Abstract
A series of Ru2(DArF)4(N3) compounds have been prepared from the metathesis reaction between Ru2(DArF)4Cl and NaN3, where DArF is diarylformamidinate, and aryl is X–Ph with X as 4-MeO (1), 4-Me (2), H (3), 3-MeO (4), 4-Cl (5), 3-Cl (6), 3-CF3 (7), 4-CF3 (8), 3,4-Cl2 (9) and 3,5-Cl2 (10). Single crystal X-ray diffraction studies of 3 and 10 revealed the expected paddlewheel motif for the first coordination sphere of Ru2 and axial ligation of azide. Voltammetric studies revealed a (quasi)reversible oxidation (A) and a irreversible reduction (B) for all compounds, and a second (quasi)reduction (C) for compounds 6–10. The half-wave potentials of couple A span a remarkable range of 640 mV, and they correlate linearly with the Hammett constant (σ) of the aryl substituent.
Published Version
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