Conclusions
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1.
The reaction ofσ-thenoyl-η 5 cyclopentadienyldicarbonyliron with acetylenes may proceed by three different pathways depending on the acetylene structure: 1) formation of indenone heteroanalogs due to cyclization of theσ-ligand and acetylene (tolane, 1-triphenylgermyl-2-phenylacetylene), 2) replacement of a carbonyl group by an n-donor ligand in the case of an n-donor atom in the acetylene (2-phenylethynyldiphenylphosphine), and 3) formation of aπ-acetylenic complex (dicarbomethoxyacetylene).
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2.
X-ray diffraction structural analysis showed that the product of the reaction ofσ-thenoyl-η 5-cyclopentadienyldicarbonyliron with 1-triphenylgermyl-2-phenylacetylene is 5-triphenylgermyl-6-phenyl-4H-cyclopenta[b] thiophe-4-one.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1162–1170, May, 1983.
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Goncharenko, L.V., Kolobova, N.E., Kuz'mina, L.G. et al. Reaction of heterocyclic σ-derivatives of η5-cyclopentadienyldicarbonyliron with acetylenes and the crystalline and molecular structure of 5-triphenylgermyl-6-phenyl-4h-cyclopenta[b]-thiophen-4-one. Russ Chem Bull 32, 1049–1056 (1983). https://doi.org/10.1007/BF00956167
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DOI: https://doi.org/10.1007/BF00956167