Abstract
The redox-active doubly bridged species [{Mo(NO)(Tp Me2)Q} 2] [Tp Me2 = tris(3,5-dimethylpyrazol-1-yl)hydroborate, Q = O(CH 2) n O, n = 3, 5, or OCH 2(CF 2) n− 2CH 2O, n = 5, 6], and a chelate complex [Mo(NO)-(Tp Me2)O(CH 2) 5O] were prepared and characterised by elemental and mass analyses, 1H NMR and IR spectroscopy. The bimetallic species with C 3, C 5, and C 5(F) bridges exhibit two well-resolved reduction processes in their cyclic voltammograms (Δ E 1/2 values of 290, 170, and 170 mV, respectively). These results indicate that the presence of the second bridge increases the extent of electrochemical interactions (by ca. 90–130 mV) in comparison with their singly bridged analogues. All non-fluorinated and the chelate species were catalytically active in cathodic reduction of chloroform.
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