The reaction of (MeNC)-, (PhNC)- and (MesNC)AuCl in tetrahydrofuran with an equimolar amount of the corresponding isonitrile ligand and one equivalent of Ag+X- (X-= BF- 4 or CF3SO- 3) leads to the formation of the bis(isonitrile)gold(I) complexes (MeNC)2Au+ CF3SO- 3(1), (PhNC)2Au+ BF- 4 (2) and (MesNC)2Au+ BF- 4(3). The crystal structures of 1, 2 and 3 have been determined. In compound 1 there are rod-like cations with a parallel packing into meandering puckered layers, in which the gold atoms have alternating Au-Au contacts of 3.611 and 3.624 Å. In complex 2 the cations form long double-paddles, with the two paddles at an angle of 77.5°. The individual cations are well separated and have no sub-van-der-Waals Au-Au contacts. The crystal structure of 3 is similar, but with a smaller dihedral angle between the planes of the two mesityl rings (56.0°)
A series of (isonitrile)gold(I) complexes has been synthesized: (MeNC)AuX (X = Cl la, I lc), (t-BuNC)AuBr 2b. (PhNC)AuX (X = Cl 3a. Br 3b. I 3c. SCN 3d), (MesNC)AuCl 4a [mes=mesityl], and (MeOC(O)CH2NC)AuX (X = Cl 5a. Br 5b. I 5c. SCN 5d). The chlorides were prepared by the reaction of (Me2S)AuCl with equimolar amounts (or with an excess) of the corresponding isonitrile. The bromides, iodides and thiocyanates were obtained from the reaction of (RNC)AuCl with K+X- (X = Br, I, SCN) in the two-phase system H2O/CH2CI2. The molecular and crystal structures of la. 2b. 3a-c, 4a, and 5a-c have been determined by X-ray diffraction methods. In the solid state the molecules are aggregated through short Au-Au contacts into dimers (4a and 5c), chains (la, 2b and 3a-c) or sheets (5a and 5b). The influence of the isonitrile and halide ligands on the type and strength of the intermolecular Au-A u contacts is discussed
合成了一系列(异腈)金(I)配合物:(MeNC)AuX(X = Cl la,I lc),(t-BuNC)AuBr 2b,(PhNC)AuX(X = Cl 3a,Br 3b,I 3c,SCN 3d),(MesNC)AuCl 4a [mes = 甲基丙烯酸甲酯基] 和(MeOC(O)CH2NC)AuX(X = Cl 5a,Br 5b,I 5c,SCN 5d)。氯化物是通过(Me2S)AuCl与相应的异腈的等摩尔量(或过量)反应制备的。溴化物、碘化物和硫氰酸盐是从(RNC)AuCl与K+X-(X = Br,I,SCN)在两相系统H2O / CH2CI2中反应得到的。la,2b,3a-c,4a和5a-c的分子和晶体结构已通过X射线衍射法确定。在固态中,分子通过短的Au-Au接触聚集成二聚体(4a和5c),链(la,2b和3a-c)或片(5a和5b)。讨论了异腈和卤化物配体对分子间Au-Au接触类型和强度的影响。