Effect of second-sphere coordination 13. Consideration of factors affecting adduct formation of ruthenium–ammine complexes with crown ethers based on the stability constants

Adduct formation was systematically investigated for ruthenium–ammine complex and crown ether systems. This study involved crown ether systems with different flexibility, the complex system with different numbers of ammine ligands, and the pentaammine complexes systems with aromatic ligands with different π-electron acceptability. Stability constants of the crown-ether adduct of the complexes were determined for the above systems by 1H NMR spectroscopy. The factors affecting adduct formation were discussed on basis of the stability constant.