Studies on organomercury(II) complexes of maltol.
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概要
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A number of organomercury(II) complexes involving maltol (<B>1</B>) of the type RHgL (<B>2</B>) [R=phenyl (C<SUB>6</SUB>H<SUB>5</SUB>), <I>o</I>-, <I>p</I>-hydroxyphenyl (<I>o</I>-, <I>p</I>-HOC<SUB>6</SUB>H<SUB>4</SUB>), <I>p</I>-acetoxyphenyl (<I>p</I>-AcOC<SUB>6</SUB>H<SUB>4</SUB>), 2-furyl (2-C<SUB>4</SUB>H<SUB>3</SUB>O); HL=maltol] have been synthesized and characterized. Conductance measurements indicate that the complexes are nonelectrolytes. From IR and UV studies, it is concluded that maltol acts as a bidentate ligand, coordinating to the mercury(II) ion through phenolic and carbonyl oxygen atoms. <SUP>1</SUP>H and <SUP>13</SUP>C NMR support the stoichiometry of the complexes. Fluorescence spectra have been recorded for <I>o</I>-, <I>p</I>-HOC<SUB>6</SUB>H<SUB>4</SUB>HgL complexes. For C<SUB>6</SUB>H<SUB>4</SUB>HgL, <I>p</I>-HOC<SUB>6</SUB>H<SUB>4</SUB>HgL, and <I>p</I>-AcOC<SUB>6</SUB>H<SUB>4</SUB>HgL complexes, thermal studies (TG and DSC) have been carried out and relevant kinetic and thermodynamic parameters have been enumerated. In addition, the fragmentation pattern of the complexes has been analyzed on the basis of mass spectra.
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著者
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K. Kaushik
Department of Chemistry, University of Delhi
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Bhatia Sangeeta
Department of Chemistry, University of Delhi
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S. Sodhi
Department of Chemistry, S. G. T. B. Khalsa College, University of Delhi