Thiodiacetate-manganese chemistry with N-ligands: unique control of the supramolecular arrangement over the metal coordination mode

Abstract

[EN] Compounds based on the Mn-tda unit (tda=S(CH2COO)2 2) and N co-ligands have been analyzed in terms of structural, spectroscopic, magnetic properties and DFT calculations. The precursors [Mn(tda)(H2O)]n (1) and [Mn(tda)(H2O)3] H2O (2) have been characterized by powder and X-ray diffraction, respectively. Their derivatives with bipyridyl-type ligands have formulas [Mn(tda)(bipy)]n (3), [{Mn(N-N)}2(u-H2O)(u-tda)2]n (N-N=4,4'-Me2bipy (4), 5,5'-Me2bipy, (5)) and [Mn(tda){(MeO)2bipy} 2 H2O]n (6). Depending on the presence/position of substituents at bipy, the supramolecular arrangement can affect the metal coordination type. While all the complexes consist of 1D coordination polymers, only 3 has a copper-acetate core with local trigonal prismatic metal coordination.