023-09-26" @default.
• W2000218124 title "Mechanism and Molecular−Electronic Structure Correlations in a Novel Series of Osmium(V) Hydrazido Complexes" @default.
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• W2000218124 doi "https://doi.org/10.1021/ic000058e" @default.
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