Spectral and crystallographic studies of seven-coordinated complexes

CHED 1244

Jimmy H. Davis, jdavis@uu.edu1, Andrew Eugene McBride1, and Marcus Bond, bond@mbond2.st.semo.edu2. (1) Department of Chemistry, Union University, 1050 Union University Drive, Jackson, TN 38305, (2) Department of Chemistry, Southeast Missouri State University, One University Plaza, Rhodes Hall, Cape Girardeau, MO 63701
Recent research has shown that certain seven-coordinate complexes show catalytic activities in the bleaching of dyes. It has also been shown that the catalytic activities differ with the metal present in the complex. The purpose of this research was to find the physical structure of several complexes with the 2,6-diacetylpyridine bis(benzoylhydrazone) (DAPBH) ligand and first row transition metals and to compare these structures to determine if there is any direct correlation between the physical arrangement and the catalytic activities of the complexes. This was accomplished by synthesizing the metal chloride or nitrate complexes. Crystals were formed by dissolving the complexes in methanol and evaporating off the solvent over the course of several days. The X-ray structures were found using a NONIUS KAPPA-CCD x-ray crystallography instrument (Southeast Missouri State University) under low temperature (100K) conditions to reduce the thermal vibrations.