Self‐Assembly of Dimeric Mn^III–Schiff‐Base Complexes Tuned by Perchlorate Anions

Abstract

The synthesis and structural and spectroscopic characterisation of 12 manganese(III)-Schiff-base complexes of the for-n and H 4 L n Schiff-base ligands were obtained by condensation of different diamines (1,2-diaminoethane, 1,2-diamino-2-methylethane, 1,2-diamino-2,2-dimethylethane, 1,3-diamino-2,2-dimethylpropane) and 2,3-dihydroxybenzaldehyde, 3-methoxy-2-hydroxybenzaldehyde or 3-ethoxy-2-hydroxybenzaldehyde.

Crystal structure of N,N′-bis(3-ethoxy-2-hydroxybenzylidene)propane-1,3-diamine, C21H26N2O4

“…The compound crystallized in the triclinic space group P1,whereas the analogous Schiff-base with ethylene group, C 20 H 24 N 2 O 4 ,crystallized in the monoclinic space group C2/c [1]. The analogous compound with butylene chain, C 22H28N2O4,c rystallized also in the space group P1 [2].…”

Crystal structure of N,N'-bis(3-ethoxy-2-hydroxybenzylidene)- octane-1,8-diamine, C26H36N2O4

“…Hydrogen atomsw ere positioned geometrically and allowed to ride on their parent atomswith d(C-H) =0.95 Å(CH), 0.99 Å (CH 2 )or0.98 Å(CH 3 )and U iso (H) =1.2U eq (C) or 1.5U eq (C methyl [3]. Acenterof inversion is located at the centroid of the title molecule, and therefore the asymmetric unit contains one half of the molecule, and the two benzene rings are exactly parallel.…”

Redetermination of diaqua[N,N′-bis(3-methoxy-2-oxidobenzylidene)ethylenediamine-κ4O,N,N′,O′]manganese(III) perchlorate at 100 K

“…The structure of the title compound has been previously determined at room temperature by others [Akitsu et al, 2005;Bermejo et al, 2007; refcodes in the Cambridge Structural Database (CSD; Groom et al, 2016): TAPSOT and TAPSOT01, respectively]. It should be noted that the authors of TAPSOT01 (Bermejo et al, 2007) described the compound as a monohydrate in the experimental section of the corresponding article ('compound 2'), although TAPSOT in the CSD and also the crystallographic data listed in the article clearly correspond to the unsolvated complex.…”