Synthesis and Characterization of New Molybdenum(VI) Oxalate Complexes. Crystal Structure of Tetramethylammonium Salt of m-Oxo-diaquadioxalatotetraoxodimolybdenum(VI)

Cindrić, Marina and Strukan, Neven and Vrdoljak, Višnja (1999) Synthesis and Characterization of New Molybdenum(VI) Oxalate Complexes. Crystal Structure of Tetramethylammonium Salt of m-Oxo-diaquadioxalatotetraoxodimolybdenum(VI). Croatica Chemica Acta, 72 (2-3). pp. 501-509. ISSN 0011-1643

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Abstract

In the reaction of molybdenum(VI) oxide with oxalic acid and RCl (R = pyH and γ-picH), new dinuclear complexes of molybdenum(VI) R2[Mo2O5(C2O4)2(H2O)2] have been prepared. When molybdenum(VI) oxide was treated with aqueous solution of tetramethylammonium oxalate complex, [(CH3)4N] 2[MoO3(C2O4)] H2O was isolated. The unknown crystal structure of [(CH3)4N]2[Mo2O5(C2O4)2(H2O)2] was determined from single crystal diffractometer data and refined to the final R value of 0.0317. When irradiated, this class of compounds shows considerable photochromic properties. The hotochemical process is of the redox type: molybdenum(VI) centers are reduced to molybdenum(V) moieties. The presence of molybdenum(V) species was confirmed by the ESR spectra.

Item Type: Article
Keywords: molybdenum(VI) complexes; oxalate complexes; photochemical behaviour; crystal structure
Date: 1999
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Faculty of Science > Department of Chemistry
Publisher: Hrvatsko kemijsko društvo
Related URLs:
Depositing User: mag. bibl. Ana Šafran
Date Deposited: 27 May 2014 13:06
Last Modified: 27 May 2014 13:06
URI: http://digre.pmf.unizg.hr/id/eprint/1804

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