Symmetry-adapted perturbation theory interaction energy decomposition for H2CY-XF (YÂ =Â O, S, Se; XÂ =Â H, Li, Cl) complex

► The hydrogen, lithium, and halogen bonds in H2CY-XF complexes have been compared. ► The hydrogen- and halogen-bonded complexes are linear. ► The lithium-bonded complex is cyclic. ► The nature of interactions has been unveiled by SAPT method.