Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume 2014, Issue 14, Pages 2389-2395Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201400040
Keywords
Kinetics; Reaction mechanisms; Boronic acids; Boronates; Boron
Categories
Funding
- Japan Society for the Promotion of Science (JSPS KAKENHI) [25410150]
- Waseda University [2009B-123, 2011B-179, 2012B-153]
- Grants-in-Aid for Scientific Research [25810052, 25410150, 25288027] Funding Source: KAKEN
Ask authors/readers for more resources
The following reaction systems, with and without proton ambiguity, were set up for direct measurements of the rate constants of borate and boronate ions: boric acid [B(OH)(3)] and 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt (Tiron); 3-nitrophenylboronic acid [3-NO2PhB(OH)(2)] and Tiron; phenylboronic acid [PhB(OH)(2)] and 4-nitrocatechol; boric acid and 4-nitrocatechol. Each rate constant for boric or boronic acid is larger than that for the conjugate borate or boronate ion for the reaction systems without proton ambiguity. These results explicitly indicate that the widespread belief that the rate constants of boronate ions are several orders of magnitude larger than those of the conjugate boronic acids is erroneous. The relative kinetic reactivities of RB(OH)(2) and RB(OH)(3)(-) were investigated in relation to the linear free energy relationships between the rate constants and acidities of the boronic acids and diols.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available