An ionicity diagram for the family of [{Ru2(CF3CO2)4}2(TCNQRx)] (TCNQRx = R-substituted 7,7,8,8-tetracyano-p-quinodimethane)

Abstract

A diagram of energies between the HOMO of donor (D) and LUMO of acceptor (A) vs. ΔE_1/2(DA) (= E_1/2(D) − E_1/2(A): E_1/2 = first-redox potential) clearly demonstrates the ionicity in the series of D/A assemblies, [{Ru₂(CF₃CO₂)₄}₂(TCNQR_x)]·n(solv) (TCNQR_x = 2,5- or 2,3,5,6-R-substituted 7,7,8,8-tetracyano-p-quinodimethane; R_x = H₄, F₂, Cl₂, Br₂, F₄, Me₂, (OMe)₂).