Preparation and reactivity of cis-bis(cyclopentadienyldiphenylphosphine) (tetracarbonyl)molybdenum and cis-[1,3-bis(diphenylphosphino)dicyclopentadiene] (tetracarbonyl)molybdenum. X-ray crystal structure of 2[(C5H5)Mo]2(μ-PPh2) 2(CO)(O)·C6H14

Rick W K WONG*, Fong Lung Chow, Hua Chen, Ru Ji Wang, Thomas C.W. Mak

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The interaction of C7H8Mo(CO)4 with 2 equivalents of Ph2P(C5H5) in hexane at -2°C gives two isomers of cis-[Ph2P(C5H5)]2Mo(CO)4 (II and III) in high yield. In toluene, the coordinated Ph2P(C5H5) ligands of II and III undergo intramolecular Diels-Alder dimerization at room temperature producing cis-[1,3-bis(diphenylphosphino) dicyclopentadiene](tetracarbonyl)molybdenum (IV) in quantitative yield. Compound IV can also be prepared in high yield by the interaction of cis-Mo(CO)4(Ph2PCl)2 with 2 equivalents of (C5H5)Tl in refluxing toluene. Pyrolysis of IV gives a hexane solvate 2[(C5H5)Mo]2(μ-PPh2) 2(CO)(O)·C6H14 (VI) in low yield, the structure of which was determined by X-ray crystallography.

Original languageEnglish
Pages (from-to)2469-2476
Number of pages8
JournalPolyhedron
Volume9
Issue number20
DOIs
Publication statusPublished - 1990

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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