Accordingly, a partial electron transfer between the metal cation and the corrolic structure occurs, stabilizing the formation of a magnetically coupled corrole 2-• /Cu(II) • radical pair instead of the formal expected Cu(III) cation . Thus, quantum chemical calculations show that antiferromagnetic coupling between copper and corroles, which is predominant over the formal singlet closed-shell spin state, e.g., the Cu(III) case . Despite this, few references involving corroles on non-covalent hybrid GBMs are reported.