The title compounds, a hydrogen-bonded linear chain, [Mn-(C 18H18N2O4)(H2O) 2]ClO4, (I), a hydrogen-bonded pseudodimer, [Mn(C 16H10Cl4N2O2)(CH 4O)(H2O)]ClO4, (II), and a dimer, [Mn 2(C18H18N2O2) 2(CH4O)2](ClO4)2, (III), respectively, have been structurally characterized. The three complexes are completely different in their structural features, despite identical counter-anions and only slight modification of the substituents in the ligands. Complex (I) affords an elongated octahedral coordination environment, with axial Mn-O(water) distances of 2.259 (3) and 2.313 (3) Å, which forms hydrogen-bonded linear chains along the crystallographic c axis. Hydrogen-bonded pseudo-dimeric compound (II) also affords an elongated octahedral coordination environment, with axial Mn-O(CH3OH) = 2.222 (3) Å and Mn-O(water) = 2.266 (3) Å. Dimeric complex (III) is centrosymmetric and consists of distorted octahedral Mn atoms, with axial Mn-O(CH 3OH)=2.242 (2) Å and Mn-O(phenolate) = 2.348 (1) Å, connected via bridging O atoms from one of the ligands. The magnetic properties of the three complexes are described.
|Journal||Acta Crystallographica Section C: Crystal Structure Communications|
|Publication status||Published - 2005 Jul 1|
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)