Abstract
Complexes of four non-steroidal anti-inflammatory drugs (NSAIDs): phenylobutazone, nimesulide, diclofenac and meloxicam with Cu2+ have been theoretically investigated using B3LYP/6-31G∗∗ method. The potential copper binding sites for the selected drugs have been found. Complexation of the investigated drug with Cu2+ can significantly change of the ligand geometry as for phenylobutazone and nimesulide or conformation of the drug can be persistent during complexation with Cu2+ as for meloxicam. For the last compound presence of Cu2+ influences the intramolecular OHO hydrogen bond. For the lowest energy complexes interaction of Cu2+ with the drug has been investigated in the frame of Atom in Molecule (AIM) theory.
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