abstract
Orange Coloured single crystals of [Co(phen)(3)]Cl[(CH3)(3)C6H2SO3](2)center dot 11H(2)O were obtained, when the solution obtained by mixing separately dissolved, tris(1,10-phenanthroline)cobalt(III)chloride and sodium salt of mesitylenesulphonic acid in aqueous medium in 1:3 molar ratio was allowed to evaporate slowly at room temperature. The newly synthesized complex salt was characterized by elemental analyses, TGA, spectroscopic studies (IR, UV/Visible, H-1, C-13 and Co-59 NMR), conductance and solubility product measurements. Single crystal X-ray structure determination of [Co(phen)(3)]Cl[(CH3)(3)C6H2SO3](2)center dot 11H(2)O revealed that complex salt crystallizes in the monoclinic crystal system with space group P2(1)/c where a = 17.7628(4), b = 15.7546(3), c = 20.8338(5)angstrom, beta = 104.691(1), V = 5639.65 angstrom(3), Z = 4. The asymmetric unit consists of one cation, one chloride, two mesitylenesulphonate ions and eleven lattice water molecules. Crystal lattice is stabilized by hydrogen bonding interactions of type C-H center dot center dot center dot O, C-H center dot center dot center dot Cl through second sphere coordination and O-H center dot center dot center dot O interactions besides the electrostatic forces of attractions. The solubility product measurements indicated that the affinity of cationic metal complex tris(1,10-phenanthroline)cobalt(III), [Co(phen)(3)](3+) is greater for mesitylenesulphonate ion than for chloride ion in aqueous medium. The structural studies suggest that [Co(phen)(3)](3+) is a potential anion receptor for the mesitylenesulphonate ion. This is the first crystal structure report of [Co(phen)(3)](3+) complex cation with any arylsulphonate ion. (C) 2008 Elsevier B.V. All rights reserved.
keywords
DOT-CENTER-DOT; HYDROGEN-BOND PATTERNS; METAL RECEPTOR SYSTEMS; GRAPH-SET ANALYSIS; 2ND-SPHERE COORDINATION; TRANSITION-METAL; FLUORESCENT CHEMOSENSORS; SELECTIVE RECOGNITION; TEMPLATED SYNTHESIS; C-H...O
subject category
Chemistry
authors
Sharma, RP; Singh, A; 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.