Synthesis, Single Crystal Structural Investigation, Hirshfeld Surface Analysis, Thermoanalysis and Spectroscopic Study of Two New Cu(II) and Co(II) Transition-Metal Complexes

Two new complexes, [Cu(dimpyr)2(H2O)2](NO3)2.2H2O (1) and (Hamdimpy)2[CoCl4].H2O (2), with the monodentate ligand 2-amino-6-methylpyrimidin-4-(1H)-one (dimpyr) countercation 4-amino-2,6-dimetylpyrimidium (Hamdimpy), respectively, were prepared characterized by single crystal X-ray diffraction, elemental analysis IR spectroscopy. In (1), Cu(II) cation is tetracoordinated, in a square plan fashion, two nitrogen atoms from pyrimidine ring of organic oxygen coordinated water molecules. atomic arrangement, CuO2N2 planes are interconnected via formation O-H…O hydrogen bonds involving both free molecules NO3− nitrate anions to form inorganic layers parallel (a, b) plane at z = (2n + 1)/4. central atom Co(II) four-coordinated distorted tetrahedral fashion four Cl− ions. The [CoCl4]2− tetrahedra arranged (1¯10) x 1)/2 cations grafted between them establishing CH…Cl NH…Cl types. vibrational absorption bands identified infrared Raman Intermolecular interactions investigated Hirshfeld surfaces electronic properties such as HOMO LUMO energies derived. compounds thermal determine their behavior respect temperature.