{6,6′-Diethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}trinitratosamarium(III)copper(II)

Abstract

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.004 Å; R factor = 0.022; wR factor = 0.048; data-to-parameter ratio = 17.0.A heteronuclear Cu II -Sm III complex (systematic name:has been synthesized and structurally characterized. The Cu and Sm atoms are doubly bridged by two phenolate O atoms provided by the Schiff base ligand. The coordination of the Cu atom is square planar, formed by two imine N and two phenolate O atoms. The Sm III atom has a decacoordination environment, formed by the phenolate O atoms, two ethoxy O atoms and two O atoms each from the three nitrates. No classical intermolecular hydrogen bonds are found. Some weak C-HÁ Á ÁO and OÁ Á ÁCu interactions [OÁ Á ÁCu = 3.167 (4) Å ] generate a two-dimensional zigzag sheet. Experimental Crystal data [CuSm(C 20 H 22 N 2 O 4 )(NO 3 ) 3 ] M r = 754.32 Orthorhombic, P2 1 2 1 2 1 a = 8.6208 (8) Å b = 13.8333 (13) Å c = 21.151 (2) Å V = 2522.4 (4) Å 3 Z = 4 Mo K radiation = 3.23 mm À1 T = 293 (2) K 0.28 Â 0.17 Â 0.15 mm Data collection Bruker APEXII area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2004) T min = 0.533, T max = 0.622 19177 measured reflections 6184 independent reflections 5236 reflections with I > 2(I) R int = 0.024

{6,6′-Dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}methanol-μ-nitrato-dinitratosamarium(III)nickel(II)

“…(Baggio et al, 2000;Caravan et al, 1999;Edder et al, 2000;Knoer et al, 2005). As part of our investigations into the structure and applications of 3 d-4f hetorometallic Schiff base complexes (Sui et al, 2006;Sui et al, 2007), we report here the synthesis and X-ray crystal structure analysis of the title complex, x, 1/2 -y, 1/2 + z). these link the molecules into a two-dimensional layer structure (Fig 2).…”

“…For related literature, see: Baggio et al (2000); Caravan et al (1999); Edder et al (2000); Knoer et al (2005); Sui et al (2006Sui et al ( , 2007.…”

{6,6′-Dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}methanol-μ-nitrato-dinitratolutetium(III)zinc(II)

“…supporting information The potential applications of trivalent lanthanide complexes as contrast agent for magnetic resonance imaging and stains for fluorescence imaging have prompted considerable interest in the preparation, magnetic and optical properties of 3 d-4f hetorometallic dinuclear complexes (Baggio et al, 2000;Caravan et al, 1999;Edder et al, 2000;Knoer et al, 2005). As part of our investigations into the structure and applications of 3 d-4f hetorometallic Schiff base complexes (Sui et al, 2006;Sui et al, 2007), we report here the synthesis and X-ray crystal structure analysis of the title complex, (I), a symmetry codes: (i)1/2 + x, 1/2 -y, 1/2 + z). these link the molecules into a two-dimensional layer structure (Fig 2).…”

{6,6′-Dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}methanol-μ-nitrato-dinitratopraseodymium(III)zinc(II)

“…For related literature, see: Baggio et al (2000); Caravan et al (1999); Edder et al (2000); Knoer et al (2005); Sui et al (2006Sui et al ( , 2007.…”

“…As part of our investigations into the structure and applications of 3 d-4f hetorometallic Schiff base complexes (Sui et al, 2006;Sui et al, 2007), we report here the synthesis and X-ray crystal structure analysis of the title complex, (I…”