Catalano Vincent J, Malwitz Mark A
Department of Chemistry, University of Nevada, Reno, Nevada 89557, USA.
Inorg Chem. 2003 Sep 8;42(18):5483-5. doi: 10.1021/ic034483u.
Reaction of 1,3-bis(2-pyridinylmethyl)-1H-imidazolium salt, [H(pyCH(2))(2)im]X (X = BF(4)(-) or Cl(-)), with silver oxide in acetonitrile readily yields yellow-brown [((pyCH(2))(2)im)(2)Ag]X, 1.BF(4) or 1.Cl. The chloride salt crystallizes with 3.650 A intermolecular Ag...Ag interactions while 1.BF(4) shows no short intermolecular interaction. Addition of excess Ag(BF(4)) produces the homoleptic carbene bridged trimetallic species, (mu-NHC)(3)Ag(3)(3), 2. This species contains very short Ag-Ag separations between 2.7249(10) and 2.7718(9) A. In solution, these complexes are photoluminescent.
1,3 - 双（2 - 吡啶基甲基）-1H - 咪唑鎓盐[H(pyCH₂)₂im]X（X = BF₄⁻ 或 Cl⁻）与氧化银在乙腈中反应，很容易生成黄棕色的[((pyCH₂)₂im)₂Ag]X，即1.BF₄ 或 1.Cl。氯化物盐结晶时存在3.650 Å 的分子间 Ag...Ag 相互作用，而1.BF₄ 则没有短程分子间相互作用。加入过量的Ag(BF₄)会生成同配体卡宾桥连的三金属物种(μ - NHC)₃Ag₃₃，即2。该物种中Ag - Ag间距非常短，在2.7249(10) Å 至2.7718(9) Å 之间。在溶液中，这些配合物具有光致发光性。
