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Journal of Structural Chemistry

2015 year, number 1

CRYSTAL STRUCTURES AND CHARACTERIZATION OF TWO ONE–DIMENSIONAL COORDINATION POLYMERS CONTAINING Ln3+ IONS AND ANTHRANILATE (C7H6NO2) ANIONS

S. Hussain1, I.U. Khan1, W.T.A. Harrison2, M.N. Tahir3, S. Ahmad4
1Government College University, Lahore, 54000, Pakistan
2University of Aberdeen, Aberdeen AB24 3UE, Scotland
3University of Sargodha, Sargodha, Pakistan
4University of Engineering and Technology, Lahore, Pakistan
Keywords: cerium, praseodymium, anthranilate anion, synthesis, crystal structure, one dimensional coordination polymer

Abstract

The syntheses, crystal structures and characterization (IR, TGA/DSC) of the isostructural one-dimensional coordination polymers [Ce(C 7H 6NO 2) 3] n ( 1) and [Pr(C 7H 6NO 2) 3] n ( 2) are described. The metal ions adopt distorted capped square anti-prismatic MO 9 coordination geometries. The anthranilate ligands bridge the metal ions in bridging-bidentate (O, μ 2-O') mode to generate [010] chains in the crystal and each ligand features an intramolecular N-H⋯O hydrogen bond. It is notable that two very similar, but crystallographically distinct chains appear in the unit cell. Crystal data: 1, C 21H 18CeN 3O 6, M r = 548.51, monoclinic, P2 1/ c (No. 14), a = 25.0476(10) Å, b = 7.4924(2) Å, c = 24.6366(7) Å, β = 119.424(1)°, V = 4027.1(2) Å 3, R( F) = 0.037, wR( F 2) = 0.068. 2, C 21H 18N 3O 6Pr, M r = 549.29, monoclinic, P2 1/ c (No. 14), a = 25.0077(13) Å, b = 7.4497(3) Å, c = 24.6063(12) Å, β = 119.392(2)°, V = 3994.1(3) Å 3, R( F) = 0.031, wR( F 2) = 0.068.

DOI: 10.1134/S0022476615010187