The Effect of Carboxylic Geometry on Two Cu(II) Complexes

Abstract

The introduction of two types of organic carboxylate ligands into the Cu(II)/phen system leads to the formation of two new complexes, namely [Cu(L1)(phen)(H₂O)₂·NO₃] (1) and [Cu(L2)(phen)₂(H₂O)·2H₂O] (2) (HL1 = 2-ethoxynicotinic acid and H₂L2 = 4,5-dihydroxybenzene-1,3-disulfonic acid). In 1 and 2, both of them are mononuclear structures, which could be linked by the hydrogen-bonded interactions into 3D motifs. However, the types of the hydrogen interactions and resulting motifs are different. The difference of final structures can be attributed to the effect of carboxylate ligands.

Supplementary materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental figure.

Keywords:

• hydrogen bond
• rigid ligand
• structure

Acknowledgments

The authors acknowledge financial assistance from Sichuan University of Science and Engineering, the Institute of Functionalized Materials (grant nos. 2011KY02 and 2012KY12), the Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education (No. LYJ1207), and the Education Committee of Sichuan Province (No. 12ZA090 and 13ZB0131).