Title

Structural, Electronic, and Magnetic Properties of Fe[HC(3,5-Me₂pz)₃]₂(BF₄)₂ (pz = Pyrazolyl): Observation of Unusual Spin-crossover Behavior

Abstract

The complex Fe[HC(3,5-Me2pz)3]2(BF4)2, shown crystallographically to contain a unique octahedral N6Fe site, shows a new type of spin-crossover behavior. The solid is high-spin from 350 K down to a temperature of 206 K, but below 206 K it undergoes a very abrupt decrease in magnetic moment. Mossbauer studies show conclusively that the magnetic moment change observed at 206-200 K arises from the complex changing over a very small temperature range from a high-spin state at higher temperatures to a mixture of high-spin and low-spin at lower temperatures, a mixture that does not change composition as the temperature is lowered to 5 K.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2000 American Chemical Society (ACS), All rights reserved.


Share

 
COinS