Unstable intermediates. Part 169. Electron-gain and -loss centres in irradiated potassium dicyanoargentate(I)
作者:Martyn C. R. Symons、Donald N. Zimmerman
DOI:10.1039/dt9760001970
日期:——
identified as an electron-gain centre, [Ag(CN)2]2–, with the extra electron in a σ* orbital with 4dz2+ 5s character on silver and considerable density on the ligands. Species B, having gx 2.091, gy 2.051, gz 2.008. Ax(109Ag) 42 G, Ay 34 G, and Az⩽ 65 G, is thought to be the electron-loss centre, Ag[CN]2 with the hole largely localised in silver (again, 4dz2± 5s); on annealing above 77 K, centre B, acquired
的K曝光将[Ag(CN)2 ],以60个钴γ射线在77K给出了两个顺磁物质,A和B.物种A,具有克∥ 2.001,克⊥ 2.006。甲∥(109 Ag)的60 G,和甲⊥(109 Ag)的30 G,被识别为电子增益中心,将[Ag(CN)2 ] 2-中轨道与4σ*,与额外的电子d在银上具有z 2 + 5 s特性,在配体上具有相当的密度。具有g x 2.091,g y的物种B2.051,克ž 2.008。甲X(109 Ag)的42 G,甲ÿ 34 G,和甲ž ⩽65 G,被认为是电子损失中心,银[CN] 2与银(再次,4很大程度上局部空穴d ž 2 ±5 s); 上退火高于77 K,中心B,获得性轴对称(克⊥ 2.078,阿⊥ 29 G)。甲醇溶液在77 K时给出的中心定义不清,类似于A。退火时,新物种具有A iso。(109 Ag)155 G和A(14 N)(一个)17.3 G( g av)。获得2