title: New functional cyclic aminomethylphosphine ligands for the construction of catalysts for electrochemical hydrogen transformations.
abstract: Eight-membered cyclic functional bisphosphines, namely 1,5-di-aryl-3,7-di(2-pyridyl)-1,5-diaza-3,7-diphosphacyclooctanes (aryl=2-pyridyl, m-tolyl, p-tolyl, diphenylmethyl, benzyl, (R)-(+)-(α-methyl)benzyl), with 2-pyridyl substituents on the phosphorus atoms have been synthesized by condensation of 2-pyridylphosphine, formaldehyde, and the corresponding primary amine. The structures of some of these bisphosphines have been investigated by X-ray crystallography. The bisphosphines readily form neutral P,P-chelate complexes [(κ(2)-P,P-L)MCl2], cationic bis-P,P-chelate complexes [(κ(2)-P,P-L)2 M](2+), or a five-coordinate complex [(κ(2)-P,P-L)2 NiBr]Br. The electrochemical behavior of two of the nickel complexes, and their catalytic activities in electrochemical hydrogen evolution and hydrogen oxidation, including the fuel-cell test, have been studied.
authors: A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center, Arbuzov str. 8, 420088 Kazan (Russian Federation), Fax: (+7) 8432752253. elli@iopc.ru.
authors: Elvira I
authors: EI
authors: Musina
authors: Vera V
authors: VV
authors: Khrizanforova
authors: Igor D
authors: ID
authors: Strelnik
authors: Murad I
authors: MI
authors: Valitov
authors: Yulia S
authors: YS
authors: Spiridonova
authors: Dmitry B
authors: DB
authors: Krivolapov
authors: Igor A
authors: IA
authors: Litvinov
authors: Marsil K
authors: MK
authors: Kadirov
authors: Peter
authors: P
authors: Lönnecke
authors: Evamarie
authors: E
authors: Hey-Hawkins
authors: Yulia H
authors: YH
authors: Budnikova
authors: Andrey A
authors: AA
authors: Karasik
authors: Oleg G
authors: OG
authors: Sinyashin
keywords: diazadiphosphacyclooctanes; electrochemistry; hydrogen; metal complexes; pyridylphosphines