Novel polypyridyl ruthenium(II) complexes containing oxalamidines as ligands

Content Provider	Semantic Scholar
Author	Ruben, Mario Rau, Sven Skirl, A. Krause, Katrin Görls, Helmar Walther, Dirk Vos, Johannes G.
Copyright Year	2000
Abstract	Abstract The complexes [Ru(bpy) 2 (H 2 TPOA)](PF 6 ) 2 ·4H 2 O ( 1 ); [Ru(Me-bpy) 2 (H 2 TPOA)](PF 6 ) 2 ·2H 2 O ( 2 ); [Ru(bpy) 2 (H 2 TTOA)](PF 6 ) 2 ·2H 2 O ( 3 ); [Ru(Me-bpy) 2 (H 2 TTOA)](PF 6 ) 2 ·2H 2 O ( 4 ) and {[Ru(bpy) 2 ] 2 (TPOA)}(PF 6 ) 2 ·2H 2 O ( 5 ) (where bpy is 2,2′-bipyridine; Me-bpy is 4,4′-dimethyl-2,2′-bipyridine; H 2 TPOA is N , N ′, N ′′, N ′′′-tetraphenyloxalamidine; H 2 TTOA is N , N ′, N ′′, N ′′′-tetratolyloxalamidine) have been synthesised and characterised by 1 H NMR, FAB MS, infrared spectroscopy and elemental analysis. The X-ray investigation shows the coordination of the still protonated oxalamidine moiety via the 1,2-diimine unit. The dimeric compound ( 5 ) could be separated in its diastereoisomers ( 5′ ) and ( 5′′ ) by repeated recrystallisation. The diastereomeric forms exhibit different 1 H NMR spectra and slightly shifted electronic spectra. Compared with the model compound [Ru(bpy) 3 ] 2+ , the absorption maxima of ( 1 )–( 5 ) are shifted to lower energies. The mononuclear complexes show Ru(III/II)-couples at about 0.9 V versus SCE, while for the dinuclear complex two well defined metal based redox couples are observed at 0.45 and 0.65 V, indicating substantial interaction between the two metal centres.
Starting Page	206
Ending Page	214
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1016/S0020-1693(00)00035-9
Volume Number	303
Alternate Webpage(s)	http://www.ruben-group.de/lit/2000_9_novel_polypyridyl.pdf
Alternate Webpage(s)	http://doras.dcu.ie/33/1/Novel_polyridyl_ruthenium_-_Inorganica_Chimica_Acta.pdf
Alternate Webpage(s)	https://doi.org/10.1016/S0020-1693%2800%2900035-9
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article