β-Diketones derived from cyclopentadienyl rhenium tricarbonyl

Teresa Cautivo, Fernando Godoy, A. Hugo Klahn, Gonzalo E. Buono-Core, Diego Sierra, Mauricio Fuentealba, M. Teresa Garland

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The acetyl complex (η5-C5H4COCH3)Re(CO)3 reacts with KOtBu and an excess of appropriate ester to provide cyrhetrenyl-β-diketones complexes (η5-C5H4COCH2COR)Re(CO)3 (R = CF3, 1a; CH3, 1b; Ph, 1c). These new 1,3-diketones exist predominantly as enol tautomer, although a enol/keto mixture of approx. 10:1 is present in complexes 1b-c, in chloroform-d solution. The complexes have been characterized by spectroscopic techniques IR, 1H and 13C NMR and mass spectrometry. X-ray crystallography of complex 1b shows that only the enol form occurs in the solid state. The O-C-C-C-O fragment of the molecule is planar with asymmetric enolisation in the direction furthest from the cyrhetrenyl group.

Original languageEnglish
Pages (from-to)1031-1034
Number of pages4
JournalInorganic Chemistry Communications
Volume10
Issue number9
DOIs
StatePublished - Sep 2007
Externally publishedYes

Keywords

  • Cyrhetrenyl-1,3-diketone
  • Organometallic ligand
  • Rhenium

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