The regiochemistry of [3+2] cycloaddition (32CA) processes between benzonitrile N-oxide 1 and β-phosphorylated analogues nitroethenes 2a–c has been studied using the Density Functional Theory (DFT) at M062X/6-31+G(d) theory level. obtained results reactivity indices show that can be classified both as a moderate electrophile nucleophile, while strong electrophiles marginal nucleophiles. Moreove...