Synthesis, crystal structure and IR spectroscopy of MnII(2-IC)2(NC)(DMSO) and [MnII(2-IC)2(phen)(H2O)]·DMA; (2-HIC, indole-2-carboxylic acid; phen, 1,10-phenanthroline; NC, 2,9-dimethyl-1,10-phenanthroline; DMSO, dimethyl sulfoxide; DMA, dimethyl acetamide); catalysts for the disproportionation of h