Synthese und Struktur der Cobalt(III)-Komplexe 14gliedriger cis- und trans-N2S2-Dibenzomakrocyclen mit zwei koordinierenden Acetatogruppen

Synthesis and Structure of Cobalt(III) Complexes of 14-Membered cis- and trans-N₂S₂ Dibenzo Macrocycles with two Pendant Acetato Groups The isomeric fourteen membered macrocyclic ligands 6,7,9,15,16,18-hexahydrodibenzo[f,m][1,8]dithia[4,11]diazacyclotetradecine-8,17-diacetic acid-0.5-hydrate (H₂L³), C₂₂H₂₆N₂O₄S₂ · 0.5 H₂O and 6,7,13,15,16,18-hexahydrodibenzo-[e,m][1,4]dithia[8,11]diazacyclotetradecine-14,17-diacetic acid-1.5-hydrate (H₂L⁶), C₂₂H₂₆N₂O₄S₂ · 1.5 H₂O with cis- and trans-N₂S₂ donorsets and two pendant acetato groups form the stable complexes [Co(L³)]ClO₄ · 2 H₂O ( 1 ) and [Co(L⁶)]ClO₄ · H₂O ( 2 ). Co(III) is octahedrally coordinated herein to all six donor centers of the respective ligand. The macrocyclic rings are folded. The metal ions are located outside the macrocyclic cavity. The mean Co? N, Co? O and Co? S distances are 196, 190 and 224 pm, respectively. Crystal data: 1 , monoclinic, space group C2/c, a = 3 797.7(9), b = 763.8(3), c = 2 207.0(7) pm, β = 123.17(2), Z = 8, 3 445 reflections, R(R_w) = 0.072(0.070); 2 , monoclinic, space group C2/c, a = 3 197.1(6), b = 880.4(2), c = 1 890.6(4) pm, β = 112,19(3)°, Z = 8, 4 415 reflections, R(R_w) = 0.062(0.064).