| Publication Type |
Journal Article |
| Title |
Radical Cation Salts of Cyanobenzene-Ethylenedithio-TTF Electron Donors with Halide (Cu and Hg) Binuclear Anions |
| Authors |
Goncalo Lopes Ana Cristina Goncalves Vasco da Gama Dulce Simão Isabel Cordeiro Santos Laura C. J. Pereira Manuel Almeida Sandra Rabaca |
| Groups |
BioMol |
| Journal |
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY |
| Year |
2019 |
| Month |
April |
| Volume |
|
| Number |
14 |
| Pages |
1875-1883 |
| Abstract |
Three salts of the two isomers of the dissymmetric TTF-derivative cyanobenzene-ethylenedithio-tetrathiafulvalene (CNB-EDT-TTF) with binuclear polyhalide complex dianions, namely [4-CNB-EDT-TTF](2) [Cu2Cl6] (1); [5-CNB-EDT-TTF](2) [Cu2Cl6] 2CH(2)Cl(2) (2) and [5-CNB-EDT-TTF](2) [Hg2Br6] (3) were prepared and characterized by single-crystal X-ray diffraction and magnetic susceptibility measurements. In spite of the different structural types of these compounds, the three compounds present donors in dimerized stacks. The crystal structures of 1 and 3 consist of segregated head-to-tail donor dimer stacks and dianion columns. The structural motif of 2 is mixed columns of alternating head-to-tail donor dimers and dianions. The three salts present C-N center dot center dot center dot H-C interactions, which in 2 and 3 can be described as a R-2(2)(10) synthon. The magnetic susceptibility of the salts with the paramagnetic (Cu2Cl6)(2-) dianion (1 and 2) show that they behave as paramagnets where the Cu2+ atoms of the dianion are antiferromagnetically coupled with magnetic exchange values J/k(B) of -58.8 and -155.6 K, respectively. The different J values are associated with differences in dianion geometry. |
| DOI |
http://dx.doi.org/10.1002/ejic.201900146 |
| ISBN |
|
| Publisher |
|
| Book Title |
|
| ISSN |
1434-1948 |
| EISSN |
1099-0682 |
| Conference Name |
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| Bibtex ID |
ISI:000465098700004 |
| Observations |
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