[Ru4(CO)7(μ-CO)225η2-indenyl)(η5-dihydroindenyl)]: A novel planar cluster with a three-way bridging indenyl ligand

Amihai Eisenstadt, Felix Frolow, Avi Efraty

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Abstract

The novel tetranuclear planar cluster [Ru4(CO)7(μ-CO)2252-indenyl)(η5-dihydroindenyl)] was prepared by the reaction of indene with Ru3(CO)12 and its structure determined by a single crystal X-ray diffraction study.

Original languageEnglish
Pages (from-to)642-643
Number of pages2
JournalChemical Communications
Issue number11
DOIs
StatePublished - 1982
Externally publishedYes

Bibliographical note

Funding Information:
Bond distances and angles observed for the indenyl and dihydroindenyl ligands in (2)are quite similar to those reported for bis(~~-indenyl)ruthenium.~The presence of q5-indenyl instead of q5-dihydroindenyl in some of the clusters could explain the greater disorder [rather large, anisotropic tem- perature factors of C(25)-C(28)] observed in the data of the latter ligand. The formation of (2) is also of interest from the standpoint of the chemistry of clusters. The presence of a three-way bridging indenyl in hydrido-containing cluster intermediates suggests intramolecular hydrogen transfer processes during the formation of the q6-dihydroindenyl ligand in (2). More-over, the presence of the [R~(CO),(~~-dihydroindenyl)]unit in (2) suggests the possible role of cluster-extended inter- mediates during the formation of dinuclear products [e.g., (l)] from Ru,(CO),,. This research programme was supported by a grant received from the U.S.A.-Israel Binational Science Founda- tion (B.S.F.). Received, 1Ith March 1982; Corn. 281 References 1 P. McArdle and A. R. Manning, J. Chem. SOC.A, 1970, 2128. 2 M. R. Churchill and R. Bau, Inorg. Chem., 1968, 7, 2606. 3 'Transition Metal Clusters,' ed. B. F. G. Johnson, Wiley,London, 1980. 4 R. Mason and A. 1. M. Rae, J. Chem. SOC.A, 1968, 778. 5 0. S. Mills and J. P. Nice, J. Organomet. Chem., 1967, 9, 339. 6 N. C. Webb and R. E. Marsh, Acta Crystallogr., 1967, 22, 382.

Funding

Bond distances and angles observed for the indenyl and dihydroindenyl ligands in (2)are quite similar to those reported for bis(~~-indenyl)ruthenium.~The presence of q5-indenyl instead of q5-dihydroindenyl in some of the clusters could explain the greater disorder [rather large, anisotropic tem- perature factors of C(25)-C(28)] observed in the data of the latter ligand. The formation of (2) is also of interest from the standpoint of the chemistry of clusters. The presence of a three-way bridging indenyl in hydrido-containing cluster intermediates suggests intramolecular hydrogen transfer processes during the formation of the q6-dihydroindenyl ligand in (2). More-over, the presence of the [R~(CO),(~~-dihydroindenyl)]unit in (2) suggests the possible role of cluster-extended inter- mediates during the formation of dinuclear products [e.g., (l)] from Ru,(CO),,. This research programme was supported by a grant received from the U.S.A.-Israel Binational Science Founda- tion (B.S.F.). Received, 1Ith March 1982; Corn. 281 References 1 P. McArdle and A. R. Manning, J. Chem. SOC.A, 1970, 2128. 2 M. R. Churchill and R. Bau, Inorg. Chem., 1968, 7, 2606. 3 'Transition Metal Clusters,' ed. B. F. G. Johnson, Wiley,London, 1980. 4 R. Mason and A. 1. M. Rae, J. Chem. SOC.A, 1968, 778. 5 0. S. Mills and J. P. Nice, J. Organomet. Chem., 1967, 9, 339. 6 N. C. Webb and R. E. Marsh, Acta Crystallogr., 1967, 22, 382.

FundersFunder number
U.S.A.-Israel Binational Science Founda- tion

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