A series of eight compounds with bis-diamine cores were prepared and their electrochemical behavior was explored polarographically. The behavior of the compounds was studied at the dropping mercury electrode and the rotating platinum electrode.
Trans-dinitro-bis-(ethylenediamine) cobalt (III) nitrate shows reversible behavior in well-buffered solutions at the dropping mercury electrode, The mechanism for the reduction is proposed as; rapid, reversible election transfer; decomposition of the reduced species; and, in solutions sufficiently alkaline, the formation of tris-(ethylenediamine) cobalt (II), thereby accounting for the observed second wave.
The reduction of cis dithiocyanato-bis-(ethylenediamine) cobalt (III) thiocyanate and oxalato-bis-(ethylenediamine) cobalt (III) chloride both give irreversible waves, thereby complicating any proposal of a mechanism. The observed second reduction wave, though, appears to be caused by the formation of tris-(ethylenediamine) cobalt (II), as in the case of the dinitro compound.
A proposal of the mechanism for the other five compounds was not possible as they either reduced at too positive a potential, aquated too rapidly, or both. / Master of Science
| Identifer | oai:union.ndltd.org:VTETD/oai:vtechworks.lib.vt.edu:10919/41963 |
| Date | 07 April 2010 |
| Creators | White, Richard Lee |
| Contributors | Chemistry |
| Publisher | Virginia Tech |
| Source Sets | Virginia Tech Theses and Dissertation |
| Detected Language | English |
| Type | Thesis, Text |
| Format | vi, 85 leaves, BTD, application/pdf, application/pdf |
| Rights | In Copyright, http://rightsstatements.org/vocab/InC/1.0/ |
| Relation | OCLC# 22484149, LD5655.V855_1962.W495.pdf |
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