Synthesis, structure, and magnetic properties of the oxalate-based bimetallic ferromagnetic chain {[K(18-crown-6)][Mn(H2O)2Cr(ox)3]}infinity (18-crown-6 = C12H24O6, ox = C2O4(2-)).
The salt [K(18-crown-6)][Mn(H2O)2Cr(ox)3.0.5(18-crown-6) (1) has been prepared and structurally and magnetically characterized. It crystallizes in the P2(1)/c space group [a = 21.011(2) A, b = 11.265(2) A, c = 15.748(3) A, beta = 105.952(6) degrees , V = 3584(1) A3, and Z = 4] and contains [Mn(H2O)2Cr(ox)3]infinity chains connected through hydrogen bonding to form 2D anionic networks. The magnetic exchange is ferromagnetic [J = +2.23(2) cm(-1)] in the chain and also in between chains, reaching bulk ferromagnetic ordering below 3.5 K.
Coronado
Eugenio
E
Instituto de Ciencia Molecular, Universidad de Valencia, C/Doctor Moliner 50, 46100 Burjassot, Spain.
Galán-Mascarós
José R
JR
Gómez-García
Carlos J
CJ
Martí-Gastaldo
Carlos
C