Synthesis of Well-Defined N-Heterocyclic Carbene Silver(I) Complexes

Abstract

A series of N-heterocyclic carbene (NHC)AgCl complexes [NHC = SIMes (1), IPr (2), SIPr (3), IPrMe (4), IMe (5), ICy (6), IAd (7), IsB (8), IDD (9), and TPh (10)] have been synthesized through reaction of the imidazolium chloride salts with Ag2O or by direct metalation of the corresponding imidazol-2-ylidene carbene in the presence of AgCl. All silver(I) complexes [(SIMes)AgCl] (11), [(IPr)AgCl] (12), [(SIPr)AgCl] (13), [(IPrMe)AgCl] (14), [(IMe)AgCl] (15), [(ICy)AgCl] (16), [(IAd)AgCl] (17), [(IsB)AgCl] (18), [(IDD)AgCl] (19), and [(TPh)AgCl] (20) have been spectroscopically and structurally characterized. The structure of these silver complexes is dependent on the halide and the solvent used for the synthesis. Adjusting these parameters has led to the previously reported complex, [(IMes)2Ag]+[AgCl2]- (21), and to a new silver complex, [(IMes)2Ag]+ 2[Ag4I6]2- (22).

Synthesis and coordination compounds of a bis(imino)acenaphthene (BIAN)-supported N-heterocyclic carbene

“…The C-Ag and Ag-Cl bond distances and the C-Ag-Cl bond angles (averaged over the crystallographically independent molecules) of 2.067(3) Å , 2.314(1) Å and 175.84(9) • , respectively, are very similar to those reported for the non-annulated complex (IPr)AgCl, namely 2.056(6) Å , 2.316(17) Å and 175.2(2) • , respectively. 10 The coordination of IPr(BIAN) 2 to AgCl prompts some significant changes in the metrical parameters of the NHC ring. Thus, the C-C distance of 1.357(4) Å (averaged over the two crystallographically independent molecules) is somewhat shorter than that for the unligated IPr(BIAN) carbene (1.373 (5) The metrical parameters for the NHC ring of the IPr(BIAN)-AuCl complex (5) (Fig.…”

Benzimidazole‐based silver(I)–N‐heterocyclic carbene complexes as anti‐bacterials: synthesis, crystal structures and nucleic acids interaction studies

“…The distances between the metal centre and carbene carbon are in the range 2.079(4)-2.092(4) Å, which are close to the mean values found in comparable bis-benzimidazole complexes of Ag(I). [47][48][49] Both Ag(I) ions are in a two-coordinate distorted linear environment with angles 173.22(16)°for C1-Ag1-C24 and 171.89(19)°for C14-Ag2-C37. The internal ring angles of benzimidazole rings at the carbene centre are in the range 104.49(4)-106.25(4)°, which are in good agreement with those of reported complexes having a similar ligand architecture.…”

Synthesis, Characterization and Luminescence of Silver(I) and Gold(I) Complexes Bearing a Diethyl Acetal Functionalized N-Heterocyclic Carbene

“…Both Ag-C bond lengths are almost identical [Ag1-C1 2.08(1)Å, Ag1-C11 2.09(1)Å] and fall in the range typical for other silver-carbene complexes [16].…”