The reactivity of a bis(μ-diphenylphosphido) dicyclopentadienyl dimolybdenum complex with an electron withdrawing ring substituent

Joanne C. Stichbury, Martin J. Mays, John E. Davies, Paul R. Raithby, Gregory P. Shields, Amanda G. Finch

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The synthesis of [(η5-C5H4CO2Me) 2Mo2(CO)6] (1), a bis(cyclopentadienyl) dimolybdenum complex with an electron withdrawing ring substituent, from the reaction of Mo(CO)6 and [Na(C5H4CO2Me)] is described. Complex 1 reacts thermally with P2Ph4 to form the bis(μ-diphenylphosphido) complex [(η5-C5H4CO2Me) 2Mo2(μ-PPh2)2(CO)2] (2). Air oxidation of 2 gives trans-[(η5-C5H4CO2Me) 2Mo2(μ-PPh2)2(O)(CO)] (3a) and the corresponding cis-isomer 3b. The reactions of 3a and of the corresponding unsubstituted cyclopentadienyl complex [(η5-C5H5)2Mo 2(μ-PPh2)2(O)(CO)] (4) with [NO][BF4], which yield respectively the nitrosyl substituted dimolybdenum complexes [(η5-C5H4CO2Me) 2Mo2(μ-PPh2)2(O)(NO)][BF 4] (5) and [(η5-C5H5)2Mo 2(μ-PPh2)2(O)(NO)][BF4] (6), are described. Single crystal X-ray diffraction was used to determine the molecular structures of 1 (which crystallises in the monoclinic space group P21/c with a=9.811 (4), b=12.109 (2), c=9.919 (3) Å, β=110.00 (3)° and Z=2), 2 (which crystallises in the triclinic space group P1̄, a=13.364 (4), b=14.535 (4), c=10.576 (2) Å, α=91.33 (2), β=94.94 (2) γ=108.92 (2)° and Z=2) and 3a (which crystallises in the monoclinic space group P21/c with a=12.436 (2), b=15.300 (3), c=20.395 (4) Å, β=111.59 (3)° and Z=4).

Original languageEnglish
Pages (from-to)9-20
Number of pages12
JournalInorganica Chimica Acta
Issue number1
Publication statusPublished - 30 Sep 1997


  • Crystal structures
  • Dinuclear complexes
  • Molybdenum complexes
  • Nitrosyl complexes
  • Oxo complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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