catena-Poly[[trans-bis(ethane-1,2-di-amine-κ2N,N′)copper(II)]-μ-dithion-ato-κ2O:O′] and trans-diaquabis-(propane-1,3-diamine-κ2N,N′)-copper(II) dithionate

In title anhydrous catena-poly[[trans-bis(ethane-1,2-diamine-kappa(2)N, N') copper(II)]-mu-dithionato-kappa(2)O:O'], [Cu(S2O6)(C2H8N2)(2)](n) or [{H2N(CH2)(2)NH2}(2)Cu(O.O2SSO2.O)](infinity), successive Cu atoms are bridged by a single doubly charged dithionate group, forming a one-dimensional polymer with inversion centres at the metal atoms and the mid-point of the S-S bond [Cu-O=2.5744 (15) Angstrom]. In title (hydrated) trans-diaquabis-(propane-1,3-diamine-kappa(2)N,N') copper(II) dithionate, [Cu(C3H10N2)(2)(H2O)(2)](S2O6) or [{H2N(CH2)(3)NH2}(2)Cu(OH2)(2)](S2O6), both ions have imposed 2/m symmetry. The 'axial' anion components are displaced by a pair of water ligands [Cu-O=2.439 ( 3) Angstrom], the shorter Cu-O distance being compensated by the lengthened Cu-N distance [2.0443 (18), cf. 2.0100 (13) and 2.0122 (16) Angstrom].