Document Type
Thesis
Date of Award
1977
Abstract
Proton nmr linebroadening studies of dimethylsulfoxide (DMSO) +3 in tris (ethylenediamine) chromium(III) (Cr(en)3 +3)-DMSO solutions were conducted between 20° and 90°C. The resulting data were interpreted using the Swift-Connick relationships. The dominant contribution to linebroadening in the temperature range of 20° - 50°C was a second - coordination sphere exchange process. Above 70°C, the dominant process was a mixture of first coordination sphere exchange process of partially +3 dissociated Cr(en) 3+3 and second coordination sphere T2m-1 relaxation. The kinetic parameters for the first and second coordination sphere processes are ΔΗ≠0 = 24 kcal/mol, k1 = 24 sec-1 and ΔΗ≠= 8.8 kcal/mol, and k1 = 2.1 x 103 sec-1 A discussion is given of the possibility of electron transfer through second coordination sphere bonding.
Recommended Citation
Harris, Marvin Eugene Jr, "NMR Linebroadening and Contact Shift Studies of Transition Metal Complexes in Nonaqueous Solvents." (1977). All ETDs from UAB. 7050.
https://digitalcommons.library.uab.edu/etd-collection/7050
Comments
MS - Master of Science/Master of Surgery; ProQuest publication number 31751970