The influence of o-phenathroline coordination to zinc isobutylxanthate andzinc diisobutyldithiocarbamate on the inhibiting activity in squalane oxidation and on the electrochemical properties of the complexes

Citation
Vg. Vinogradova et al., The influence of o-phenathroline coordination to zinc isobutylxanthate andzinc diisobutyldithiocarbamate on the inhibiting activity in squalane oxidation and on the electrochemical properties of the complexes, PETR CHEM, 40(6), 2000, pp. 405-409
Citations number
13
Categorie Soggetti
Chemical Engineering
Journal title
PETROLEUM CHEMISTRY
ISSN journal
09655441 → ACNP
Volume
40
Issue
6
Year of publication
2000
Pages
405 - 409
Database
ISI
SICI code
0965-5441(200011/12)40:6<405:TIOOCT>2.0.ZU;2-N
Abstract
The effect of the coordination of o-phenanthroline to zinc diisobutylxantha te (Zn(xant)(2)) and zinc diisobutyldithiocarbamate (Zn(dtc)(2)) on their i nhibiting activity in the initiated oxidation of squalane C30H62 (S-q) with oxygen in a chlorobenzene solution at 75 degreesC was studied. In the abse nce of o-phenanthroline, Zn(xant)(2) and Zn(dtc)(2) retard the initiated ox idation of squalane, the former complex being more active. Additional coord ination of o-phenanthroline to Zn(xant)(2) leads to the loss of the inhibit ing activity by this complex and decreases the efficiency of Zn(dtc)(2) in the squalane oxidation process. The mechanism of the deactivating action of o-phenanthroline was proposed. The voltammetric parameters on a rotating g raphite electrode were determined for the initial chelates and their adduct s with o-phenanthroline.