Investigations of the technetium-hydrazido Core. Synthesis and structural characterization of ((n-C sub 4 H sub 9 ) sub 4 N)(Tc sub 2 (NNPh sub 2 ) sub 2 (C sub 6 Cl sub 4 O sub 2 ) sub 4 ) times CH sub 2 Cl sub 2 times 2CH sub 3 OH, a Tc(V)/Tc(VI) Catecholate complex with the hydrazido ligands adopting the unusual. eta. sup 1 bridging mode
- Johnson Matthey, West Chester, PA (United States)
- Syracuse Univ., NY (United States)
Reaction of oxo-bis(tetrachlorocatecholate) Tc(V) complex ((n-C{sub 4}H{sub 9}){sub 4}N)(TcO(C{sub 6}Cl{sub 4}O{sub 2}){sub 2}) (1) with n, N-diphenylhydrazine in Ch{sub 2}Cl{sub 2} yields the binuclear paramagnetic Tc(V)/Tc(VI) mixed-valence complex ((n-C{sub 4}H{sub 9}){sub 4}N)(Tc{sub 2}(NNPh{sub 2}){sub 2}(C{sub 6}Cl{sub 4}O{sub 2}){sub 4}){times}CH{sub 2}Cl{sub 2}{times}2CH{sub 3}OH (2). The structure of the molecular anion of 2 consists of two distorted octahedral Tc centers bridged by two hydrazido (2{minus}) groups bonding s in the {eta}{sup 1} mode, an unusual bonding motif for this ligand, having previously described only for cyclopentadienyl-metal species. Complex 2 is also a unique example of a Tc(V)/Tc(VI) mixed-valence species; the Tc-Tc distance of 2.612 (2) {angstrom} is consistent with direct metal-metal interaction. Crystal data for 1 and 2. 46 refs., 2 figs., 5 tabs.
- OSTI ID:
- 5942182
- Journal Information:
- Inorganic Chemistry; (United States), Vol. 30:9; ISSN 0020-1669
- Country of Publication:
- United States
- Language:
- English
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400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials