
Keywords: انتزاع H; Valence-bond theory; Valence bond state-correlation diagrams; VBSCD; VBCMD; Bonding models; Charge-shift bonding; Bonding in metal clusters; Quadruple bonding; VB modeling of chemical reactivity; SN2; H-abstraction; PCET; Diels-Alder; P450 hydroxylation;