1 Instituto de Ciencia Molecular, Universidad de Valencia y Fundación General de la Universidad de Valencia, Polígono de la Coma s/n, 46980 Paterna, Spain. eugenio.coronado@uv.es
Neutral layers of the bimetallic oxalate complex {[Co(H2O)2]3[Cr(ox)3]2}infinity are formed in the presence of a crown ether and stabilized by hydrogen bonding. The resulting soluble ferromagnet orders at Tc = 7.4 K.