Solvatochromism and Structure of Acetylacetonatocopper(II) Complexes with<i>N</i>,<i>N</i>′-Dipropyl-,<i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-Tetrapropyl-, and<i>N</i>,<i>N</i>- and<i>N</i>,<i>N</i>′-Diisopropylethylenediamines
作者:Hiroshi Miyamae、Hideyuki Kudo、Goro Hihara、Kozo Sone
DOI:10.1246/bcsj.71.2621
日期:1998.11
Seven copper(II) complexes of the general formula [Cu(acac)(diam)]X were prepared, where acac and diam stand for acetylacetonate and one of the diamines in the title, and X− for a bulky univalent anion, respectively. Their solvatochromism was compared with that of the corresponding complexes with N,N,N′,N′-tetramethylethylenediamine and related diamines, to see the effect of their bulky N-alkyl groups. X-ray crystal analyses showed that the perchlorates of N,N′- and N,N-diisopropyl complexes are apparently 6- and 5-coordinated, respectively, in their crystals, although their ClO4− ions are held extremely weakly and are easily driven out by solvent molecules in solution, leading to their solvatochromism. The Cu–N and Cu–O(acac) bond distances in the former, 199.5(4)/202.4(5) and 190.6(4)/190.1(4) pm, respectively, are similar to each other, while the Cu–N(isopropyl)2 distance, 206.4(9) pm, in the latter is notably longer than the Cu–NH2 distance, 196(1) pm.
制备了七种通式为[Cu(acac)(diam)]X的铜(II)配合物,其中acac和diam分别代表乙酰丙酮阴离子和标题中的一种二胺,X−则为一种笨重的单价阴离子。它们的溶剂染色性与相应的N,N,N′,N′-四甲基乙烯二胺及相关二胺的配合物进行了比较,以观察它们的笨重N-烷基基团的影响。X射线晶体分析显示,N,N′-和N,N-二异丙基复合物的高氯酸盐在其晶体中分别表现为6配位和5配位,尽管它们的ClO4−离子与晶体的结合极其微弱,并且在溶液中容易被溶剂分子驱赶,导致它们呈现溶剂染色性。前者的Cu–N和Cu–O(acac)键长分别为199.5(4)/202.4(5)和190.6(4)/190.1(4)皮米,彼此相似,而后者的Cu–N(isopropyl)2距离则为206.4(9)皮米,显著长于Cu–NH2距离196(1)皮米。