Synthesis, crystal structure and electronic properties of [3.3]metaparacyclophane-bridged bimetallic ruthenium alkynyl complexes

Abstract A series of [3,3]metaparacyclophanes bridged bimetallic ruthenium complexes have been designed, synthesized and characterized. 1 H NMR and X-ray crystal structure studies revealed that there are prominent intramolecular edge-to-face interaction in these diruthenium complexes, both in the solution and solid states. Electrochemical analyses indicated that the electron-withdrawing substituent groups (–CN, –NO 2 ) can enhance the thermodynamic stability of corresponding mixed-valence species.