structures of both derivatives exhibit infinite chains caused by a weak intermolecular contact between the chalcogen and one nitrogen atom with a T-shaped (ψ-pentagonal-bipyramidal) ligand arrangement. Crystallization of both reagents from dimethylsulfoxide gave single crystals of the corresponding 1:1adducts that crystallize in infinite chains best expressed by the formula [E(C5F4N)2·(μ-DMSO)]∞ (E =
通过AgC 5 F 4 N和相应元素的氧化还原金属转移,以高收率制备了Se(C 5 F 4 N)2和Te(C 5 F 4 N)2。两种衍生物的晶体结构均显示出无限的链,这是由于硫族元素与一个氮原子之间呈T形(ψ-五边形-双锥体)配体排列而引起的分子间的弱接触而引起的。从二甲基亚砜两种试剂的结晶,得到相应的1-单晶:1加合物,在无限链结晶最好由式[E(C表示5 ˚F 4 N)2 ·(μ-DMSO)] ∞(E = Se,Te)。在这些情况下,硒和碲的配位范围为正方形(ψ-八面体)。在[Te(C 5 F 4 N)2 ·TMTU] ∞和[Te(C 6 F 5)2 ·TMTU] ∞(TMTU =四甲基硫脲)的分子结构中发现相似的作用。Te–S原子间距离的差异清楚地表明,与C 6 F 5基团相比,C 5 F 4 N配体的吸电子量要大得多。也就是说,Te(C 5 F 4 N)2是更强的路易斯酸。