One and Multiple Bonds Interatomic Spin-Spin Coupling in η⁶-Cymene Ru(II) of 3,5-Dimethyl-, 3,5-Dicarboxylic-, and 5-Phenyl-pyrazole Derivatives

Figure 1

The molecular representation of η⁶-cymene (Cym) ruthenium(II) derivatives of 3,5-dimethylpyrazole (1a), 3,5-diaceticpyrazole (2a), bis(3,5-dimethylpyrazol-1-yl)methane (3a), bis(3,5-dimethylpyrazol-1-yl)acetic (4a), bis(5-phenylpyrazol-1-yl)acetic (5a), and bis(3,5-dimethylpyrazol-1-yl)pyridine (6) complexes with their hydrated forms. The explicit hydrogen atoms shown are of interest.