Azide‐Bridged Copper(II) and Manganese(II) Compounds with a Zwitterionic Tetrazolate Ligand: Structures and Magnetic Properties

Abstract

AbstractTwo azide‐bridged coordination polymers, [Cu(mptz)(N3)2] (1) and [Mn(mptz)(N3)2H2O] (2), (mptz = N‐methyl‐4‐pyridinium tetrazolate), were synthesized and crystallographically and magnetically characterized. Compound 1 is a neutral 1D coordination polymer in which the CuII ions, which are in a square pyramidal surrounding, are linked by double end‐on azide bridges in an alternating basal–basal and basal–apical fashion. Compound 2 exhibits a 3D MnII–azide coordination framework with the (10,3)‐b net topology, in which the double end‐on–azide‐bridged dimanganese units are interlinked by single end‐to‐end azide bridges. The magnetic analyses indicated that 1 behaves magnetically as a quasi‐dimer with an S = 1 ground state due to a strong ferromagnetic interaction through the basal–basal azide bridges and a very weak antiferromagnetic coupling through the basal–apical azide bridges. Compound 2 exhibits 3D antiferromagnetic behaviors with TN = 24.0 K, where the end‐to‐end and end‐on azide bridges mediate the antiferromagnetic and ferromagnetic interactions, respectively.