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Poly[diaquatris(μ4-benzene-1,3-dicarboxylato)diterbium(III)]

✍ Scribed by Rong-Hua, Zeng

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
861 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title terbium coordination polymer, {[Tb 2 (C 8 H 4 O 4 ) 3 -(H 2 O) 2 ]} n , was obtained by the hydrothermal reaction of Tb(NO 3 ) 3 with benzene-1,3-dicarboxylic acid (1,3-BDC) in alkaline aqueous solution. In the asymmetric unit, there are two crystallographically independent Tb III ions: one sevencoordinate Tb centre is coordinated by six O atoms from six 1,3-BDC ligands and one water molecule, and the other Tb centre is eight-coordinate and surrounded by seven O atoms from six 1,3-BDC ligands and one water molecule. The bridging ligands link the metal centres, forming a threedimensional network which is further stabilized by hydrogenbonding interactions. One benzene ring is disordered over two positions with site occupancies of 0.60 (3) and 0.40 (3).

Related literature

De Bettencourt-Dias (2005) and Zhang et al. (2003) have described the use of benzene-1,3-dicarboxylic acid (1,3-BDC) in the construction of supramolecular complexes. Experimental Crystal data [Tb 2 (C 8 H 4 O 4 ) 3 (H 2 O) 2 ] M r = 846.21 Monoclinic, P2 1 =n a = 13.2647 (3) A b = 14.3741 (3) A c = 13.5323 (3) A = 103.944 (1) V = 2504.14 (9) A ˚3 Z = 4 Mo K radiation = 5.68 mm À1 T = 296 (2) K 0.15 Â 0.14 Â 0.11 mm

Data collection Bruker APEX-II area-detector diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 1996) T min = 0.445, T max = 0.538 35926 measured reflections 5182 independent reflections 3834 reflections with I > 2(I) R int = 0.077 Refinement R[F 2 > 2(F 2 )] = 0.034 wR(F 2 ) = 0.073 S = 1.02 5182 reflections 410 parameters 66 restraints H atoms treated by a mixture of independent and constrained refinement Á max = 2.21 e A ˚À3 Á min = À1.08 e A ˚À3

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Poly[di-μ4-benzene-1,4-dicarboxylato-μ6-succinato-dieuropium(III)]
✍ He, Qin ;Huang, Bao-Jun 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 278 KB

The title compound, [Eu 2 (C 4 H 4 O 4 )(C 8 H 4 O 4 ) 2 ] n , has been synthesized by hydrothermal methods. The Eu atom is coordinated by four O atoms from four benzene-1,4dicarboxylate (BDC) anions and four O atoms from three succinate anions in a distorted square antiprismatic coordination geomet