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1.65 mmol). Stirring the reaction mixture for 12 h at room tempera-
ture gave a red solution. The solvent was removed under vacuum,
and the solid residue was washed with hexane (2ϫ3 mL) and dried
under vacuum to give
a red solid. Yield: 0.90 g (89%).
C24H26Mo2O6 (602.34): calcd. C 47.86, H 4.35; found C 48.10, H
1
4.26. IR (THF): ν = (CO) 2008, 1900 cm–1. H NMR (400 MHz,
˜
C6D6): δ = 4.5 (s, 1 H, Cp: -CH), 1.72, 1.77 (both s, each 6 H, Cp:
-CH3) ppm. 13C NMR (plus APT, 100 MHz, C6D6): δ = 234.9 (–,
CO), 107.3, 105.5 (both –, Cpipso: C-Me), 92.4 (+, Cp: CH), 10.4,
12.6 (both +, Cp: -CH3) ppm.
Supporting Information (see also the footnote on the first page of
this article): Cartesian coordinates of the DFT optimised com-
pounds.
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Financial support from the Dirección General de Investigación Ci-
entífica y Técnica of Spain (Project MAT2007-60997), Comunidad
Autónoma de Madrid (Project S-0505/PPQ/0328), Universidad de
Alcalá, UAH (Project CCG08-UAH/PPQ-4026) and Agencia In-
ternacional Española de Cooperación Internacional, AECI, (Pro-
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Educación y Ciencia of Spain for funding through the RYC Pro-
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Received: January 19, 2009
Published Online: March 12, 2009
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