Syntheses, Crystal Structures, and Electrochemical Properties of Dehydroabietic Acid-based Schiff Bases

Two Schiff bases (DAMBA-Fc and DAA-Fc) derived from dehydroabietic acid have been successfully synthesized and characterized by means of FT-IR, elemental analysis, FIRMS, and NMR spectroscopy. The crystal structure of DAA-Fc can be determined by single-crystal X-ray diffraction. The compound is of monoclinic system, space group P2(1) with a = 10.7379(6), b = 7.5004(4), c = 33.3294(18) angstrom, beta = 97.996(3)degrees, Z = 4, V = 2658.2(3) angstrom(3), M-r = 481.48, D-c = 1.203 g/cm(3), S = 1.034, mu = 0.585 mm(-1), F(000) = 1032, the final R = 0.0566 and wR = 0.0701 for 5645 observed reflections (I > 2 sigma(I)). In addition, cyclic and differential pulse voltammogram techniques have been applied to differentiate the redox properties of the aromatic- and aliphatic-connected Schiff bases DAMBA-Fc and DAA-Fc, respectively.