Synthesis and crystal structure of a three-dimensional 3d-4f heterometallic supramolecular complex {Eu(DMF)4(H2O)2Cr(CN)6·;H2O}n.

A lanthanide-transition heterometallic supramolecular complex {Eu(DMF)4(H2O)2Cr(CN)6·H2O}n (1) has been synthesized based on the reaction of K3[Cr(CN)6], N,N-dimethylformamide (DMF) and Eu(NO3)3·6H2O. 1 crystallizes in the monoclinic space group P2(1)/c with a=13.130(6)Å, b=12.923(7)Å, c=19.184(9)Å and Z=4. In 1 each Eu(III) is eight-coordinate with six oxygen atoms from four DMF molecules and two H2O molecules and two nitrogen atoms from two cis-bridging CN ligands to form a distorted dodecahedron. 1 has a three-dimensional network created by the incorporation of coordinative linkage, three inter-molecular and an intrachain hydrogen bond. [ABSTRACT FROM AUTHOR]