Sponsor
Portland State University. Department of Chemistry
First Advisor
Raymond P. Lutz
Term of Graduation
Winter 1972
Date of Publication
1-25-1972
Document Type
Thesis
Degree Name
Master of Arts (M.A.) in Chemistry
Department
Chemistry
Language
English
Subjects
Silicate minerals
DOI
10.15760/etd.970
Physical Description
1 online resource (vi, 70 pages)
Abstract
The chemical properties of guanidinium tris(catecholato)siliconate, [(H₂N)₂C=NH₂]₂[Si(C₆H₄O₂)₃]·XH₂O (0 < X < 1), precipitated from an ammoniacal solution of silica and catechol by adding guanidinium hydrochloride, (H₂N)₂C=NH·HC1, were studied, and infrared, nmr, x-ray powder diffraction, and analytical data were gathered.
This same compound was, upon addition of' (H₂N)₂C=NH·HC1, isolated from 0.25, M aqueous catechol solutions buffered at pH 10 and containing the silicate minerals albite, andradite, muscovite, pyrophyllite, talc, and wollastonite, and also from unbuffered catechol solutions containing wollastonite and andradite.
It is concluded from this work that the formation of an anionic catechol-silicon complex, Si(C₆H₄O₂)₃²⁻, is largely responsible for the dissolution of the minerals mentioned above. From this conclusion, it is proposed that naturally occurring members of the class of organic compounds to which catechol belongs, the aromatic v̲i̲̲c̲-diols, may play a role in chemical weathering, in the development of certain soil profiles, and in the entry and accumulation of silica in plants.
Rights
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Persistent Identifier
http://archives.pdx.edu/ds/psu/9777
Recommended Citation
Kelley, James Maurice, "Catechol Effected Dissolution of Silicate Minerals" (1972). Dissertations and Theses. Paper 970.
https://doi.org/10.15760/etd.970
Comments
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