A mononuclear manganese(II) complex, [Mn(4-bzpy) 4 Cl 2 ] (4-bzpy = 4-benzylpyridine), exhibits a slow magnetic relaxation with three relaxation modes that is supported by the external magnetic field. The lowfrequency mode shows an exceptionally slow relaxation time: τ = 798 ms at T = 1.9 K and B DC = 0.35 T. The high-frequency domain exhibits unusual acceleration of the relaxation time upon cooling below 3.5 K.

A pentadentate Schiff-base ligand 3,5Cl-L2− and NCSe− form a iron(iii) mononuclear complex [Fe(3,5Cl-L)(NCSe)], which shows a thermally induced spin crossover with a broad hysteresis width of 24 K between 123 K (warming) and 99 K (cooling).

Two hexacoordinate Mn(II) complexes containing a chelating residue of hexafluoroacetylacetone and (Cl-substituted) 4-phenoxypyridine show DC magnetic functions typical for S = 5/2 spin systems: g ~ 2, D – small....

A new series of Fe(III) mononuclear complexes of [Fe(Lam)(X)] type {where X = Cl (1), NCSe (2), NCS (3), N3 (4), NCO (5)} have been prepared and characterized in detail....

Two novel 1D chains based on heptacoordinated Mn(II) ions bridged by variously derived benzoato ligands were prepared. The unusual structure of [MnII(L1)(L2)2]n1 and [MnII(L1)(L3)2]n2 {where L1 = 2,6-dimethanolpyridine,...