Dramatically enhanced carbon acidity of the nitrobenzyl fragment in a nickel(II) scorpionate complex.
The -CH(2)- group of the 2-nitrobenzyl pendant arm of the scorpionate complex I deprotonates in basic aqueous solution (pK(a) = 10.6), due to the coordination of the nitronate group to the nickel(II) center. Metal coordination enhances 2-nitrobenzene acidity by 10 orders of magnitude. [reaction: see text]
Boiocchi
Massimo
M
Centro Grandi Strumenti, Dipartimento di Chimica Generale, and INSTM, Sezione di Pavia, Università di Pavia, 27100 Pavia, Italy.
Fabbrizzi
Luigi
L
Foti
Francesco
F
Monzani
Enrico
E
Poggi
Antonio
A