Coordination complexes with the redox active tetrathiafulvalene based imino-pyrazine ligand: Syntheses, a radical cation salt, crystal structures and electrochemistry

Goulven Cosquer, Fabrice Pointillart, Yann Le Gal, Stéphane Golhen, Olivier Cador, Lahcène Ouahab

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The tetrathiafulvalene based 2-immino-pyrazine derivative (TTF-CHN-2-pyz) (1) was synthesized and characterized. Its radical cation salt (1 +PF6-) was prepared as single crystals by electrocrystallisation. 1+PF6- crystallizes in the triclinic P1 space group. Four 1: 2 bis(hexafluoroacetylacetonate)M(ii) complexes coordinated with 1 were prepared (M = Mn for 2, M = Co for 3, M = Cu for 4 and M = Zn for 5). Complex 2 crystallizes in the monoclinic C2/c space group, complexes 4 and 5 crystallize in the triclinic space group P1. Two pyrazine N atoms from two different donors are coordinated in cis configuration for 2 and trans configuration for 4 and 5 to the metallic ion of M(hfac) 2 (hfac-=hexafluoroacetylacetonate anion). The manganese atom adopts a pseudo-compressed octahedral geometry while the copper and the zinc ions adopt axially elongated octahedral geometries. Both crystal packing structures and electrochemical properties are appropriate for their potential use as starting molecular bricks for conducting and magnetic materials.

Original languageEnglish
Pages (from-to)3495-3502
Number of pages8
JournalDalton Transactions
Issue number18
DOIs
Publication statusPublished - 2009 May 5

ASJC Scopus subject areas

  • Inorganic Chemistry

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