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Charge-transfer salts of methylferrocenes with DCNQI derivatives (DCNQI = N,N′-dicyano-1,4-benzoquinonediimine): Crystal structures and magnetic properties

Authors :
Hitoshi Ohta
Takahiro Sakurai
Tomoyuki Mochida
Yusuke Funasako
Source :
Journal of Organometallic Chemistry. 696:2621-2626
Publication Year :
2011
Publisher :
Elsevier BV, 2011.

Abstract

Organometallic charge-transfer salts composed of decamethyl-, octamethyl-, and dimethylferrocene with N,N′-dicyano-1,4-benzoquinonediimine (DCNQI) derivatives were prepared. [Fe(C5Me5)2][(MeO)2DCNQI] (1) and [Fe(C5Me4H)2][Me2DCNQI] (2) were 1:1 DA salts with mixed-stack structures, whereas [Fe(C5Me4H)2][(MeO)2DCNQI]2 (3) and [Fe(C5MeH4)2][DCNQI]2 (4) were 1:2 DA salts. 3 exhibited a segregated-stack structure, in which charge separation was observed in the acceptor column. 1 became a metamagnet below TN = 5.0 K, whereas the other salts were paramagnets. Valence states and charge-transfer (CT) transitions in these complexes are discussed based on the neutral–ionic (NI) phase diagram.

Details

ISSN :
0022328X
Volume :
696
Database :
OpenAIRE
Journal :
Journal of Organometallic Chemistry
Accession number :
edsair.doi.dedup.....d060c5f5a50a475c4ba77d665943c23e
Full Text :
https://doi.org/10.1016/j.jorganchem.2011.04.003