Fluorinated Alkoxides Part VII. Complexes of 2-Acetamidohexafluoro-2-propanol with First-row Transition and Lanthanide Elements

Abstract

2-Acetamidohexafluoro-2-propanol (HAcfp), CH3CONHC(CF3)2OH, may act as a bidentate, uninegative, ligand to give complexes of the type M(Acfp)2 (M = Co2+, Ni2+, Cu2+, Zn2+); M(Acfp)3 (M = Fe3+); M(Acfp)4 (M = Ce4+); or [M(Acfp)4]− (M = lanthanide(III)). Coordination is through the two oxygen atoms, except in the case of copper, where nitrogen also enters into coordination. In the complex Cu(Acfp)2, the amido proton may be removed with NaH to give Na2[Cu(Acfp)2], which undergoes addition reactions with carbonyl groups.Formamide similarly undergoes reaction with hexafluoroacetone to give HCONHC(CF3)2OH, which chelates to copper in the same manner as HAcfp, while succinic acid diamide reacts with hexafluoroacetone to give the compound [—CH2CONHC(CF3)2OH]2, which acts as a tetradentate, dinegative, ligand.Possible structures of the above complexes are discussed.