Synthesis, Structures, and Magnetism of Three 1D MnIII Chains with Oxazoline-Based Ligands.

Three novel MnIII polymers, [Mn(phox)2(N3)J0 (1)n [Mn(Etphox)2(N3)]n (2), and (Mn(Etphox)2(C2N3)]n (3), using achiral ligand Hphox (Hphox = 2-(4,5-dihydrooxazol-2-yl)phenol) and chiral ligand HEtphox (HEtphox = 2-(4-ethyl- 4,5-dihydrooxazol-2-yl)phenol) were synthesized and stwcturally and magnetically characterized. All complexes are of 1 D chain structures and fonn 2D frameworks by weak interactions. The adjacent 1 D chains of complex 1 are connected by face-to-face ar-jr interactions, C-H∙∙∙π interactions, and hydrogen bonding, which leads to the formation of a supramolecular 20 sheet structure. The three compounds show antiferroniagnetic coupling between MnIII ions. And compound 2 is a spin-canted weak ferromagnet with TN = 5.6K, showing metamagnetic behavior with a two-step magnetic phase transition. [ABSTRACT FROM AUTHOR]