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Metal complexes of divalent copper (1–2), cobalt (3), and nickel (4) with mixed ligands acetylacetone (acac) and adenine were prepared and characterized by IR, mass spectra, elemental and thermal analysis. The X-ray crystal structures of {[Cu(acac)2(adenine)]·EtOH} complex (1) and {[Cu(acac)2(adenine)]·DMF·H2O} (2) were determined. Compound (1) crystallizes in the triclinic space group P − 1 with a = 7.547(3) A, b = 7.828(3) A, c = 17.791(6) A, α = 79.538(6)°, β = 82.240(7)°, γ = 86.010(6)°, V = 1023.1(6) A3, and Z = 2. Complex (1) forms a hydrogen bonded 2:2 complex {[Cu(acac)2(adenine)]2:[EtOH]2} arranged in bilayers. Complex (2) crystallizes in the triclinic space group P − 1 with a = 7.828(2) A, b = 8.095(2) A, c = 16.995(5) A, α = 78.508(5)°, β = 84.949(5)°, γ = 89.285(5)°, V = 1051.2(5) A3, and Z = 2. Complex (2) also forms bilayers with H-bonded DMF. Thermal analysis TG and DSC of the compounds (25–800 °C, under N2) reveals the disproportionation of ligands with the associated heat. Metal complexes of divalent copper, cobalt, and nickel with mixed ligands acetylacetone (acac) and adenine were prepared and characterized by IR, mass spectra, elemental and thermal analysis. The X-ray crystal structures of {[Cu(acac)2(adenine)]·EtOH} complex (1) and {[Cu(acac)2(adenine)]·DMF·H2O} (2) were determined. Complex (1) forms a hydrogen bonded 2:2 complex {[Cu(acac)2(adenine)]2:[EtOH]2} arranged in bilayers. Complex (2) also forms bilayers with H-bonded DMF.

The synthesis and X-ray crystal structure of [Cu(C7H3NO4)(C6H7NO)], [Cu(dipic)(4-MeO-Py)], (dipic = pyridine-2,6-dicarboxylate, 4-MeO-Py = 4-methoxypyridine), is described. Molecules of [Cu(dipic)(4-MeO-Py)] are formed {via} coordination of the copper(II) cation to two nitrogen atoms, from the dipic and 4-MeO-Py ligands respectively, and to two oxygen atoms from the carboxylate groups of the dipic ligand. The molecules pack in a non-centrosymmetric manner, stacked eclipsed with respect to one another along the b-axis and aligned parallel in a head-to-tail motif. The title compound crystallizes in the orthorhombic space group, Pca2(1), with a = 27.339(3) A, b = 3.7130(4) A, c = 11.6859(12) A, V = 1186.2(2) A3, and Z = 4. The structure was solved by direct methods and refined by least-squares methods to a final R-factor of 0.0327 for 2648 independent reflections.