Conclusions
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1.
A study has been made of the reaction of hydrogen isotope exchange in CF3COOD byη 6-C6H6Cr(CO)2(η 2-C4H2O3),η 6-(CH3)3C6H3Cr(CO)2(η 3-C4H2O3), andη 6-C6H6Cr(CO)3, at 70°C. It has been found that the maleic anhydride does not have any great effect on the reactivity of theη 6-areae ligand in theη 6-C6H6Cr(CO)2 (η 2-C4H2O3) andη 6-(CH3)3C6H3Cr(CO)2(η 2-C4H2O3) in comparison with the CO ligand inη 6-C6H6Cr(CO)3
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2.
On the basis of IR spectra and1H and13C NMR spectra, it has been established that in acidic media, protonation takes place at the carbonyl groups of the maleic anhydride of the complexesη 6-ArCr(CO)2(η 2-C4H2O3).
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3.
A new complex,η 6-C6H5COOCH3Cr(CO)2 (η 2-C4H2O3), has been synthesized and characterized by its spectra.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 787–791, April, 1984.
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Losilkina, V.I., Petrovskii, P.V., Baranetskaya, N.K. et al. Isotope exchange of hydrogen and protonation of complexes η6-ArCr (CO)2 (η2-C4H2O3). Russ Chem Bull 33, 723–726 (1984). https://doi.org/10.1007/BF00947821
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DOI: https://doi.org/10.1007/BF00947821