Journal
CRYSTALS
Volume 8, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/cryst8120455
Keywords
Cu(II)-IDA polymer; crystal structure; noncovalent interaction; Hirshfeld surface; density functional theory(DFT); atoms-in-molecules (AIM); noncovalent interaction (NCI) plot
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In this study, a new equimolar (1:1:1) mixed ligand Cu(II) polymer, [Cu(IDA)(ImP)](n) (1) with iminodiacetato (IDA) and imidazo[1,2-a]-pyridine (ImP) was synthesized and characterized by single crystal X-ray diffraction analysis. X-ray crystallography reveals that compound (1) consists of polymeric zigzag chain along [010] the carboxylate carbonyl oxygen atom by two-fold symmetry screw axis. The solid-state structure is stabilized through C-H center dot center dot center dot O hydrogen bonds and C-H center dot center dot center dot pi interactions that lead the molecules to generate two-dimensional supramolecular assemblies. The intricate combinations of hydrogen bonds and C-H center dot center dot center dot pi interactions are fully described along with computational studies. A thorough analysis of Hirshfeld surface and fingerprint plots elegantly quantify the interactions involved within the structure. The binding energies associated with the noncovalent interactions observed in the crystal structure and the interplay between them were calculated using theoretical DFT calculations. Weak noncovalent interactions were analyzed and characterized using Bader's theory of atoms-in-molecules (AIM). Finally, the solid-state supramolecular assembly was characterized by the Noncovalent Interaction (NCI) plot index.
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