The leptonic widths of high ψ-resonances are calculated in a coupled-channel model with unitary inelasticity, where analytical expressions for the mixing angles between (n + 1) 3 S1 and n 3 D1 states and probabilities Zi of the cc component are derived. These factors depend on energy (mass) and can be different for ψ(4040) and ψ(4160). However, our calculations give a small difference between the mixing angles, θ(ψ(4040)) = (28 +1 −2 ) • and θ(ψ(4160)) = (29 +2 −3 ) • , and ∼ 10% difference between the probabilities Z1 (ψ(4040)) = 0.85 +0.05 −0.02 and Z2 (ψ(4160)) = 0.79 ± 0.01. It provides the leptonic widths Γee(ψ(4040)) = (1.0 ± 0.1) keV, Γee(ψ(4160)) = (0.62 ± 0.0.07) keV in agreement with experiment; for ψ(4415) Γee(ψ(4415)) = (0.66±0.06) keV is obtained, while for the missing resonance ψ(4510) we predict its mass, M (ψ(4500)) = (4512 ± 2) MeV, and Γee(ψ(4510)) = (0.68 ± 0.14) keV.