Novel Ag(I), Pd(II), Ni(II) complexes of N,N′-bis-(2,2-diethoxyethyl)imidazole-2-ylidene: Synthesis, structures, and their catalytic activity towards Heck reaction

Another silver complex of 1,3-dibenzylimidazol-2-ylidene: Solution and solid-state structures

“…The observation that different crystallization conditions may lead to different crystal structures of Ag(I)-NHC complexes has been noted before [14]. In addition, very recently another example of a type C solid-state structure was reported, obtained from a tetra-ether substituted imidazolium bromide [24]. In that case, however, the parent silver complex analyzed as a 1:1 complex and AgBr is reported to be formed at the bottom of the crystallization tube upon crystallization by slow evaporation of a dichloromethane solution.…”

Coinage Metal Complexes of the Carbenic Tautomer of a Conjugated Mesomeric Betaine Akin to Nitron

“…For complexes formed from imidazole-based NHCs with AgBr which exhibit a stoichiometric ratio of 2:1 of both components two principal structure types are known, viz. dicoordinate [Ag(NHC) 2 ]Br [ 106 ] and tricoordinate [Ag(NHC) 2 Br] [ 107 , 108 , 109 ]. The dicoordinate structure type is routinely observed with less nucleophilic anions such as, for example, nitrate, perchlorate, triflate, tetrafluoroborate or hexafluorophosphate [ 1 ].…”

Coinage Metal Complexes of Bis‐Alkynyl‐Functionalized N‐Heterocyclic Carbenes: Reactivity, Photophysical Properties, and Quantum Chemical Investigations

“…[1][2][3][4][5][6][7][8][9][10] Nowadays, NHCs are considered to be maturel igands and are widely used in transition metal and main group chemistry. [13][14][15][16] In this way,f urtherd onor sites such as phosphines, [17][18][19][20][21] alcohols, [22][23][24][25] thiols, [26,27] and other functional groups [28][29][30] can be combined with NHC chemistry and allow ab road variety of applicationsf or functionalized NHC complexes. [13][14][15][16] In this way,f urtherd onor sites such as phosphines, [17][18][19][20][21] alcohols, [22][23][24][25] thiols, [26,27] and other functional groups [28][29][30] can be combined with NHC chemistry and allow ab road variety of applicationsf or functionalized NHC complexes.…”

“…[11,12] Besides their different steric ande lectronic properties compared to, for example, phosphines, NHCs are easily functionalized, as almosta ny organic substituent can be attached to the nitrogen atoms. [13][14][15][16] In this way,f urtherd onor sites such as phosphines, [17][18][19][20][21] alcohols, [22][23][24][25] thiols, [26,27] and other functional groups [28][29][30] can be combined with NHC chemistry and allow ab road variety of applicationsf or functionalized NHC complexes. Besides their applicationi nc atalysis, coinage metal compounds have also been extensively investigatedw ith respect to their photoluminescence properties.…”