Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one

Siemeling U, Scheppelmann I, Neumann B, Stammler H-G, Schoeller W (2004)
ORGANOMETALLICS 23(4): 626-628.

Journal Article | Published | English

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Abstract
The aromatic compounds fluorenone (1) and 4,5-diazafluoren-9-one (2) behave like cyclopentadienones in their reaction with [Cp*Co(C2H4)(2)] (3a), affording the sandwich-type complexes [Cp*Co(eta(4)-1)] (4) and [Cp*Co(eta(4)-2)] (5), respectively, whose structures have been determined by X-ray diffraction. Both complexes show double-bond fixation in their eta(2)-coordinated six-membered rings and belong to a new structure type of mononuclear organometallics. The cobalt-coordinated ligands 1 and 2 present in 4 and 5, respectively, may be replaced by two molecules of carbon monoxide. In accord with their cyclopentadienone-like nature, they are nucleophilic and undergo O-acylation with acetyl chloride, affording cobaltocenium species.
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Siemeling U, Scheppelmann I, Neumann B, Stammler H-G, Schoeller W. Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one. ORGANOMETALLICS. 2004;23(4):626-628.
Siemeling, U., Scheppelmann, I., Neumann, B., Stammler, H. - G., & Schoeller, W. (2004). Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one. ORGANOMETALLICS, 23(4), 626-628.
Siemeling, U., Scheppelmann, I., Neumann, B., Stammler, H. - G., and Schoeller, W. (2004). Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one. ORGANOMETALLICS 23, 626-628.
Siemeling, U., et al., 2004. Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one. ORGANOMETALLICS, 23(4), p 626-628.
U. Siemeling, et al., “Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one”, ORGANOMETALLICS, vol. 23, 2004, pp. 626-628.
Siemeling, U., Scheppelmann, I., Neumann, B., Stammler, H.-G., Schoeller, W.: Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one. ORGANOMETALLICS. 23, 626-628 (2004).
Siemeling, U, Scheppelmann, I, Neumann, B, Stammler, Hans-Georg, and Schoeller, Wolfgang. “Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one”. ORGANOMETALLICS 23.4 (2004): 626-628.
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