Popis: |
The species [Mo{HB(3,5-Me2pz)3}(NO)Cl]2(μ-NHNH) (1) (3,5-Me2pz=3,5-dimethylpyrazol-1-yl) and [Mo{HB(3,5-Me2pz)3}(NO)I]2(μ-NHNH) have been synthesised. Electrochemical reduction of 1 results in a species with a near-infrared spectral band which shows no solvent dependence. Reoxidation results in the formation of another species which undergoes reversible reduction resulting in the development of another near-infrared spectral band which also is insensitive to solvent. These observations suggest that, in both cases, the mixed-valence species are class III. Additionally, 1 has been characterised structurally as a component of a solid solution also containing its chlorinated analogues; this determination shows that all components of the solution contain a near-planar MoNHNHMo array and that Cl replacement is isomorphous. |