doi:10.1021/om900442mengEsteruelas, Miguel A.Fernández, IsraelFuertes, SaraLópez, Ana M.Oñate, EnriqueSierra, Miguel A.Aromatization of a Dihydro-3-ruthenaindolizine ComplexART-2009-64542The complex RuHCl(η2-H2)(PiPr3)2 (1) reacts with KTp (Tp = hydridotris(pyrazolyl)borate) to give the hydride−dihydrogen derivative RuHTp(η2-H2)(PiPr3) (2), which has been characterized by X-ray diffraction analysis (dH−H = 1.00(3) Å). Treatment of a toluene solution of 2 with 2-vinylpyridine leads to the 1,2-dihydro-3-ruthenaindolizine derivative tiebar above startRu(CH2CH2−C5H4tiebar above endN)Tp(PiPr3) (3). Complex 3 aromatizes in toluene at 80 °C to afford the 3-ruthenaindolizine complex tiebar above startRu(CHCH−C5H4tiebar above endN)Tp(PiPr3) (4) by loss of a hydrogen molecule in the absence of any hydrogen acceptor. The aromatic character of 4 is supported by X-ray diffraction analysis, NMR spectroscopy, and DFT calculations.2009http://zaguan.unizar.es/record/13113310.1021/om900442mhttp://zaguan.unizar.es/record/131133oai:zaguan.unizar.es:131133info:eu-repo/grantAgreement/ES/DGA/E35info:eu-repo/grantAgreement/ES/MICINN/CSD2007-00006info:eu-repo/grantAgreement/ES/MICINN/CTQ2008-00810Organometallics 28, 16 (2009), 4876-4879All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess