Imidazol-2-ylidene-silver chloride

A whole series of (imidazol-2-ylidene)gold(i) complexes with the 1 1 stoichiometry has been prepared from the readily available silver chloride adducts, which upon reaction with (Me2S)AuCl, followed by chloride metathesis, give the complexes shown in Scheme 60. 

Ramnial T, Abemethy CD, Spicer MD et al. (2003) A monomeric imidazol-2-ylidene-Silver(l) chloride complex synthesis, structure, and sohd state Ag and C CP/MAS NMR characterization. Inorg Chem 42 1391-1393... 

Gold(I) chloride - l -bis(2,6-diisopropylphenyl)imidazol-2-ylidene/silver salts... 

Silveii Ag)iI = l/2, /2). Ag(I) complexes of selenones, [LAgN03] and [AgL2]N03 (L = imidazolidine-2-selenone or diazinane-2-selenone and their derivatives.) were prepared and characterized by elemental analyses, IR and NMR ( H, and Ag) spectroscopy. The structure of l,3-bis(2,4,6-trimethylphenyl)-imidazol-2-ylidene-silver(I) chloride, 1, were determined to be a monomer with weak head-to-tail H C1 interactions in the solid state by Ag NMR study using a C(carbene) labeled derivative, l( C). ... 

Carbene complexes have also been prepared by transmetallation reactions. Lithiated azoles react with gold chloride compounds and after protonation or alkylation the corresponding dihydro-azol-ylidene compounds, e.g., (381) or (382), are obtained.22 9-2264 Silver salts of benz-imidazol have also been used to obtain carbene derivatives.2265 Mononuclear gold(I) carbene complexes also form when trimeric gold(I) imidazolyl reacts with ethyl chlorocarbonate or ethyl idodate.2266,2267 The treatment of gold halide complexes with 2-lithiated pyridine followed by protonation or alkylation also yields carbene complexes such as (383).2268 Some of these carbene complexes show luminescent properties.2269-2271... 

---