In:
Beilstein Journal of Organic Chemistry, Beilstein Institut, Vol. 11 ( 2015-09-30), p. 1786-1795
Abstract:
Ruthenium complexes [Ru(L1) 2 (CH 3 CN) 2 ](PF 6 ) 2 ( 1 ), [RuL1(CH 3 CN) 4 ](PF 6 ) 2 ( 2 ) and [RuL2(CH 3 CN) 3 ](PF 6 ) 2 ( 3 ) (L1= 3-methyl-1-(pyrimidine-2-yl)imidazolylidene, L2 = 1,3-bis(pyridin-2-ylmethyl)benzimidazolylidene) were obtained through a transmetallation reaction of the corresponding nickel–NHC complexes with [Ru( p -cymene) 2 Cl 2 ] 2 in refluxing acetonitrile solution. The crystal structures of three complexes determined by X-ray analyses show that the central Ru(II) atoms are coordinated by pyrimidine- or pyridine-functionalized N-heterocyclic carbene and acetonitrile ligands displaying the typical octahedral geometry. The reaction of [RuL1(CH 3 CN) 4 ](PF 6 ) 2 with triphenylphosphine and 1,10-phenanthroline resulted in the substitution of one and two coordinated acetonitrile ligands and afforded [RuL1(PPh 3 )(CH 3 CN) 3 ](PF 6 ) 2 ( 4 ) and [RuL1(phen)(CH 3 CN) 2 ](PF 6 ) 2 ( 5 ), respectively. The molecular structures of the complexes 4 and 5 were also studied by X-ray diffraction analysis. These ruthenium complexes have proven to be efficient catalysts for transfer hydrogenation of various ketones.
Type of Medium:
Online Resource
ISSN:
1860-5397
Language:
English
Publisher:
Beilstein Institut
Publication Date:
2015
detail.hit.zdb_id:
2192461-2
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