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RUSSIAN JOURNAL OF COORDINATION CHEMISTRY, vol.40, no.9, pp.686-694, 2014 (SCI-Expanded)
Two novel homobinuclear ytterbium(III) complexes, [Yb-2(2AMB)(6)(H2O)(4)] center dot 2C(2)H(6)O (I) and Yb-2(3AMB)(6)(H2O)(4)] center dot 3H(2)O (II) (2AMB = 2-aminobenzoic acid, 3AMB = 3-aminobenzoic acid) have been synthesized and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis and X-ray crystallography (CIF files CCDC nos. 950103 (I), 921652 (II)). Complex I crystallizes in triclinic space group and complex II crystallizes in monoclinic space group P2(1)/n. X-ray analysis shows that both complexes (I, II) have the dinuclear structure. The central Yb3+ ions in both complexes are eight-coordinated adopting distorted YbO8 dodecahedral geometry. Each Yb3+ ion is coordinated to two O atoms from bridging carboxylate, four O atoms from the chelating carboxylate ligands and two O atoms of water molecules. The crystal structure of I and II are stabilized by N-HaEuro broken vertical bar O, O-HaEuro broken vertical bar O, O-HaEuro broken vertical bar N, and C-HaEuro broken vertical bar O hydrogen bonds, C-HaEuro broken vertical bar pi interactions and weak pi-pi stacking interactions.