Chiral tetranuclear NiII clusters derived from Schiff bases and azido co-ligands. (1st August 2018)

• Record Type: Journal Article
• Authors: Mayans, J.; Martin, A.; Font-Bardia, M.; Escuer, A.
• Is Part Of: Polyhedron. Volume 150(2018)
• Page Start: 10
• Page End: 14
• Publication Date: 2018-08-01
• Subjects: Nickel -- Schiff base -- Magnetism -- Chirality -- Circular dichroism; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2018.05.002
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Chiral defective dicubane nickel clusters has been obtained from the blend of enantiomerically pure Schiff bases and azido coligands with the new [Ni4 (μ1, 1, 1 -N3 )2 (μ-Cl)2 (μ-OR)2 ] core. Susceptibility measurements reveal dominant ferromagnetic interactions and strong positive zero field splitting of the S = 4 ground state. Abstract: Chiral tetranuclear clusters have been obtained employing enantiomerically pure Schiff bases and azido coligands. The core of the new clusters shows defective dicubane topology with two vertices occupied by two μ1, 1, 1 -N3 ligands. Linkage between the Ni II cations is completed with two μ-O(phenoxo) and two μ-Cl bridging ligands. The new systems have been characterized by single crystal X-ray analysis, electronic circular dichroism and susceptibility/magnetization measurements that reveal ferromagnetic response and strong positive zero field splitting of the S = 4 ground state.