Conclusion
Quantum chemical calculations predict that attachment of one electron to 1,2-diBeX-benzene and 1,2-diZnX-benzene derivatives leads to the formation of a strong 2-center-1-electron bond encompassing the two metal centres. Topological features of electron density within the realm of quantum theory of atoms in molecules and electron localization function also supports the formation of these bonds. One important aspect of these radical anions is their stability towards electron detachment. The calculated adiabatic detachment energies of these radical anions are significantly negative suggesting their stability. Moreover, the calculated bond dissociation energy values are also significant.