Role of weak interactions in binding of aryldicarboxylate ion: Synthesis, spectroscopic characterization, single-crystal X-ray structure determination and packing analysis of [Co(phen)2CO3]2(C8H4O4)·15H2O

✍ Scribed by Raj Pal Sharma; Ajnesh Singh; Paloth Venugopalan; William T.A. Harrison

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 954 KB
• Volume: 980
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2010.06.039

✦ Synopsis

To explore the role of weak interactions in aryldicarboxylate binding, the hydrated complex salt, [Co(phen

4 ¼ terephthalateÞ was synthesized and characterized by elemental analyses, spectroscopic studies (IR, UV/Visible, 1 H, 13 C and 59 Co NMR), physical measurements and single-crystal diffraction. Compound 1 crystallizes in space group P 1 and the unit cell contains two complex cations, one terephthalate anion and fifteen water molecules. Two N,N-bidentate 1,10-phenanthroline ligands and one O,O-bidentate carbonate dianion lead to a distorted cis-CoO 2 N 4 octahedral geometry for the metal ion. In the crystal, a supramolecular network built up from CAHÁ Á ÁO water/carboxylate (through second sphere interactions) and OAHÁ Á ÁO water/carboxylate , p-p stacking and CAHÁ Á Áp interactions besides electrostatic forces of attraction help to consolidate the packing. Interestingly a chain of water hexamers and tetramers running along the a-axis also have been observed which is trapped in between the complex cations and terephthalate anions framework.