Investigation of the Monomer−Dimer Equilibria of Molybdocenes in Water
Organometallics2000Vol. 19(15), pp. 2927–2931
Citations Over TimeTop 12% of 2000 papers
Abstract
Molybdocenes form monomeric and dimeric complexes upon dissolution in water. The solution structures of the molybdocenes at neutral pH are inferred as the monomeric [(CpR)2Mo(OH2)(OH)]+ and the dimeric [(CpR)2Mo(μ-OH)2Mo(CpR)2]2+. The equilibrium constants for the monomer−dimer equilibria were obtained from 1H NMR dilution studies as K‘eq = (7.9 × 10-2) ± (1.0 × 10-3) M for R = CH3 at pD 7 and as Keq = (3.5 × 10-2) ± (1.3 × 10-3) M for R = H at pD 3.5. Qualitatively, the monomer of the CpMe molybdocene is more favored than the Cp analogue, compared to their respective dimers.
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