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Reaction of CH/sub 2/C(CH/sub 3/)/sub 2/OH radicals with cobalt(II) tetrasulfophthalocyanine in aqueous solutions. A pulse radiolytic study

Journal Article · · Inorg. Chem.; (United States)
DOI:https://doi.org/10.1021/ic00163a012· OSTI ID:5030952

The reaction of cobalt(II) tetrasulfophthalocyanine, (Co/sup II/(tspc))/sup 4 -/, with CH/sub 2/C(CH/sub 3/)/sub 2/OH free radicals was studied. The results indicate that the first product formed is ((tspc)Co/sup III/CH/sub 2/C(CH/sub 3/)/sub 2/OH)/sup 4 -/. This product loses water via ..beta.. elimination to yield ((tspc)Co/sup III/CHchemically bondchemically bondC(CH/sub 3/)/sub 2/)/sup 4 -/. The decomposition of the latter compound yields (Co/sup I/(tspc))/sup 5 -/ + OCHCH(CH/sub 3/)/sub 2/ at pH greater than or equal to 9.5, (Co/sup III/(tspc))/sup 3 -/ + CH/sub 2/chemically bondchemically bondC(CH/sub 3/)/sub 2/ at pH approx.6, and mainly (Co/sup II/(tspc))/sup 4 -/ plus equal amounts of CH/sub 2/chemically bondchemically bondC(CH/sub 3/)/sub 2/ and OCHCH(CH/sub 3/)/sub 2/ at pH approx.3. The results suggest that a pK of the water molecule trans to the aliphatic residue affects the mechanism of hydrolysis. A further reaction is observed, the exact nature of which is not fully understood. For comparison purposes the oxidation of )Co/sup II/(tspc))/sup 4 -/ by Br/sub 2//sup -/ and its reduction by CO/sub 2//sup -/ were studied. 6 figures, 1 table

Research Organization:
Nuclear Research Center Negev, Beer-Sheva, Israel
OSTI ID:
5030952
Journal Information:
Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 22:21; ISSN INOCA
Country of Publication:
United States
Language:
English

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