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A hydrogen bonded compound namely, 2-aminopyridinium monochloroacetate monochloroacetic acid (2APMCA) has been synthesized and crystallized by solvent slow evaporation process. Single crystal X-ray diffraction (SCXRD) study has been employed to determine the 3-D structure and hydrogen bonds of the compound. Protonation on the N-site of the 2-aminopyridine has been confirmed from elongated C N bond distances [1.325(5) to 1.328 (5) Å] and C N-C bond angle [122.5(4)°]. The cations and anions of adjacent units are interconnected by one bifurcated and one unbifurcated N H...O hydrogens bonds leading to ring R 1 2(4) and R 2 1(6) motifs. Computational quantum chemical studies such as frontier molecular orbitals (FMOs) and atomic charge distributions have been performed by using density functional theory (DFT) with the standard 6–311++ G (d,p) basis set. The plot of FMOs has been found to be localized to the highest occupied molecular orbital (HOMO) region on the cation and the lowest unoccupied molecular orbital (LUMO) region has surrounded by anion. The antibacterial activity of the synthesised compound has been assessed by using the well diffusion method. In addition, molecular docking studies of the breast cancer proteins investigate to determine the binding efficiency of the title compound. [Display omitted] [ABSTRACT FROM AUTHOR]

A novel metal-organic compound, [(C 5 H 7 N 2) 2 + (SnCl 6)2-] has been synthesized by the one-step hydrothermal method. Hydrothermally synthesized material has been studied by single-crystal XRD, UV–visible spectral and dielectric analyses. The single-crystal XRD study has been employed to determine the three dimensional structure and hydrogen bonds of the compound. The octahedrons of the anions are packed between the layers of 2-aminopyridinium cation and strongly connected through classical and non-classical hydrogen bonds. The optical transmittance and the cut-off wavelength have been confirmed by UV–visible study. The temperature-dependent dielectric properties, thermal, hardness, and nonlinear properties have been systematically investigated. Frontier molecular orbitals (FMOs) analysis has been done by density functional theory (DFT) at the LANL2DZ level. The plot of FMOs has found to be localized to the highest occupied molecular orbital (HOMO) region on the cation while the lowest unoccupied molecules orbitals (LUMO) region has surrounded by anion. [Display omitted] • The novel hybrid compound [(C 5 H 7 N 2) 2 + (SnCl 6)2-] has been synthesized by hydrothermal method. • A three-centered bifurcated N–H⋯Cl hydrogen bond leads a ring R 1 2(4) motif. • Mechanical, thermal, optical and NLO properties have been investigated. • The grown crystal exhibits third order optical nonlinear properties. • Computational study has been done at DFT/LANL2DZ level. [ABSTRACT FROM AUTHOR]