Schilt, Alfred Ayars, 1927-||Joncich, Michael J.||Vaughn, Joseph W.
M.S. (Master of Science)
Department of Chemistry
This investigation is concerned with the preparation and some of the properties of the dithiocyanato-bis-(1,10-phenanthroline) - metal(II) complexes of iron(II), cobalt(II), nickel(II), copper(II) and zinc(II). Preparation of the thiocyanate complexes was attempted from aqueous solutions and pyridine solutions. Attempts were made to isolate protonated species of the thiocyanate complexes in various acid solutions and in anhydrous hydrogen chloride. Infrared studies of the thiocyanate complexes and the hydrogen chloride addition products of the thiocyanate complexes were carried out in the sodium chloride region of the spectra using Nujol mulls. Insoluble complexes of the type [M(phen)₂(NCS)₂] form in either pyridine or water. The mono-phenanthroline complex of Cu(II) forms more readily in water than the bis-phenanthroline complex of Cu(II). The thiocyanate complexes fail to dissolve in a variety of inorganic and organic solvents. Evidence from the infrared spectra of the bis-phenanthroline complexes indicated that the thiocyanate ligands in all of these complexes are bonded to the metal ions through the nitrogen end and are disposed about the metal ions in a cis configuration. The thiocyanate complexes decompose under the conditions of protonation. Chemical and infrared evidence indicated that when the bis-phenanthroline complexes are exposed to anhydrous hydrogen chloride, 1,10-phenanthroline is displaced and formation of phenanthrolium chloride results.
Fritsch, Kenneth, "Mixed ligand complexes of some metal (II) ions of first transition series with 1,10-phenanthroline and thiocyanate" (1964). Graduate Research Theses & Dissertations. 3984.
ix, 34 pages
Northern Illinois University
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