Structure and reactivity of a bis(.mu.-acetato-O,O')diiron(II) complex, [Fe2(O2CCH3)2(TPA)2](BPh4)2. A model for the diferrous core of ribonucleotide reductase

[Fe 2 (O 2 CCH 3 ) 2 (TPA) 2 ](BPh 4 ) 2 (1, TPA=tris-2-pyridylmethyl)amine) serves as a model for the diferrous core of ribonucleotide reductase. 1 crystallizes in the space group P1 with an inversion center located in the center of the bis(μ-acetato)diiron(II) core.