Kinetics of reduction of a series of imidazolium ions and cobalt(III)-imidazole complexes by 1-hydroxy-1-methylethyl radicals

Journal Article · Wed Nov 29 00:00:00 EST 1989 · Inorganic Chemistry; (USA)

DOI:https://doi.org/10.1021/ic00323a008· OSTI ID:7196965

Bakac, A; Espenson, J H ^[1]; Butkovic, V; Lovric, J; Orhanovic, M ^[2]

---

1. Iowa State Univ., Ames (USA)
2. Rudjer Boskovic Institute, Croatia (Yugoslavia)

The rates of electron transfer from {sup {sm bullet}}C(CH{sub 3}){sub 2}OH to a series of imidazolium ions and to a series of (NH{sub 3}){sub 5}Co(X-Im){sup 3+} complexes have been measured. A kinetic competition method based on the homolytic scission of the chromium-carbon bond in (H{sub 2}O){sub 5}CrC(CH{sub 3}){sub 2}OH{sup 2+} was used to evaluate rate constants for the reducing agent {sup {sm bullet}}C(CH{sub 3}){sub 2}OH. In both series the rate constants show sensitivity to substituents on the imidazole ring. The rate constants for the free imidazolium ions are correlated by an LFER to the relative electron affinity of the imidazolium ion. The rate constants for the cobalt(III)-imidazole complexes are correlated by the lowest energy d-d absorption band of the complexes. 15 refs., 4 figs., 5 tabs.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 7196965
• Journal Information: Inorganic Chemistry; (USA), Vol. 28:24; ISSN 0020-1669
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALKYL RADICALS
CHEMICAL REACTIONS
COBALT COMPLEXES
HYDROXY COMPOUNDS
IMIDAZOLES
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
AZOLES
COMPLEXES
DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
KINETICS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
RADICALS
REACTION KINETICS
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties