Abstract

A novel molecular heterospin system composed of high-spin MnII (S = 5/2) and (3,5-dichloro-4-pyridyl)bis(2,4,6-trichlorophenyl)methyl radical (PyBTM; S = 1/2) was developed. The MnII ion formed distorted octahedral coordination geometry with two PyBTM radicals coordinated in the trans configuration. Magnetic studies disclosed an intramolecular antiferromagnetic exchange interaction between the spins on PyBTM and MnII with JR–Mn/kB of −9.7 K. The antiferromagnetic interaction was confirmed by broken-symmetry density functional theory calculations. This study reveals the definite intramolecular exchange interaction in the MnII–triarylmethyl radical system for the first time.

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