Structural studies on a novel 2D polymeric barium complex of keto tautomeric form of 2-hydroxynicotinic acid –poly[aqua(μ₃-chlorido)(μ₃-2-oxo-1,2-dihydropyridine-3-carboxylato)barium(II)]

Article type: Research Article

Authors: Drisya, R.^a | Soumya Mol, U.S.^a | Satheesh Chandran, P.R.^a | Simi, C.K.^a | Sudarsanakumar, M.R.^{a; *} | Sudhadevi Antharjanam, P.K.^b

Affiliations: [a] Department of Chemistry, Mahatma Gandhi College, Thiruvananthapuram, Kerala, India | [b] XRD Lab, SAIF, IIT-Madras, Chennai, India

Correspondence: [*] Corresponding author: M.R. Sudarsanakumar, Department of Chemistry, Mahatma Gandhi College, Thiruvananthapuram 695 004, Kerala, India. Tel.: +91 471 2592617; E-mail: sudarsanmr@gmail.com.

Abstract: A 2D barium complex formulated as [Ba(C6H4NO3)(Cl)(H2O)]n was successfully synthesized by gel diffusion technique using hydrosilica gel medium at room temperature. Single crystal X-ray diffraction studies confirm that the complex is triclinic with space group P 1¯ and exhibits a 2D framework by the interconnection of oxobridge and chlorobridge in alternative layers. The unit cell dimensions are a = 5.7737(2) Å, b = 6.8503(2) Å, c = 11.5378(4) Å, α= 106.432(2)°, β= 100.644(2)°, γ= 93.049(2)°. The crystal structure is further stabilized by a 3D one through a pair of N–H ⋯O intermolecular hydrogen bonds to form R22(8) ring motifs. Each barium cation is nine coordinated to form distorted tricapped trigonal prism geometry. The gel grown crystals were characterized by several physico-chemical techniques including elemental analysis, FT-IR, UV-Visible spectral studies, powder X-ray diffraction and thermogravimetry.

Keywords: Gel diffusion technique, single crystal X-ray diffraction, 2D framework, 2-hydroxynicotinic acid

DOI: 10.3233/MGC-170240

Journal: Main Group Chemistry, vol. 16, no. 4, pp. 241-254, 2017