The interaction of alpha-hydroxycarboxylic acids with metal ions: Lactic acid (H2L1) and 2-methyllactic acid (H2L2) with cobalt(II) crystal and molecular structures of [Co(HL1)(2)(H2O)(2)]center dot H2O and [Co(HL2)(2)(H2O)(2)]

摘要

The cobalt(II) complexes [Co(HL1)(2)(H2O)(2)].H2O) (1) and [Co(HL2)(2)(H2O)(2)] (2) [(HL1)(-) = (+/-)-lactate, (HL2)(-) = 2-Methyl- lactate] were prepared. and characterized structurally. The cobalt atom is in a distorted octahedral environment in both compounds. Both alpha-hydroxycarboxylato ligands are O,O'-bidentate chelating monoanions. The presence of a lattice water molecule in 1 makes its supramolecular organization different from that of 2. The thermal behaviour of both compounds was also investigated. [References: 22]