D. Evans, J. Parr, Chih Y. Wong
1992
Citations
0
Influential Citations
10
Citations
Journal
Polyhedron
Abstract
Abstract Quantitative data for the reaction: 3LH+Si(OH) 4 +H + →2 [SiL 3 ] + +4H 2 O in aqueous solution have been obtained by 1 H NMR spectroscopy, where LH tropolone, 4-methyltropolone, 3-hydroxy-2-methylpyridin-4-one, 1,2-dimethyl-3-hydroxypyridine-4-one and 1-ethyl-3-hydroxy-2-methylpyridin-4-one. Equilibrium studies were carried out in D 2 O solutions for both types of complex. The measurements for the complexes derived from 3-hydroxypyridin-4-ones were repeated in H 2 O and the results are compared with the D 2 O data. We present the first air-stable organic substrate capable of etching glass at a significant rate in non-fluorinated acidic solution. The dissolution of silica was confirmed by the detection of the 29 Si NMR resonance characteristic of the six-coordinate silicon(IV) complex formed. Information has been obtained on the rate of dissolution of glass by 1-ethyl-3-hydroxy-2-methylpyridin-4-one in acid solution.