Abstract
A new metal-organic hybrid compound [Fe(O3C4)(COO)]·H2O I has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction. Rust crystals crystallize in the monoclinic system, space group I2/a, a = 6.9651(2) A, b = 8.12630(10) A, c = 19.4245(2) A, β = 92.6600(10)°; V = 1098.25(4) A3; Z = 2 and Dx =3.63g/cm3. The refinement converged into R = 0.042; Rw = 0.058. The structure, determined by single crystal X-ray diffraction, consists of a network of FeO6 centers, octahedral coordinated by btec (btec = 1,2,4,5-benzenetetracarboxylic acid) anions giving rise to a two-dimensional sheet structure. In the compound I, [Fe(O3C4)(COO)]·H2O, the FeO6 group bridged by the 1,2,4,5-benzenetetracarboxyl anion exist in a unit cell, with each anion lying about an inversion centre. One of the FeO2 adistance [1.965(2)] significantly corresponds to the shortest distance as the other and the distances found in the axial direction of compound I.
Highlights
During the past decade, the design and synthesis of crystalline material constructed from molecular clusters linked by extended groups have attracted great attention
Judicious selection of ligands as basic building blocks is of great importance because slight structural changes in the organic building blocks such as length, flexibility, and symmetry can dramatically change the structural motifs of coordination polymers
In spite of the rich coordination chemistry exhibited by H2bdc and H3btc (Chart 1) in the presence of auxiliary ligands and coordinated solvents, barring a few sporadic reports, which mainly concentrate on the direct interaction between the metal ion and the ligand, there have been no serious attempts to prepare metal-organic polymeric or supramolecular structures based on 1,2,4,5benzene tetracarboxylic acid (H4btec) [47-65]
Summary
The design and synthesis of crystalline material constructed from molecular clusters linked by extended groups have attracted great attention. Structural design or modification of the coordination polymers has become a very active field in crystal engineering [20-24] In this process, judicious selection of ligands as basic building blocks is of great importance because slight structural changes in the organic building blocks such as length, flexibility, and symmetry can dramatically change the structural motifs of coordination polymers. In spite of the rich coordination chemistry exhibited by H2bdc and H3btc (Chart 1) in the presence of auxiliary ligands and coordinated solvents, barring a few sporadic reports, which mainly concentrate on the direct interaction between the metal ion and the ligand, there have been no serious attempts to prepare metal-organic polymeric or supramolecular structures based on 1,2,4,5benzene tetracarboxylic acid (H4btec) [47-65]. In consideration of the varieties of topologies and properties, incorporating functional moieties into MOFs is often a popular method used in crystal engineering
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