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Photochemical C-Cl bond activation of trichloroarenes by the rhenium complex (eta(5)-C5Me5)Re(CO)(3). X-ray structure of trans-(eta(5)-C5Me5)Re(CO)(2)(2-methoxy-4,5-dichlorophenyl)chloride

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2003-12-15
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Aballay, Alvaro
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Photochemical C-Cl bond activation of trichloroarenes by the rhenium complex (eta(5)-C5Me5)Re(CO)(3). X-ray structure of trans-(eta(5)-C5Me5)Re(CO)(2)(2-methoxy-4,5-dichlorophenyl)chloride
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Author
  • Aballay, Alvaro;
  • Godoy, Fernando;
  • Buono-Core, Gonzalo E.;
  • Klahn, A. Hugo;
  • Oelckers, Beatriz;
  • Garland, María Teresa;
  • Muñoz, Juan Carlos;
Abstract
Photochemical reaction of (eta(5)-C5Me5)Re(CO)(3), with 2,4,5-trichloroanisole and 3,4,5-trichlorotrifluoromethylbenzene yields (eta(5)- C5Me5)Re(CO)(2)(C6H2Cl2(MeO))Cl (1) and (eta(5)-C5Me5)Re(CO)(2)(C6H2Cl2(CF3))Cl, (2) formed by insertion of the fragment (eta(5)- C5Me5)Re(CO)(2) into the C-Cl bond of the chloroarenes. The C-Cl bond activation of trichloroanisole occurs at the chlorine ortho respect to the methoxy group as revealed by the X-ray structure of 1. In the case of the reaction with C6H2Cl3(CF3), H-1-NMR spectroscopy indicates that only the C-Cl bond meta respect to CF3 group is cleaved. Complex 1 was isolated as the trans isomer while 2 was obtained as an isomeric mixture (trans-2 and cis-2). The stereochemistry of these complexes has been assigned by IR and C-13-NMR spectroscopies and supported by X-ray crystallography for 1.
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URI: https://repositorio.uchile.cl/handle/2250/124634
ISSN: 0022-328X
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JOURNAL OF ORGANOMETALLIC CHEMISTRY 688 (1-2): 168-173 DEC 15 2003
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