The theoretical knowledge about the zinc‐zinc bond has been recently expanded after the proposal of a zinc‐zinc double bond in several [Zn2(L)4] compounds (Angew. Chem. Int. Ed. 2017, 56, 10151‐10155). Prompted by these results, we have selected the [Zn2(CO)4] species, isolobally related to ethylene, and theoretically investigated the possible η2‐Zn2‐coordination to several first‐row transition metal fragments. The [Zn2(CO)4] coordination to the metal fragment produces an elongation of the dizinc bond and a concomitant pyramidalization of the [Zn(CO)2] unit. These structural parameters are indicative of π‐backdonation from the metal to the coordinated dizinc moiety, as occurred with ethylene ligand. A quantum theory of atoms in molecules study of the ZnZn bond shows a decrease of ρBCP, ∇2ρBCP ∫Zn∩Znρ and delocalization indexes δ(Zn,Zn), relative to corresponding values in the parent [Zn2(CO)4] molecule. The ZnZn and MZn bonds in these [(η2‐Zn2(CO)4)M(L)n] complexes can be described as shared interactions with an important covalent component where the ZnZn bond is preserved, albeit weakened, upon coordination.