Organometallic ionic liquids from half-sandwich Ru(II) complexes with various chelating ligands
作者:Takashi Inagaki、Ken-ichi Abe、Kazuyuki Takahashi、Tomoyuki Mochida
DOI:10.1016/j.ica.2015.09.009
日期:2015.11
Salts comprising of cationic half-sandwich Ru(II) complexes with various chelating ligands and the bis (trifluoromethanesulfonyl) amide anion (Tf2N-) were prepared. These salts can be represented as [(arene) RuCl(L-L)][Tf2N] (arene = C6Me5Bu, C6Me6, p-cymene, C6H6; L-L = 2-Py-CH2NHCMe2Et, 2-Py-CH= NC6H13, H13C6NHCH2CH2NHC6H13, Me2NCH2CH2SC4H9, Me2CN=CHCH=NCMe2). Two of the eight salts are liquids at room temperature (similar to 20 degrees C), while the other salts are solids with melting points of 60-130 degrees C. Upon cooling from the melt, most salts exhibited glass transitions between -30 degrees C and -5 degrees C. The salts were found to catalyze the oxidation of cyclohexanol although decomposition occurred during the reaction. Crystal structures of related salts were also determined. (C) 2015 Elsevier B.V. All rights reserved.