Synthesis, Structure, and Magnetic Properties of the Oxalate-Based
Bimetallic Ferromagnetic Chain {[K(18-crown-6)][Mn(H2O)2Cr(ox)3]}∞
(18-crown-6 = C12H24O6, ox = C2O42-)

Coronado, Eugenio; Galán-Mascarós, José R.; Gómez-García, Carlos J.; Martí-Gastaldo, Carlos

doi:10.1021/ic050258w.s002

ic050258w_si_002.pdf (355.26 kB)

Synthesis, Structure, and Magnetic Properties of the Oxalate-Based Bimetallic Ferromagnetic Chain {[K(18-crown-6)][Mn(H₂O)₂Cr(ox)₃]}_∞ (18-crown-6 = C₁₂H₂₄O₆, ox = C₂O₄^2-)

journal contribution

posted on 2005-09-05, 00:00 authored by Eugenio Coronado, José R. Galán-Mascarós, Carlos J. Gómez-García, Carlos Martí-Gastaldo

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 P2₁/c space group [a = 21.011(2) Å, b = 11.265(2) Å, c = 15.748(3) Å, β = 105.952(6)°, V = 3584(1) Å³, and Z = 4] and contains [Mn(H₂O)₂Cr(ox)₃]_∞ 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.