In this and the following examples, we will employ sobEDA to study chemical bonds. To illustrate the relevant capacity of sobEDA, we performed the analysis for the coordination bond between CH2 and (CO)5Cr fragments in transition metal complex (CO)5CrCH2. The entire system and the fragments are set to be in neutral singlet state during the calculations. It should be noted that the actual ground state of CH2 carbene is triplet, if one hopes to take triplet as reference state of the fragment, one may manually calculate its single-triplet energy gap as preparation energy of the electronic structure, which could then be treated as an individual term of the energy decomposition.