| Autor: |
Vanesa García-Pacios, Marta Arroyo, Noelia Antón, Daniel Miguel, Fernando Villafañe |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; Mar2009, Vol. 2009 Issue 12, p2135-2141, 7p |
| Abstrakt: |
The reaction of AgBF4with two equivalents of pzH (pyrazole) or dmpzH (3,5-dimethylpyrazole) leads to [Ag(pzH)2]BF4or [Ag(dmpzH)2]BF4. The reaction of [AuCl(tht)] with an equimolar amount of dmpzH in refluxing hexane leads to [Au(dmpzH)2][AuCl2]. Similar complexes [Au(dmpzH)2]A (A = BF4or NO3) are obtained from [AuCl(tht)], two equivalents of dmpzH, and AgBF4or AgNO3. The complexes [Ag(dmpzH)2]BF4and [Au(dmpzH)2]A (A = [AuCl2], BF4or NO3) crystallize as ionic pairs where the NH groups of the pyrazoles are involved in short cation–anion interactions. The nitrate complex crystallizes as a dimer, where both molecules are supported by π-stacking interactions between the pyrazole rings. The crystal structure of [Ag(pzH)2]BF4reveals a three dimensional array of cations and anions. In solution, [Ag(pzH)2]BF4and [Ag(dmpzH)2]BF4undergo intermolecular processes involving pyrazole decoordination, and behave as 1/1 electrolytes; whereas dimethylpyrazole gold complexes do not display any dynamic behavior, and show cation–anion association also in solution. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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