Date of Award

1972

Document Type

Thesis

Degree Name

Master of Arts (M.A.) in Chemistry

Department

Chemistry

Physical Description

1 online resource (2, v, 70 leaves, ill. 28 cm.)

Subjects

Silicate minerals, Catechol

DOI

10.15760/etd.970

Abstract

The chemical properties of guanidinium tris(catecholato)siliconate, (H2N)2C=NH2J2(Si(C6H402)j]-XH20 (0

This same compound was, upon addition of' (H2N)2C=NH.HC1, isolated from 0.2, 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(C6H402)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 vic-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.

Description

Portland State University. Department of Chemistry

Persistent Identifier

http://archives.pdx.edu/ds/psu/9777

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