Spin transitions in a dithiazolyl radical:: Preparation, crystal structures, and magnetic properties of 3-cyanobenzo-1,3,2-dithiazolyl, C7H3S2N2•

被引：57

作者：

Alberola, A ^{[1
]}

Collis, RJ ^{[1
]}

Humphrey, SM ^{[1
]}

Less, RJ ^{[1
]}

Rawson, JM ^{[1
]}

机构：

[1] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

来源：

INORGANIC CHEMISTRY | 2006年 / 45卷 / 05期

关键词：

D O I：

10.1021/ic051935p

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The incorporation of the electronegative cyano group into the structure of the title dithiazolyl radical 1 induces a lamellar packing motif that favors spin-transition behavior. Variable-temperature magnetic studies on 1 reveal a reversible phase transition at 250 K between a diamagnetic low-temperature phase and a paramagnetic high-temperature phase. X-ray crystal structures at 180(2) and 300(2) K reveal that both phases crystallize in the space group P2(1)/c, with the phase transition associated with a doubling of the crystallographic a axis, The concomitant change in magnetic properties is associated with a change from a paramagnetic regular pi stack of radicals and a diamagnetic distorted pi stack in which an energy gap opens up at the Fermi level corresponding to a Peierls-like transition.

引用

页码：1903 / 1905

页数：3

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