Lead-chalcogen double-bond species

This interpretation of the experimental results was corroborated by ab initio calculations on the relative stabilities of a series of double bond compounds, [H2Pb=X] and their plumbylene type isomers, [frans-H-Pb-X-H] and [ciT-H-Pb-X-H] (X = O, S, Se, and Te) (vide supra) 6 The results of the theoretical calculations and experiments for lead-chalcogen double bond species are in sharp contrast to those of the other Group 14 element analogues which do not isomerize to the divalent compounds.14b... 

Depending on the initial connectivity, removal of two electrons from two chalcogen atoms may lead to the formation of a single (A), a double (B) or a triple (C) bond. Surprisingly, there are no experimental examples that correspond to case B although such species are possible intermediates in monoox-... 

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