Magnetic field effects on the Mn(5NO/sub 2/SMDPT)-catalyzed oxidation of 2,6-di-tert-butylphenol: /sup 2/H and /sup 17/O magnetic isotope effects
The effect of a magnetic field between 0 and 70 kG on the rate of catalytic oxidation of 2,6-di-tert-butylphenol (DTBP) to form 2,2',6,'-tetra-tert-butyldiphenoquinone (DPQ) by (bis(3-((5-nitrosalicylidene)amino)propyl)methylaminato)manganese(II) (Mn(5NO/sub 2/SMDPT)) in the presence of O/sub 2/ is reported. No kinetic /sup 2/H isotope effect is observed with DTBP-O-d, and DTBP-4,O-d/sub 2/ exhibits mass and magnetic kinetic isotope effects of 1.46 and 1.23, respectively. No /sup 17/O kinetic isotope effect is observed for isotopically enriched O/sub 2/. These results are compared to the rate of oxidation of DTBP-4,O-d/sub 2/ exhibits a /sup 2/H kinetic isotope effect of 1.28. The rate of oxidation of the proposed intermediate 4,4'-dihydroxy-3,3',5,5'-tetra-tert-butylbiphenyl (TTBBP) by Mn(5NO/sub 2/SMDPT) or Pb(OAc)/sub 4/ gives a maximum rate relative to zero magnetic field of 1.09 /plus minus/ 0.06 or 1.02 /plus minus/ 0.07, respectively. These results are discussed in terms of a proposed mechanism. 22 refs., 2 figs., 2 tabs.
- Research Organization:
- Tufts Univ., Medford, MA (USA)
- OSTI ID:
- 5614249
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 27:7; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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400201* -- Chemical & Physicochemical Properties
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
AROMATICS
CHEMICAL REACTIONS
COMPLEXES
DATA
DEUTERIUM
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
HYDROGEN ISOTOPES
HYDROXY COMPOUNDS
INFORMATION
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
MAGNETIC FIELDS
MANGANESE COMPLEXES
NITROGEN COMPOUNDS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXIDATION
OXYGEN 17
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PHENOLS
STABLE ISOTOPES
TRANSITION ELEMENT COMPLEXES