Synthesis and Structural Determination of a Novel Heterometallic Complex [Sb₂(edta)₂‐µ₄‐Co(H₂O)₂]·5.15H₂O

Abstract

The novel three-dimension edta-linked (edta＝ethylenediamine-N,N,N′,N′-tetraacetate) heterometallic complex [Sb 2 (edta) 2 -µ 4 -Co(H 2 O) 2 ]•5.15H 2 O has been synthesized and characterized by elemental analyses, FT-IR spectrum, X-ray diffraction analyses and thermogravimetry-differential scanning calorimetry (TG-DSC). The complex crystallizes in the monoclinic system, space group P2 1 /n, lattice parameters: a＝0.69969 (2) the Sb(III) ion is six coordinated by two nitrogen and four oxygen from edta ions, together with a lone electron pair at the equatorial position. In the complex, the coordination number of Co(II) ion is six and its coordination environment is composed of four carboxylic oxygen atoms from four different edta ions and two oxygen atoms from two H 2 O molecules. The degradation of the sample proceeds in several steps and the water molecules and ligands are successively emited.

Synthesis, Structural Characterization, and Antibacterial Activity of Novel Erbium(III) Complex Containing Antimony

“…It is found that the absorption peak ν as (COO − ) at 1690 cm −1 of Na 2 H 2 edta is shifted red to 1593 cm −1 and the absorption peak ν s (COO − ) at 1353 cm −1 of Na 2 H 2 edta is shifted blue to 1402 and 1385 cm −1 in the complex. The difference values [Δ ν ( ν as  −  ν s ) = 191 and 208 cm −1 ] between the frequencies of the asymmetric and symmetric stretching vibration confirm that the oxygen atoms of carboxylic groups are coordinated to metallic ions by the monodentate mode and bidentate bridge mode in the complex [42], and it is in agreement with the crystal structure. The weaker absorption peaks at about 1356 and 828 cm −1 may be from the stretching vibrations in the free nitrate ion.…”

Solid-Solid Synthesis, Characterization and Thermal Decomposition of Thiourea Complex of Antimony Trichloride

“…Some antimony complexes have been mainly used in the clinic medicine because of their medicinal utility and biological activity [1][2][3][4][5][6]. To synthesize new complexes of antimony will be interesting not only for the main group elements chemistry but also for the bioinorganic chemistry.…”