Comparative Reactivities of Phosphate Ester ... - ACS Publications


Paolo Scrimin*, Giovanna Ghirlanda, Paolo Tecilla, and Robert A. Moss* ... Krassimir Vassilev , Jason Kreider , Paul D Miller , Warren T Ford. Reactiv...
0 downloads 0 Views 58KB Size


3260

Langmuir 1997, 13, 3260

Additions and Corrections Comparative Reactivities of Phosphate Ester Cleavages by Metallomicelles Paolo Scrimin,* Giovanna Ghirlanda, Paolo Tecilla, and Robert A. Moss* Langmuir 1996, 12, 6235-6241. Table 3 on page 6239 contains two errors in column three, entries 2 and 5. The correct Table is the following. Table 3. Rate Constants, kψ, s-1, and k2, M-1 s-1, for the Cleavage of Diesters 6, 7, and 10 with Catalysts TMED C1‚Cu(II) at pH ) 8 and TMED C16‚Cu(II)a at pH ) 7 and 35 °C entry

substrate

catalyst

kψ,b s-1

k2, M-1 s-1

k2/kOH 2

1 2 3 4 5 6 7 8

6 6 6 7 7 7 10 10

none TMED C1‚Cu TMED C16‚Cu none TMED C1‚Cu TMED C16‚Cu CTANO3 TMED C16‚Cu

1.1 × 10-11 c 4.0 × 10-6 2.4 × 10-5 1.1

7.3 × 10-5

In the presence of comicelles made of a blend 10[TMEDC16‚Cu] ) [CTANO3]. At [catalyst] ) 1 × 10-3 M; in the case of the micellar system this is klim. c Rate at 25 °C and pH ) 7 from: Takasaki, B. K.; Chin, J. J. Am. Chem. Soc. 1993, 115, 9337. d Second-order rate constant from ref 5a. e Estimated rate constant allowing for decreased reactivity with respect to 6 due to the substitution of an ethyl for a p-nitrophenyl group. f Temperature was 40 °C. b

a

LA970277L

S0743-7463(97)00277-1 CCC: $14.00

© 1997 American Chemical Society