To shed light on the above controversy regarding the possibility that MMBs could be either ERMBs or EDMBs, we have calculated the ES and ET values of some bonds present in different molecules and solids with known ERMBs and EDMBs (see Fig. and Table in ESI). The ES vs. ET values of the ERMBs and EDMBs of those molecules and solids are represented in Fig. . It can be observed that molecules with ERMBs, such as I3 ꟷ and XeF2, as well as solids with molecular solids in which there are ERMBs, such as linear I3 ꟷ molecules in solid CsI3 and cubic TeI6 2ꟷ molecules in solid Cs2TeI6, exhibit larger values of ES and also of ET than MMBs. ERMBs are located in a yellow region above the red region of covalent bonds and much above that the green region of MMBs (see Fig. ). This result agrees with Wuttig's calculations . On the other hand, a molecule with EDMBs, such as B2H6, features an ES value somewhat smaller than those of MMBs in pnictogens and chalcogens and much smaller than ERMBs, but similar to ES values in lead halide perovskites with MMBs, such as CsPbI3 Therefore, according to ES values it seems that MMBs are in the same green region of Fig. that EDMBs.