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Thermal Studies of Some Ionic Chelate Complexes of Bis(cyclopentadienyl)hafnium(IV)
Malhotra, E., Kaushik, N. K. and Sodhi, G. S. Thermal Studies of Some Ionic Chelate Complexes of Bis(cyclopentadienyl)hafnium(IV) Chemical Papers, Vol.57, No. 2, 2003, 78-82
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Attached Files |
| Name |
Description |
MIMEType |
Size |
Downloads |
n572a78.pdf
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572a78.pdf |
application/pdf |
166.51KB |
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| Author(s) |
Malhotra, E.
Kaushik, N. K.
Sodhi, G. S.
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| Title |
Thermal Studies of Some Ionic Chelate Complexes of Bis(cyclopentadienyl)hafnium(IV)
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| Journal name |
Chemical Papers
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| Publication date |
2003
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| Year available |
2003
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| Volume number |
57
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| Issue number |
2
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| ISSN |
0366-6352
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| Start page |
78
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| End page |
82
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2003
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| Language |
english
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| Subject |
250000 Chemical Sciences
250300 Organic Chemistry
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| Abstract/Summary |
Bis(cyclopentadienyl)hafnium(IV) complexes of thymine (HL) of the type [(η5-C5H5)2HfL]+X− (X = CuCl3, ZnCl3, CdCl3, HgCl3) have boen svnthesized and characterized by spectral studies (IR, UV, 1H NMR, and 13C NMR). Molar conductivity measurements reveal that the compounds are 1:1 electrolytes. From thermogravimetric curves, the order, apparent activation energy, andapparent activation entropy of the thermal decomposition reaction have been elucidated. The order in each case has been determined to be one and the degree of lability and spontaneity has been inferred from the apparent activation energy and entropy, respectively. The various thermal studieshave been correlated with some structural aspects of the complexes concerned. From differential thermal analytical curves the heat of reaction has been calculated.
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