Crystal Structure of the Axial (Orange-Yellow) Isomer of Bis(methyldiphenylphosphine)tetrakis(trifluoroacetato)dimolybdenum

Gregory S Girolami, Richard A. Andersen

Research output: Contribution to journalArticlepeer-review


The X-ray crystal structure of the orange-yellow isomer of Mo2(O2CCF3)4(PMePh2)2 confirms that it possesses a class I (axial) structure as previously deduced spectroscopically. Accordingly, PMePh2 is capable of forming both class I and class II (equatorial) adducts with Mo2(O2CCF3)4. NMR studies show that an equilibrium between the two isomers is established in solution. Crystal data: space group P21/c; a = 9.923 (1) Å, b = 22.517 (2) Å, c = 18.735 (3) Å, β = 99.18 (1)°; V= 4132 (2) Å3; Z = 4; R = 4.43%, Rw = 6.63%; Mo-Mo = 2.128 (1) Å, Mo-P = 2.988 ± 0.024 Å, Mo-Mo-P = 166.15 ± 0.16°.

Original languageEnglish (US)
Pages (from-to)1318-1321
Number of pages4
JournalInorganic Chemistry
Issue number4
StatePublished - 1982
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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