107883-46-5Relevant academic research and scientific papers
Temperature-dependent elongation of the H–H bond in dihydrogen complexes of Ru(II) bearing an NHC ligand: Effect of the NHC and trans ligands
Mala, Deep,Jagirdar, Balaji R.,Patil, Yogesh P.,Nethaji, Munirathinam
, p. 411 - 424 (2018/09/11)
Ruthenium hydride complexes bearing an N-heterocyclic carbene ligand [RuHCl(CO)(IMes)(PPh3)(L/L′)] (L = py, 2; 4Mepy, 3; L′ = MeCN, 4; Me3CCN, 5) have been synthesized in high-yields via reaction of [RuHCl(CO)(IMes)(PPh3)] (1) with pyridyl ligands L (L = py and 4Mepy) or nitrile ligands L′ (L′ = MeCN and Me3CCN). The ligands L/L′ are labile in all the ruthenium hydride complexes; they can be easily replaced by Lewis bases. The X-ray structures of complexes 2 and 3 show intramolecular π-π interactions between the aromatic ring of PPh3, IMes, and pyridyl ligands. The protonation reaction of 2–5 gives the corresponding dihydrogen complexes of the type [RuCl(η2-H2)(CO)(IMes)(PPh3)(L/L′)][OTf] complexes (L = py, 6; 4Mepy, 7; L′ = MeCN, 8; Me3CCN, 9). In all the dihydrogen complexes, H–H bond distances of η2-H2 ligand is temperature-dependent: 0.98 ? to 0.93 ? in the temperature range of 183–233 K. Attempts to synthesize analogous ruthenium hydride complexes bearing phosphine ligands resulted in a mixture of cis and trans-[RuHCl(CO)(PPh3)2(L)] [L = py, 10/11 (transHCl/cisHCl); 4Mepy, 12/13 (transHCl/cisHCl)] complexes. A comparative study has been done to get an insight into the temperature-dependent H–H bond distances in complexes 6–8 by synthesizing analogous ruthenium dihydrogen complexes, [RuCl(η2-H2)(CO)(PPh3)2(L)](OTf) (L = py, 15; 4Mepy, 17). All the complexes have been characterized using NMR spectroscopy. The X-ray crystal structures of complexes 2, 3, and 12 have also been determined.
Ruthenium(II) Complexes Containing Nitrogen Heterocyclics
Gopinathan, Sarada,Unny, I. R.,Deshpande, S. S.,Gopinathan, C.
, p. 1015 - 1017 (2007/10/02)
Fifteen new complexes of the type RuHClCO(PPh3)2(L) where L is a nitrogen containing heterocyclic base, have been synthesised by the reaction between RuHClCO(PPh3)3 and excess of L.These complexes have been characterised by elemental analyses, IR and 1H NMR spectral data.Our studies reveal the following order of affinities of various ligands for Ru(II): 4-vinylpyridine > 4-picoline > 3-cyanopyridine > 2,2'-bypyridyl ca. 1,10-phenanthroline > benzoquinoline > quinazolines.Ruthenium(II) complexes of pyridine derivatives exist as isomers in which the pyridine base is situated trans to either carbonyl or hydride ligand.
