Halogen-free GeO2 conversion electrochemical reduction vs. complexation in (DTBC)(2)Ge[Py(CN)(n)] (n=0...2) complexes - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Dalton Transactions Année : 2018

Halogen-free GeO2 conversion electrochemical reduction vs. complexation in (DTBC)(2)Ge[Py(CN)(n)] (n=0...2) complexes

Résumé

3,5-di-tert-Butylcatecholate (DTBC) germanium complexes (DTBC)2Ge[Py(CN)n]2 (n = 0…2) have been synthesized from GeO2, 3,5-di-tert-butylcatechol and cyano-substituted pyridines Py(CN)n and characterized by elemental analysis, NMR, IR and UV-VIS spectroscopy. The structure of 1 (with 4-cyanopyridine) has been determined by X-ray single crystal analysis. UV-VIS spectra have shown that these complexes are stable in CH3CN, toluene and CH2Cl2 solutions; in contrast, they are rapidly decomposed by dimethylformamide and tetrahydrofuran. Complexes 1 and 2 (with 4-cyano and 3-cyanopyridine) are electrochemically reducible in toluene/1 M Bu4NPF6 at E = -1.3…-1.7 V vs. AgCl. The quantum-chemical study of these complexes is in accordance with the unsuccessful attempts to obtain analogous derivatives with 2-cyanopyridine and 2,6-dicyanopyridine.

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Chimie
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Dates et versions

hal-01973912 , version 1 (08-01-2019)

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Elena N. Nikolaevskaya, Evgeniya A. Saverina, Alyona A. Starikova, Amel Farhati, Mikhail A. Kiskin, et al.. Halogen-free GeO2 conversion electrochemical reduction vs. complexation in (DTBC)(2)Ge[Py(CN)(n)] (n=0...2) complexes. Dalton Transactions, 2018, 47 (47), pp.17127-17133. ⟨10.1039/c8dt03397h⟩. ⟨hal-01973912⟩
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