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

Abstract : 3,5-di-tert-Butylcatecholate (DTBC) germanium complexes (DTBC)(2)Ge[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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Submitted on : Tuesday, January 8, 2019 - 3:05:37 PM
Last modification on : Thursday, February 7, 2019 - 2:51:45 PM

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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, Royal Society of Chemistry, 2018, 47 (47), pp.17127-17133. ⟨10.1039/c8dt03397h⟩. ⟨hal-01973912⟩

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