The equilibrium geometries and bond dissociation energies of the 14 valence electron (VE) complexes [(PMe3)(2)M-BeCl2], [(PMe3)(2)M-BeClMe], and [(PMe3)(2)M-BeMe2] with M = Nt, Pd, and Pt have been calculated using density functional theory at the BP86/TZ2P level. The nature of the M Be bond was analyzed with the NBO charge decomposition analysis and the EDA energy decomposition analysis. The theoretical results predict the equilibrium structures with a T-shaped geometry at the transition metal where the PMe3 ligands are in the axial positions The calculated bond dissociation energies show that the M E bond strengths are in the range of donor acceptor complexes of divalent beryllium compounds with ammonia. The bond strength decreases when the substituent at beryllium changes from Cl to CH3. The NBO analysis shows a negative charge at the BeX2 fragment, which indicates a net charge flow from the transition metal fragment to the beryllium fragment The energy decomposition analysis of the M-Be bonds suggests two donor acceptor bonds with sigma mid pi symmetry where the transition metal fragment is a double donor with respect to the beryllium ligand The pi component of the [Ni]-> BeXX' donation is much smaller than the sigma component