Abstract
An iminonitroxide triradical ( 1 ) has been synthesized, in which a ground-state singlet π-biradical and a π-monoradical are united by σ-bonds. The ground state of the molecular assemblage of 1 has been found to be nonmagnetic, which is attributable to an exotic spin alignment predicted in the theory of generalized ferrimagnetism. A novel iminonitroxide triradical, p -triIN ( 1 ), has been synthesized, in which a π-conjugated biradical with a singlet ground state and a doublet monoradical are united by σ-bonds. The intramolecular exchange interaction within the para -phenylene-based biradical moiety has been found to be antiferromagnetic (2 J (π)/ k B = −30.8 K) from magnetic susceptibility measurements on a parent biradical, p -bisIN ( 2 ). The magnetic properties of 1 have been examined by magnetic susceptibility χ m . Upon cooling, the χ m T value for 1 has decreased and passed across 0.38 emu mol −1 K, which is expected for one mol of S = 1/2 spin with g = 2.0. The magnetic behavior of 1 indicates that the ground state of the molecular assemblage of 1 in the crystal is diamagnetic, which is attributable to one of the exotic spin states as predicted in a theoretical model of generalized ferrimagnetism. The possible occurrence of the generalized ferrimagnetic spin alignment is concluded in view of the magnetic properties of 1 .
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call