Synthesis and characterization of ruthenium quinolin-8-olate complexes. Unexpected formation of a κ<sup>1</sup>-hydrotris(pyrazolyl)borate complex
Gemel, Christian; John, Roland; Slugovc, Christian; Mereiter, Kurt; Schmid, Roland; Kirchner, Karl; Gemel Christian; Institute of Inorganic Chemistry, Vienna University of Technology; John Roland; Institute of Inorganic Chemistry, Vienna University of Technology; Slugovc Christian; Institute of Inorganic Chemistry, Vienna University of Technology; Mereiter Kurt; Institute of Mineralogy, Crystallography, and Structural Chemistry, Vienna University of Technology; Schmid Roland; Institute of Inorganic Chemistry, Vienna University of Technology; Kirchner Karl; Institute of Inorganic Chemistry, Vienna University of Technology
Журнал:
Dalton Transactions
Дата:
2000
Аннотация:
The complex [Ru(η<sup>6</sup>-p-MeC6H4Pr<sup>i</sup>)Cl2]2 reacted with K[quin] (quinâ =â quinolin-8-olate) to yield the half-sandwich complex Ru(η<sup>6</sup>-p-MeC6H4Pr<sup>i</sup>)(quin)Cl 1. Chloride abstraction from 1 with AgCF3SO3 affords the neutral complex Ru(η<sup>6</sup>-p-MeC6H4Pr<sup>i</sup>)(quin)(κ<sup>1</sup>O-CF3SO3). The lability of the CF3SO3<sup>â </sup> ligand in 2 is apparent by the reaction with CH3CN giving [Ru(η<sup>6</sup>-p-MeC6H4Pr<sup>i</sup>)(quin)(CH3CN)]CF3SO3 3. Refluxing RuTp(COD)Cl in the presence of K[quin] resulted in the formation of Ru(COD)(quin)2 4 containing no Tp ligand; 4 has also been obtained in good yield by treating [Ru(COD)Cl2]n with K[quin] in boiling methanol. Treatment of either 1 or 3 with 1 equivalent of KTp resulted in the formation of the unusual complex Ru(η<sup>6</sup>-p-MeC6H4Pr<sup>i</sup>)(quin)(κ<sup>1</sup>N-Tp) (5) featuring a κ<sup>1</sup>-co-ordinated Tp ligand. However, if 1 is treated with KTp in the presence of AgCF3SO3 the cationic complex [Ru(η<sup>6</sup>-p-MeC6H4Pr<sup>i</sup>)(quin)(κ<sup>1</sup>-Hpz)]CF3SO3 6 is obtained containing a pyrazole ligand as a result of Bâ N bond cleavage. Complexes 1, 4, 5, and 6 have been characterized by X-ray crystallography.
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