Table 3. Redox potentials of the metal complexes, excitation energies, and thermodynamic data for the intramolecular electron transfer process from the excited Ru unit to the Re unit and the ETCR process.

Complex	E 0/V vs. Ag/AgNO3				E 00(3Ru*) b /eV	–ΔG0CS/eV	–ΔG0CR/eV
	Ru(3+/2+) a	Ru(3+/2+*)	Ru(2+/+) a	Re(+/0) a
RuRe(OEt)	0.81	–1.14			1.95	–0.69	2.65
RuRe(Ph)	0.81	–1.14			1.95	–0.68	2.64
RuRe(FPh)	0.83	–1.12			1.95	–0.61	2.56
Ru	0.82		–1.74
Re(OEt)				–1.78
Re(Ph)				–1.77
Re(FPh)				–1.67

^aFrom ref. 10; measured in an CH₃CN solution containing the complex (0.6 mM) and Et₄NBF₄ (0.1 M).

^bExcitation energy of the lowest ³MLCT excited state of the Ru unit (Fig. S10).