Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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A Comparison of the Leaving Group Ability of Transition Metal Carbonyl Anions vs. Halides : Reaction of $MH^-$ with M'-R $(MH^-\;=\;HW(CO)_4\;-P(OMe)_3\;^-,\;HW(CO)_5\;^-,\;HCr(CO)_5\;^-,\;HFe(CO)_4\;^-;\;M'-R=CpMo(CO)_3(CH_3),\;CpMo(CO)_3{CH_2CH(CH_2)_2})$

  • Yong Kwang Park (Department of Chemistry, Kangweon National University) ;
  • Seon Joong Kim (Department of Chemistry, Kangweon National University) ;
  • Carlton Ash (Department of Chemistry, Texas A&M University College Station)
  • Published : 1990.04.20
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Abstract

The anionic transition metal hydrides $(HW(CO)_4P(OMe)_3\;^-,\;HW(CO)_5\;^-,\;HCr(CO)_5\;^-,\;HFe(CO)_4\;^-)$ react with transition metal alkyl $(CpMo(CO)_3(CH_3)$ to yield $CH_4\;and\;CH_3CHO$ in addition to the inorganic products $(CpMo(Co)_3\;^-$, etc.). The reaction of these anionic metal hydrides with CpMo(CO)3{CH2CH(CH2)2} may lead to an elucidation of the reaction mechanisms involved; the organic product distributions are among $CH_4,\;CH_2\;=\;CHCH_2CH_3$, and $CH_3CH(CH_2)_2$, depending upon the anionic metal hydride used. These anionic metal hydrides also are reported to undergo a hydride-halide exchange reaction with organic halides; therefore, these similar reactions have been compared in terms of leaving group ability $(CpMo(CO)_3\;^-\;vs.\;Br^-)$ and the mechanistic pathways.

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References

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