The preparation and kinetics of a sterically hindered gold (III) complex

Author

Michael R. Golden, Union College - Schenectady, NY

Date of Award

6-1978

Document Type

Open Access

Degree Name

Masters of Science

Department

Chemistry

First Advisor

Charles F. Weick

Language

English

Abstract

The alkyl substituted gold (III) complex [Au(1, 4, 7-Me3dien)Cl] (PF6)2 [where 1, 4, 7-Me3dien respresents (CH3) HNCH2CH2N(CH3)CH2CH2NH(CH3)] has been synthesized. The cation of this compound differs from previously synthesized gold (III) complexes of similar structure since it can form a conjugate base only by loss of hydrogen from a terminal nitrogen. Aqueous solution chemistry studies of this ion reveals that the Cl- is hydrolyzed before loss of a proton from the ligand which is the reverse of the sequence observed with previously studied ions. Monobromo substitution rates are found to be slower than for the complex with no alkyl substitution but faster than for the completely methylated complex. A rate constant of kBr = 17 –mole-1-sec-1 was obtained. The rate of chelate ligand unwrapping from the monobromo complex was also studied. This process was discovered to be second order in Br- with a rate constant of k = 15 –mole-2 –sec-1

Recommended Citation

Golden, Michael R., "The preparation and kinetics of a sterically hindered gold (III) complex" (1978). Honors Theses. 1862.
https://digitalworks.union.edu/theses/1862