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Original Articles

Investigations of Ruthenium (II) Sources for the Synthesis of Ruthenocene and [1.1]Ferro-Ruthenocenophane

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Pages 227-245 | Received 27 Dec 1990, Accepted 30 Oct 1991, Published online: 22 Nov 2011

References

  • Tanner , M. 1981 . “Synthesis and Characterization of [l.l] Metallocenophanes,” unpublished studies from IBM
  • Mueller-Westerhoff , U. T. , Nazzal , A. and Tanner , M. 1981 . J. Organomet. Chem. , 236 : C41
  • Cassens , A. , Eilbracht , P. E. , Nazzal , A. , Proessdorf , W. and Mueller-Westerhoff , U. T. 1981 . J. Am. Chem. Soc , 103 : 6367
  • Fergusson , J. E. , Karran , J. D. and Sevaratnam , S. 1965 . J. Chem. Soc. , : 2627
  • Taqui Khan , W. W. and Mohiuddin , R. 1983 . Tetrahedron , 2 : 1247
  • An infrared spectrum of the blue/green solid indicated that even after evaporation (using a vacuum of 500 millitorr) of all of the solvent, methanol was still present, possibly coordinated to the ruthenium metal. The IR spectrum gave C-OH stretch at 3400 cm−1 and C-O bend at 1275 cm−1. Based on the limited yield of Cp2Ru and the results of this experiment, no attempt to prepare 2 was tried
  • Jones , D. , Pratt , L. and Wilkinson , G. 1964 . J. Chem. Soc. , : 4461
  • The mass spectrum gave a main peak at m/e = 441. An interesting observation was made upon examining the mass spectrum of this compound. The first fragment seen was 56 amu from the main peak. This was assigned to Fe+. Therefore, the Ru must be bound tighter in this structure than the Fe. Lippincott and coworkers12 and Rausch and his research group13 had independently reported that the metal-to-ring bonding in Cp2Ru should be stronger than Cp2Fe. Lippincott compared calculated thermodynamic functions for Cp2Fe and Cp2Ru with other properties (IR) and suggested that the strength of the metal-to-ring bonding in Cp2Ru is greater than in Cp2Fe. Rausch used the analogy that because the electrophilic reactivity of these metallocenes decrease in the order Cp2Fe < Cp2Ru < CP2Os, a tighter metal-to-ring bonding was indicated in the latter derivatives
  • Katz , T. J. , Acton , N. and Martin , G. 1969 . J. Am. Chem. Soc. , 91 : 2804
  • Gubin , S. P. , Simiraniva , S. A. , Denisovich , L. I. and Lubovich , A. A. 1971 . J. Organomet. Chem. , 30 : 243
  • Coleson , K. September 1984 . “Ferrocenophane Analogs,” , September , University of Connecticut . unpublished studies
  • Lippincott , E. R. and Nelson , R. D. 1955 . J. Am. Chem. Soc. , 77 : 4990
  • Rausch , M. D. , Fischer , E. O. and Grubert , H. 1960 . J. Am. Chem. Soc. , 82 : 76
  • Herog , S. , Gustov , K. , Krueger , E. , Oberender , H. and Schuster , R. 1963 . Z. Chem. , 3 : 428
  • Fergusson , J. E. , Karran , J. D. and Seevaratnam , S. 1965 . J. Chem. Soc. , : 2627
  • Wilkinson , G. 1952 . J. Am. Chem. Soc. , 74 : 6146

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