Structural Characterization of Two Copper(II) Bishexafluoroacetylacetonate Complexes with N-Donor Ligands

The synthesis and characterization of two copper complexes, Cu(hfac)2(L1)2 (1) and Cu(hfac)2(L2)2 (2) (L1 = (E)-3-(4-(1H-benzo[d]imidazol-1-yl)phenyl)-1-([1,1′-biphenyl]-4-yl)prop-2-en-1-one, L2 = (E)-3-(4-(1H-imidazol-1-yl)phenyl)-1-phenylprop-2-en-1-one) are reported. These complexes are characterized by elemental analyses, IR and single crystal X-ray diffraction analyses. The Cu(II) ions of 1 and 2 are both in a distorted octahedral environment with four O atoms of the hfac ligands and two N atoms from two L ligands. The supramolecular structures of 1 and 2 are stabilized by hydrogen bonds between the adjacent molecules. In addition, F···F interactions and π–π stacking interactions are also responsible for the stability of the structure in complex 2.