A Facile Synthetic Route to a Family of Mn(III) Monomers and their Structural, Magnetic and Spectroscopic Studies.

We report a rapid and facile synthetic route to the synthesis of a family of Mn(III) monomers of general formula [Mn(III)F3(H2O)(L1-6)]·xH2O·yMeOH (where L1 = 2,2'-Bipyridyl, x = 2, y = 0 (1′); L2 = 1,10'-Phenanthroline, x = y = 0 (2′); L3 = 6-Methyl-2,2'-dipyridyl, x = y = 0 (3), L4 = 4,4-Dimethyl-2,2'-dipyridyl, x = 2, y = 0 (4), L5 = 5,5'-Dimethyl-2,2'-dipyridyl, x = 0, y = 0.5 (5) and L6 = 5-Chloro-1,10-phenanthroline, x = y = 0 (6). Magnetic susceptibility and magnetisation experiments have been employed to elucidate the anisotropic D tensor for each family member (ranging from -3.01 cm-1 in 2' to -4.02 cm-1 in 5), while multi-frequency / high-field EPR spectroscopic measurements and subsequent simulations gave similar values for complexes 1' (-4.25 cm-1), 2' (-4.03 cm-1), 4 (-3.90 cm-1) and 5 (-4.04 cm-1). The terminal Mn-F vibrational stretches in 1′-6 have been probed using Raman spectroscopy.