New homoleptic carbene transfer ligands and related coinage metal complexes

Tris(carbene)borate Ligands Featuring Imidazole-2-ylidene, Benzimidazol-2-ylidene, and 1,3,4-Triazol-2-ylidene Donors. Evaluation of Donor Properties in Four-Coordinate {NiNO}10 Complexes

“…33 We note that a bis(1,3,4-triazole)hydroborane cation has been previously reported, although a different synthetic route was used. 34 The resulting tris(triazolium)hydroborane dications 12 and 13 were characterized by 1 H NMR spectroscopy, ESI-MS and microanalysis. The triazolium salts are colorless air-stable compounds that are less soluble in non-polar solvents than the related tris(imidazolium)hydroborane dications.…”

Ag(I)-N-heterocyclic carbene complexes of N-allyl substituted imidazol-2-ylidenes with ortho-, meta- and para-xylyl spacers: Synthesis, crystal structures and in vitro anticancer studies

“…A large number of Ag(I)-NHC complexes have been synthesized, characterized, and their potential uses as antimicrobial, anticancer and carbene transfer agents have also been studied [2,3]. Three general procedures for the preparation of Ag(I)-NHC complexes have been established.…”

Synthesis and structures of π-allylpalladium(II) complexes containing bis(1,2,4-triazol-5-ylidene-1-yl)borate ligands. An unusual tetrahedral palladium complex

“…The first step involves deprotonation of the imidazolium salts with Ag 2 O to form the Ag-NHC species. Although these complexes could be isolated [51], we used the Ag-NHC complexes in situ. The [H 2 B(RTz) 2 Pd(p-allyl)] complexes 2a-2d were prepared by the reactions of the Ag-NHC complexes with [Pd(pallyl)Cl] 2 at room temperature in good yields (Scheme 1).…”

“…The studies on bis(1,2,4-triazol-5-ylidene-1-yl)borate are relatively limited. Santini et al reported the synthesis of dinuclear silver(I) and gold(I) complexes with bis(1,2,4-triazol-5-ylidene-1-yl)borate [51]. No palladium complex with bis(1,2,4-triazol-5-ylidene-1-yl)borate has been reported.…”