Options
Mono and dinuclear iridium, rhodium and ruthenium complexes containing chelating carboxylato pyrazine ligands: Synthesis, molecular structure and electrochemistry
Auteur(s)
Govindaswamy, Padavattan
Stepnicka, Petr
Ludvik, Jiri
Date de parution
2007
In
J. Organomet. Chem.
Vol.
8
No
692
De la page
1661
A la page
1671
Mots-clés
Résumé
Mononuclear complexes [(?5-C5Me5)IrCl(L1)] (1), [(?5-C5Me5)RhCl(L1)] (2), [(?6-p-PriC6H4Me)RuCl(L1)] (3) and [(?6-C6Me6)RuCl(L1)] (4) have been synthesized from pyrazine-2-carboxylic acid (HL1) and the corresponding complexes [{(?5-C5Me5)IrCl2}2], [{(?5-C5Me5)RhCl2}2], [{(?6-p-PriC6H4Me)RuCl2}2], and [{(?6-C6Me6)RuCl2}2], resp. Related dinuclear complexes [{(?5-C5Me5)IrCl}2(?-L2)] (5), [{(?5-C5Me5)RhCl}2(?-L2)] (6), [{(?6-p-PriC6H4Me)RuCl}2(?-L2)] (7) and [{(?6-C6Me6)RuCl}2(?-L2)] (8) have been obtained in a similar manner from pyrazine-2,5-dicarboxylic acid (H2L2). Compds. isomeric to the latter series, [{(?5-C5Me5)IrCl}2(?-L3)] (9), [{(?5-C5Me5)RhCl}2(?-L3)] (10), [{(p-PriC6H4Me)RuCl}2(?-L3)] (11) and [{(?6-C6Me6)RuCl}2(?-L3)] (12), have been prepd. by using pyrazine-2,3-dicarboxylic acid (H2L3) instead of H2L2. The mol. structures of 2 and 3, detd. by x-ray diffraction anal., show the pyrazine-2-carboxylato moiety to act as an N,O-chelating ligand, while the structure analyses of 5-7, confirm that the pyrazine-2,5-dicarboxylato unit bridges two metal centers. The electrochem. behavior of selected representatives has been studied by voltammetric techniques. [on SciFinder(R)]
Identifiants
Type de publication
journal article
