Selective dehydrogenation of amines with respect to coordination geometry: different oxidation products of tricyano[bis(2-pyridylmethyl)amine]ferrate(II) between mer- and fac-isomers.
Both the fac- and mer-isomers of tricyano[bis(2-pyridylmethyl)amine = 2-DPA]ferrate(II) were isolated and their spectroscopic properties compared. The fac-isomer was converted to the corresponding iron(III) complex under acidic conditions. Oxidation of the ferrate(II) complexes with ammonium peroxodisulfate yielded the mer-isomer of the dehydrogenated ferrate(II) compound, but only the metal-oxidized iron(III) complex for the fac-isomer was produced under neutral or basic conditions. Electrochemical measurements confirmed this difference in the oxidation behavior, in which the nature of the coordination governs the ease of oxidative dehydrogenation.
Graduate School of Pharmaceutical Sciences, Kumamoto University, Oe-honmachi 5-1, Kumamoto 862-0973, Japan.
Masafumi
M
Goto
Nobuhiro
N
Koga
Yasuhiko
Y
Ohse
Yuka
Y
Kudoh
Michiko
M
Kukihara
Yoshinori
Y
Okuno
Hiromasa
H
Kurosaki