A Lead(II) Substituted Triplet Carbene.

Reaction of the pincer-type ligand L supported complex [LPbBr][BArF] () with Li[(C(═N)TMS)] furnishes [LPb(C(═N)TMS)][BArF] (). Diazo-compound eliminates dinitrogen upon irradiation affording formal plumba-alkyne , which persists in cold fluoroarene solutions. Variable temperature UV/Vis and NMR spectroscopies in combination with quantum-chemical calculations identify as a metal-substituted triplet carbene.

New Insight into the Reactivity of S,S-Bis-ylide.

The present work focuses on the reactivity of S,S-bis-ylide , which presents a strong nucleophilic character, as evidenced by reactions with methyl iodide and CO, affording C-methylated salts and betaine , respectively. The derivatization of betaine affords the corresponding ester derivative , which is fully characterized by using NMR spectroscopy and X-ray diffraction analysis. Furthermore, an original reaction with phosphenium ions leads to the formation of a transient push-pull phosphino(sulfonio)carbene , which rearranges to give stabilized sulfonium ylide derivative .

Complexes of Dichlorogermylene with Phosphine/Sulfoxide-Supported Carbone as Ligand.

Due to their remarkable electronic features, recent years have witnessed the emergence of carbones LC, which consist in two donating L ligands coordinating a central carbon atom bearing two lone pairs. In this context, the phosphine/sulfoxide-supported carbone exhibits a strong nucleophilic character, and here, we describe its ability to coordinate dichlorogermylene. Two original stable coordination complexes were obtained and fully characterized in solution and in the solid state by NMR spectroscopy and X-ray diffraction analysis, respectively.