MONONUCLEAR COMPLEXES OF Mn(II) AND Co(II) WITH FERROCENECARBOXYLIC ACID

Mononuclear coordination complexes of Mn(II) and Co(II) with ferrocenecarboxylic acid (FcCOOH) with the composition (NBu4)2[M(FcCOO)3(H2O)2)](FcCOO) are prepared. The XRD study showed that the distorted octahedral environment of the metal atom is formed by oxygen atoms of two water molecules and three FcCOO– anions in such a way that two anions are monodentate coordinated and one anion is bidentate-cyclic. The fourth anion is H-bonded with coordinated water molecules. Negatively charged {[M(FcCOO)3(H2O)2)](FcCOO)}– fragments, containing a new type of mononuclear transition metal carboxylate complex, are separated by tetrabutylammonium cations.