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Methyl Transfer from Methylcobalt(III) Phthalocyanine to Bromide and Iodide Ions in Sulfolane

Gałęzowski W.

Polish Journal of Chemistry

2001

Vol. 75, nr 7

949-955

Rates of methyl transfer from methylcobalt(III) phthalocyanine (MeCoIIIPc) to bromide and iodide nucleophiles in sulfolane were measured in the temperature range 20-40_C. In contrast to iodide, bromide ion forms an unreactive complex MeCoIIIPcBr-, formation constant for which was determined. Rates of reaction between CoIPc- and methyl iodide were also measured. Identity rate constant for methyl transfer between two CoIPc- nucleophiles of 51M-1 s-1 at 25_C was obtained using the Marcus equation. This identity rate is the largest out of many determined in this solvent.