Abstract
Bis(L-serinium) oxalate dihydrate (BLSOD) crystals synthesized and structure derived from single crystal x-ray diffraction analysis and compared with early reported BLSOD. Compared to the reported structure the present structure has two new C-H…O hydrogen bonding. The hydrogen bonding interactions of O•••H (69.6%), H•••H (24%), C•••H (2.7%), C•••O (1.6%) and 0•••0 (2.1%), are derived from the Hirshfeld surface analysis. The grown crystals characterized by Fourier Transform Infrared (FTIR) and Ultraviolet (UV) spectrum. The optimized structure, HOMO-LUMO, NBO and NLO properties of BLSOD were calculated and compared with early reported BLSOD structure using B3LYP method with 6-31G basis set as provided with Gaussian 5.0 software. The DFT theoretical calculation indicates the new change in the bonding interaction improved the NLO property compared to early reported structure of BLSOD. This may be due to the change in the molecular orientation.
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