Sterically controlled esterification on Bis(mu-hydroxo) dioxovanadium site in gamma-H2SiV2W10O40(4-).
The esterification of a bis(mu-hydroxo) dioxovanadium site in divanadium-substituted silicotungstate, gamma-H(2)SiV(2)W(10)O(40)(4)(-), with alcohols is sterically controlled: The secondary and tertiary alcohol esters are hardly formed (equilibrium constant < 0.01), and a large equilibrium constant of 75 is observed for the reaction with methanol.
Nakagawa
Yoshinao
Y
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Uehara
Kazuhiro
K
Mizuno
Noritaka
N