Synthesis, crystal structure, and magnetic characterization of chiral Schiff-base manganese(III) complex containing cocrystallized crown ether molecule

Abstract

A chiral Schiff-base Mn(III) compound containing cocrystallized crown ether {Mn[(R,R)-Salcy]· (H 2 O) 2 } 2 (ClO 4 ) 2 ·18-Crown-6 (I), where (R,R)-Salcy = (R,R)-N, N'-(1,2-cyclohexanediylethylene)bis(salicylideneiminato)dianion, has been synthesized by the reaction of {Mn[(R,R)-Salcy](H 2 O) 2 }ClO 4 with 18-crown-6 ether and K 4 [Mo(CN) 8 ]. X-ray diffraction analysis revealed that the cationic mononuclear Mn(III) Schiff-base compounds were self-complementary via intermolecular O-H···O H-bond formed by coordinated aqua ligand of one molecule and phenolic oxygen atoms of the neighboring molecule, giving supramolecular dimeric structure.The H-bond between O atoms of the cocrystallized crown molecule and that of the mentioned above dimer supported formation of one-dimensional supramolecular chain structure which can be linked to twodimensional supramolecular network based on intermolecular O-H···Cl weak interactions. Our study of its magnetic properties revealed weak antiferromagnetic coupling between the adjacent Mn(III) ions.