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Preparation, structural characterization, and decomposition studies of two new γ-octamolybdates of 4-methylpyridine.
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ABSTRACT: Abstract
We synthesized two new γ-octamolybdates, and determined their crystal structures from single-crystal X-ray diffraction data. Orange-yellow tetrakis(4-methylpyridinium) bis(4-methylpyridine)-γ-octamolybdate 1 crystallizes in space group P21/c with a = 11.586(2) Å, b = 15.526(2) Å, c = 16.247(2) Å, β = 118.753(1)º, Z = 2. White tetrakis(4-methylpyridinium) bis(4-methylpyridine)-γ-octamolybdate hydrate 2 crystallizes in space group C2/c with a = 27.086(4) Å, b = 11.917(2) Å, c = 19.332(2) Å, β = 124.427(1)º, Z = 4. Results of crystal structure determinations are presented and discussed in this paper. Thermal stability and decomposition studies of the obtained two new γ-octamolybdates were performed using TG/DSC and XRPD methods. Both compounds decomposed with the formation of 4-methylpyridinium β-octamolybdate. The two compounds are pseudo-polymorphs, exhibiting both striking similarities as well as significant differences in their structures and properties.Graphical abstract
SUBMITTER: Szymanska A
PROVIDER: S-EPMC4495051 | biostudies-literature | 2014
REPOSITORIES: biostudies-literature
Publications
Preparation, structural characterization, and decomposition studies of two new γ-octamolybdates of 4-methylpyridine.
Monatshefte fur chemie 20140415 6
<h4>Abstract</h4>We synthesized two new γ-octamolybdates, and determined their crystal structures from single-crystal X-ray diffraction data. Orange-yellow tetrakis(4-methylpyridinium) bis(4-methylpyridine)-γ-octamolybdate <b>1</b> crystallizes in space group P2<sub>1</sub>/c with <i>a</i> = 11.586(2) Å, <i>b</i> = 15.526(2) Å, <i>c</i> = 16.247(2) Å, <i>β</i> = 118.753(1)º, <i>Z</i> = 2. White tetrakis(4-methylpyridinium) bis(4-methylpyridine)-γ-octamolybdate hydrate <b>2</b> crystallizes in sp ...[more]