Mono and dinuclear complexes of half-sandwich platinum group metals (Ru, Rh and Ir) bearing a flexible pyridyl-thiazole multidentate donor ligand |
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| Authors: | Kota Thirumala Prasad Kollipara Mohan Rao |
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| Institution: | a Department of Chemistry, North Eastern Hill University, Shillong 793 022, India
b Service Analytique Facultaire, University of Neuchatel, Case Postale 158, CH-2009 Neuchatel, Switzerland |
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| Abstract: | The mononuclear cationic complexes (η6-C6H6)RuCl(L)]+ (1), (η6-p-iPrC6H4Me)RuCl(L)]+ (2), (η5-C5H5)Ru(PPh3)(L)]+ (3), (η5-C5Me5)Ru(PPh3)(L)]+ (4), (η5-C5Me5)RhCl(L)]+ (5), (η5-C5Me5)IrCl(L)]+ (6) as well as the dinuclear dicationic complexes {(η6-C6H6)RuCl}2(L)]2+ (7), {(η6-p-iPrC6H4Me)RuCl}2(L)]2+ (8), {(η5-C5H5)Ru(PPh3)}2(L)]2+ (9), {(η5-C5Me5)Ru(PPh3)}2(L)]2+ (10), {(η5-C5Me5)RhCl}2(L)]2+ (11) and {(η5-C5Me5)IrCl}2(L)]2+ (12) have been synthesized from 4,4′-bis(2-pyridyl-4-thiazole) (L) and the corresponding complexes (η6-C6H6)Ru(μ-Cl)Cl]2, (η6-p-iPrC6H4Me)Ru(μ-Cl)Cl]2, (η5-C5H5)Ru(PPh3)2Cl)], (η5-C5Me5)Ru(PPh3)2Cl], (η5-C5Me5)Rh(μ-Cl)Cl]2 and (η5-C5Me5)Ir(μ-Cl)Cl]2, respectively. All complexes were isolated as hexafluorophosphate salts and characterized by IR, NMR, mass spectrometry and UV-vis spectroscopy. The X-ray crystal structure analyses of 3]PF6, 5]PF6, 8](PF6)2 and 12](PF6)2 reveal a typical piano-stool geometry around the metal centers with a five-membered metallo-cycle in which 4,4′-bis(2-pyridyl-4-thiazole) acts as a N,N′-chelating ligand. |
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| Keywords: | Arene-ligands Mono and dinuclear complexes Pyridylthiazoles Ruthenium Rhodium Iridium |
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