Vibrational studies of the solid imidazole and pyridine adducts of metal(II) saccharinates. Part II. Mn(IT) and Fe(II) imidazole saccharinates

Novel adducts of Mn(II) and Fe(II) saccharinates with imidazole were synthe sized and their protonated and deuterated analogues were investigated by th e means of FT-IR spectroscopy at room and at liquid-nitrogen boiling temper ature. The appearance of the characteristic OH/OD, NH, CO and SO2 stretchin g bands was employed together with the earlier spectra-structure correlatio ns to predict certain structural details about the complexes. The IR spectr a reveal pronounced structural similarity and possible isomorphism with the Co and Ni adducts of formula [M(C3H4N2)(4)(H2O)(2)](C7H4NO3S)(2). There is a single crystallographic type of asymmetrically bonded water molecules in the structure. All saccharinato ions are structurally equal. The O-S-O ang les should be similar with those in Mg(sac)(2).7H(2)O and Na-3(sac)(3).2H(2 )O. (C) 2001 Elsevier Science B.V. All rights reserved.