Structure and magnetic properties of a sulfur–nitrogen radical, methylbenzodithiazolyl
作者:Gordon D. McManus、Jeremy M. Rawson、Neil Feeder、Fernando Palacio、Patricia Oliete
DOI:10.1039/b004992l
日期:——
An X-ray crystal structure of the methylbenzodithiazolyl
radical MeC6H3S2NË, MBDTA, reveals
that it forms a regularly spaced Ï-stack motif in the solid state;
variable temperature magnetic studies show that the susceptibility passes
through a broad maximum at 140Â K indicative of exceptionally strong
antiferromagnetic coupling for an organic radical possessing extended magnetic
interactions. Its behaviour can be modelled as a two-dimensional Heisenberg
square lattice of S
= 1/2 ions with J
=
â72Â K.
甲基苯并二噻唑基自由基 MeC6H3S2NË (MBDTA) 的 X 射线晶体结构揭示其在固态中形成规则间距的 π-堆叠模式;可变温度磁学研究表明,其磁化率在 140 K 时通过一个宽阔的最大值,表明该有机自由基具有异常强的反铁磁耦合,且具备扩展的磁相互作用。其行为可以被建模为 S = 1/2 离子的二维海森堡平方格子,J = -72 K。