Synthesis of molecular ferromagnetics [R3R?X]MCr(C2O4)3 (X = N, R = Bun, R? = Prn, Et, Me; X = P, R = Ph, R? = Bun; M = Mn, Fe, Co, Ni, Cu)

Abstract

The synthesis, IR spectra, and the temperatures of the transition into a ferromagnetic state (T c) of layered ferromagnetics [R3R′X[MCr(C2O4)3 (M = Mn, Fe, Co, Cu, and Ni) with the [Ph3BuP]+, [Bu3R′N]+ (R′ = Pr, Et, and Me) cations capable of subsequently changing the distances between metallooxalate layers have been considered. The temperatureT c has been found to be independent of the size of the organic cation. It is believed that the determining factors in the transition to a ferromagnetic state are exchange interactions inside the metallooxalate layer.