Kristallstruktur von MnSO3 • H2O , eine fastsymmetrische schichtstruktur / Crystal structure of MnSO3 • H2O, a nearly symmetrical layer structure
The crystal structure of MnSO3H2O , space group P21/n, Z = 4. Dx = 2.842(2) g · cm-3, a = 4.843(3), b = 12.807(6), c = 5.762(4) Å, β = 90.39(4)° has been determined. MnSO3·H2O crystallizes in a hitherto unknown structure type, which is closely related to that of orthorhombic MnSeO3· D2O. Coordination of Mn is octahedral involving O atom s from one water moleculeo and four different sulfite ions. The Mn-O distances range from 2.136(3) to 2.285(3)Å . The S-O distances are 1.552(3), 1.556(3) and 1.482(3)!Å. The MnO6 octahedra form layers parallel (010) by sharing four equatorial vertices. The layers are connected by weak hydrogen bonds and shifted laterally by 0.7 Å from the arrangement with m symmetry, found in MnSeO3·D2O. Due to this shift, the water molecule is asymmetrically bonded, as shown by both the O-H···O distances (2.967(4)-3.834(5)Å) and the OD stretching modes (2554 and 2576 cm-1) of partly deuterated samples