Aggregation of Complexes Coordinated with<i>N</i>,<i>N</i>′-Bis(5-alkylsalicylidene)ethylenediamine:<sup>1</sup>H NMR Peak Shifts and Paramagnetic Broadening Investigations
作者:Kazuo Miyamura、Keiki Satoh、Yohichi Gohshi
DOI:10.1246/bcsj.62.45
日期:1989.1
Nickel(II) complexes coordinated with N,N′-disalicylideneethylenediamine (salen) substituted by a series of n-alkyl side chains have been synthesized. Drastic improvement in the solubility towards chloroform brought about by the increase in alkyl side chain lengths realised an extremely high concentration of 0.5 mol·dm−3. Due to aggregation, their 1H NMR spectra in CDCl3 were strongly dependent on
已经合成了与被一系列正烷基侧链取代的 N,N'-二水杨基乙二胺 (salen) 配位的镍 (II) 配合物。由于烷基侧链长度的增加,对氯仿的溶解度显着提高,实现了 0.5 mol·dm-3 的极高浓度。由于聚集,它们在CDCl3 中的1H NMR 谱强烈依赖于浓度,尤其是在高浓度区域。烷基链长度对依赖性的影响很小,表明聚集是由复杂-复杂相互作用引起的,而不是由烷基侧链之间的疏水相互作用引起的。假设单体-二聚体平衡,聚集常数由浓度依赖性确定。更多,通过结合浓度依赖性的结果和添加相应的铜 (II) 配合物引起的顺磁展宽来估计聚集体的结构。顺磁展宽...