Nickel-substituted quasi-Wells-Dawson-type

Nickel-substituted quasi-Wells-Dawson-type polyfluorooxometalate, [Ni"(H2O)H2F,NaW 7O52], was the most active for epoxidation of olefins and allylic alcohols with H2O2 among various polyfluorooxometalates, [M(L) HoFfiNaWiyOgg]" - (M = Zn C o", Mn", Fe", Ku", Ni", and V ) [102]. Partial substitution of an oxide position by fluoride had a significant electronic effect on a neighboring transition metal center. 

R. Ben-Daniel, A. M. Khenkin, R. Neumann, The nickel-substituted quasi-Wells-Dawson-type polyfluoroxometalate, [Ni (H2O)H2Ff,NaW]7O 55] , as a uniquely active nickel-based catalyst for the activation of hydrogen peroxide and the epoxidation of alkenes and alkenols, Chem. Eur. J. 6 (2000) 3722. 

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