page_title: Plumbylene
section_title: Transmetallation
hierarchical_section_title: Plumbylene / Reactivity / Transmetallation
caption_attribution_description: English: Transmetallation between a plumbylene and various organometallic reagents (top) and the formation of an unusual oligomeric chain compound
context_page_description: Plumbylenes are divalent organolead(II) analogues of carbenes, with the general chemical formula, R₂Pb, where R denotes a substituent. Plumbylenes possess 6 electrons in their valence shell, and are considered open shell species.
  The first plumbylene reported was the dialkylplumbylene, [(Me₃Si)₂CH]₂Pb, which was synthesized by Michael F. Lappert et al in 1973.
  Plumbylenes may be further classified into carbon-substituted plumbylenes, plumbylenes stabilized by a group 15 or 16 element, and monohalogenated plumbylenes.
context_section_description: Plumbylenes are known to undergo nucleophilic substitution with organometallic reagents to form transmetallated products.²⁸ In an unusual example, the use of TlPF₆, bearing the weakly coordinating anion PF₆⁻, led to the formation of crystals of an oligonuclear lead compound with a chain structure upon work-up, highlighting the interesting reactivity of plumbylenes.²⁸
  In addition, plumbylenes can also undergo metathesis with group 13 E(CH₃)₃ (E = Al, Ga) compounds.
  Plumbylenes bearing different substituents can also undergo transmetallation and exchange substituents, with the driving force being the relief of steric strain and the low Pb-C bond dissociation energy.
caption: Transmetallation between a plumbylene and various organometallic reagents (top) and the formation of an unusual oligomeric chain compound (bottom)
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