Structure and magnetism of a chiral Perovskite-like dicyanamidometallate framework

Abstract

Perovskite-like compounds have attracted great attention because of their good properties, such as electrical, optical, and magnetic properties, etc. Herein, a new perovskite-like anionic dicyanamidometallate, namely (Bu₃MeP)[Ni(dca)₃] (1) (Bu₃MeP = tributylmethylphosphine cation, dca = dicyanamide), was synthesized and structurally characterized by elemental analysis, IR spectrum, thermogravimetric analysis, and single-crystal X-ray diffraction. The compound crystallizes in the tetragonal crystal system with the chiral space group P4₃2₁2, and exhibits a three-dimensional anionic dicyanamidometallate framework from Ni²⁺ units bridged by dicyanamides, in which tributylmethylphosphine cations are accommodated in the voids. The butyl groups present two conformations in the tributylmethylphosphine cation, resulting in chirality character occurred in compound 1. Variable-temperature magnetic susceptibility analysis indicates that weak ferromagnetic interaction exists between the nickel(II) ions coupling by μ_1,5-bridings.

KEY WORDS: Perovskite-like, Dicyanamidometallate, Crystal structure, Magnetic properties

Bull. Chem. Soc. Ethiop. 2024, 38(5), 1251-1260.                                                 

DOI: https://dx.doi.org/10.4314/bcse.v38i5.5