Journal of Siberian Federal University. Chemistry / Redox Properties of New Carbonyl β-diketonate Rhodium (I) Complexes Containing 1-adamantyl isocyanide Ligand

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2022 15 (4)
Authors
Burmakina, Galina V.; Chudin, Oleg S.; Verpekin, Victor V.; Nedelina, Tatyana S.; Patrusheva, Anastasia A.; Zimonin, Dmitry V.; Rubaylo, Anatoly I.
Contact information
Burmakina, Galina V.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; , ; Chudin, Oleg S.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Verpekin, Victor V.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Nedelina, Tatyana S.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Patrusheva, Anastasia A.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Zimonin, Dmitry V.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; Rubaylo, Anatoly I.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation
Keywords
redox properties; electrochemistry; rhodium; isocyanide; carbonyl; carbonylphosphine; β-diketonate ligand
Abstract

Электрохимическими методами изучены редокс-свойства новых карбонил β-дикетонатных комплексов родия (I), содержащих 1-адамантилизоцианидный лиганд, (β-diketonato) Rh(CO)(CNAd) [β-diketonato = ацетилацетонат (acac), дибензоилметан (dbm), гексафторацетилацетонат (hfac)] на платиновом, стеклоуглеродном и ртутном капельном электродах в ацетонитриле. Проведено сравнение электрохимического поведения новых комплексов с их родственными соединениями (β-diketonato) Rh(CO)(L) [L = CO, PPh3]. Показано, что механизм двухэлектронного окисления изученных комплексов зависит от природы хелатного лиганда. Одноэлектронное восстановление изоцианидных комплексов протекает при потенциалах, промежуточных между значениями Е1/2 восстановления дикарбонильных и карбонилфосфиновых комплексов родия (I), в соответствии с электронодонорной способностью терминальных лигандов CO, CNAd и PPh3

The redox properties of new carbonyl β-diketonate rhodium (I) complexes containing 1-adamantyl isocyanide ligand (β-diketonato)Rh(CO)(CNAd) [β-diketonato = acetylacetonate (acac), dibenzoylmethane (dbm), hexafluoroacetylacetonate (hfac), Ad =1-adamantyl)] were studied by electrochemical methods at platinum, glassed carbon and dropping mercury electrodes in acetonitrile. The electrochemical behaviour of the new complexes and related rhodium compounds (β-diketonato)Rh(CO)(L) [L = CO, PPh3] were compared. The mechanism of two electron oxidation of the studied complexes was shown to depend on the nature of the chelate ligand. One electron reduction of the isocyanide complexes occurs at the Е1/2 values, that are found between the reduction potentials of dicarbonyl and carbonylphosphine rhodium (I) complexes. That is consistent with the electron-donating ability of the terminal CO, CNAd and PPh3 ligands at the Rh atom

Pages
571–579
DOI
10.17516/1998-2836-0319
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/149788