abstract
In an effort to explore [Co(phen)(3)](3+) complex cation as anion receptor for biologically important saccharinate ion, yellow coloured single crystals of [Co(phen)(3)](C(7)H(4)NSO(3))(3).8.5H(2)O were obtained by slow evaporation of solution, obtained by mixing the separately dissolved, tris(1,10-phenanthrol line)cobalt(III)chloride and sodium saccharinate in aqueous medium in 1:3 molar ratio. The newly synthesized complex salt was characterized by elemental analysis, TGA, conductance, solubility product measurements and spectroscopic studies (IR, UV/Visible, (1)H and (13)C NMR). Single crystal X-ray structure determination of [Co(phen)(3)](C(7)H(4)NSO(3))(3).8.5H(2)O revealed that compound crystallizes in the triclinic crystal system with space group P (1) over bar where a=12.3795(4), b=12.7598(4), c=19.0414(5) A, alpha = 71.544(2), beta = 76.457(2), gamma = 9 77.213(2)degrees, V=2738.19(14)angstrom(3), Z = 2. The crystal lattice is stabilized by hydrogen bonding interactions of type G-H... 0 and C-H... 0 (through second sphere coordination) besides the electrostatic forces of attraction. The solubility product and conductance measurements indicated that the affinity of cationic tris(1,10-phenanthroline) cobalt (III), [Co(phen)(3)](3+) is greater for saccharinate ion than for chloride ion in aqueous medium. The structural studies suggest that [Co(phen)(3)](3+), is a potential anion receptor for the saccharinate ion. (c) 2008 Elsevier B.V. All rights reserved.
keywords
2ND SPHERE COORDINATION; CRYSTAL-STRUCTURES; SPECTROSCOPIC CHARACTERIZATION; MOLECULAR-STRUCTURE; METAL-COMPLEXES; HOST MOLECULES; BINDING; HEMIHYDRATE; SPECTRA; LIGANDS
subject category
Chemistry
authors
Singh, A; Sharma, RP; Brandao, P; Felix, V; Venugopalan, P
our authors
Paula Cristina Ferreira da Silva Brandão
Assistant Researcher
Vítor Félix
Associate Professor with Aggregationacknowledgements
The authors gratefully acknowledges the financial support of CSIR vide Grant No. 01(2020) 2005/EMR-II.