B-heterocyclic plumbylenes: A computational study

B-heterocyclic plumbylenes (BHPbs) are compounds in which the nitrogen atoms of an Arduengo cyclic carbene are replaced with electron deficient boron atoms and the divalent carbon atom is replaced with Pb. Here we study the geometrical parameters and stability of these species via their singlet-triplet energy gaps in relation with their HOMO-LUMO energy gap.