Preparation and Structural Characterization of [(Ph3P)2N][HFeRu3(CO)13] and [(Ph3P)2N][HFe2Ru2(CO)13]

F. Takusagawa, A. Fumagalli, T. F. Koetzle, G. R. Steinmetz, R. P. Rosen, W. L. Gladfelter, G. L. Geoffroy, M. A. Bruck, R. Bau

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Reaction of [(Ph3P)2N][HFe(CO)4] with Ru3(CO)12 and Fe2Ru(CO)12 in refluxing THF gives the new clusters [(Ph3P)2N] [HFeRu3(CO)13] and [(Ph3P)2N][HFe2Ru2(CO)13] in 47% and 4% yields, respectively. [(Ph3P)2N]-[HFeRu3(CO)13] has been characterized by its spectroscopic properties and by complete single-crystal X-ray and neutron diffraction studies. [(Ph3P)2N][HFeRu3(CO)13] crystallizes in the space group PI with Z = 2. Unit cell dimensions from the neutron diffraction study at 15 K are a = 15.053 (2) Å, b = 9.073 (1) Å, c = 18.992 (3) Å, α = 104.75 (2)°, β = 109.58 (2)6, and = 86.95 (2)°. The structure was refined to RiF2) = 0.052 and P(wP2) = 0.057 with measured intensities of 8354 independent reflections. The [HFeRu3(CO)13]- anion has a closed pseudotetrahedral structure with each Ru bearing three terminal carbonyls. Two terminal carbonyls are attached to Fe with two additional carbonyls occupying semibridging positions between Fe and two Ru atoms. The hydride ligand symmetrically bridges one of the Ru-Ru bonds. [(Ph3P)2N] [HFe2Ru2(CO)13] has also been characterized crystallographically. It crystallizes in the space group PI with Z = 2. The unit cell dimensions at room temperature are a = 14.955 (2) Å, b= 18.144 (3) Å, c = 9.290 (2) Å, α = 101.54 (2)°, β = 95.03 (4)°, and = 84.04 (3)°. The structure was solved and refined to P(P) = 0.056 and P(wF) = 0.042 for 5886 independent reflections with I ≥ 3.0σ(I). The structure of [HFe2Ru2(CO)13]- is similar to that of [HFeRu3(CO)13]- except that the anion possesses a full-bridging CO between the two Fe atoms and no semibridging CO's.

Original languageEnglish (US)
Pages (from-to)3823-3828
Number of pages6
JournalInorganic chemistry
Issue number11
StatePublished - Nov 1981


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