Concepedia

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First example of cyclodimerisation of a phospha-alkyne to a 1,3-diphosphacyclobutadiene. Syntheses of complexes of the type [M(η<sup>5</sup>-C<sub>5</sub>R<sub>5</sub>){η<sup>4</sup>-(Bu<sup>t</sup>CP)<sub>2</sub>}] R = H or Me; M = Co, Rh, or Ir): crystal and molecular structure of η<sup>5</sup>-pentamethylcyclopentadienyl-2,4-di-t-butyl-1,3-diphosphacyclobutadienecobalt(<scp>I</scp>), [Co(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>){η<sup>4</sup>-(Bu<sup>t</sup>CP)<sub>2</sub>}]

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Citations

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References

1986

Year

Abstract

Displacement of ethylene from [M(η5-C5R5)(C2H4)2], (R = H, M = Co or Rh; R = Me, M = Co, Rh, or Ir) by treatment with ButCP affords complexes containing the novel 2,4-di-t-butyl-1,3-diphosphacyclobutadiene ring.