新颖的二维超分子化合物[CoⅢ(aea)(2,2''''-bipy)]Cl·H2O的水热合成及结构表征

0IntroductionInrecentyearsgreatattentionhasbeenpaidtosupramolecularchemistryandawidevarietyofnet鄄workshavealreadybeenconstructedbasedupontheprincipleofcrystalengineering[1~3].Usually,variousmultifunctionalorganicligands,bothrigidandflexiblemulticarboxyli…     

新颖的二维超分子化合物[CoⅢ(aea)(2,2′-bipy)]Cl·H2O的水热合成及结构表征(英)

A new compound [Co^Ⅲ(aea)(2,2′-bipy)]Cl·H₂O (aea=N-(2-aminoethyl)aspartate, 2,2′-bipy=2,2′-bipyridine) was hydrothermally synthesized and structurally characterized, which contains a new quadridentate ligand (aea) came from malic acid and ethylenediamine via in-situ reaction. The asymmetric molecules are interconnected through N-H…O hydrogen bond to form helical chains that are further hold together into a two-dimensional network via the N-H…Cl hydrogen bond. The formation of aea can be considered as the substitution of hydroxyl group in malate by ethylenediamino group, which presents a type of new in-situ ligand reaction. CCDC: 222018.     

酸碱软硬度的键参数标度

本文以有效核电荷Ｚ＊、半径ｒ和电负性Ｘ为参数，提出一种新的酸碱软硬度的键参数标度法，以ｆ＝Ｚ＊／ｒ２－２０Ｘ＋２４作为软硬酸的标度参数，不仅可以标度各种简单离子，对原子也同样适用；以＝Ｚ＊／ｒ２＋５Ｘ－１５作为软硬碱的标度参数，并推知对于碱的软硬度大致可用电负性来衡量。该标度法可定量比较酸碱的软硬度，结果与Ｐｅａｒｓｏｎ分类基本一致