Synthesis and X-ray structure of ruthenium bis(acetylacetonate)(N,N,N′,N′-tetramethylethylenediamine)

Abstract

Although several ruthenium complexes of the type Ru(acac)(2)(L)(x), where x is 1 for a bidentate or 2 for a monodentate ligand, are known, the tmed complex is conspicuously absent. This article describes the synthesis of this complex from trans-RuCl(2)(tmed)(2), acetylacetone, and triethylamine in toluene. A new synthesis of trans-RuCl(2)(tmed)(2) is also described. Some physical properties and the X-ray crystal structure of Ru(acac)(2)(tmed) are provided.

Syntheses and crystal structures of three [M(acac)2(TMEDA)] complexes (M = Mn, Fe and Zn)

“…A similar effect was observed for [Co(acac) 2 (TMEDA)] (Pasko et al, 2004). In the case of the Mn and Zn complexes 1 and 3, the trans influence is negligible as reported for [Ni(acac) 2 (TMEDA)] (Trimmel et al, 2002) and [Ru(acac) 2 (TMEDA)] (Halbach et al, 2012). A reverse effect with a shortening of the Zn-O bonds trans to nitrogen was detected for [Zn(acac) 2 (2,2 0 -bipyridine)] and [Zn(acac) 2 (1,10-phenanthroline)] (Brahma et al, 2008).…”

“…5). , 2004;Halbach et al, 2012). However, none of these complexes is isotypic with the three title compounds.…”

“…The crystal structures of mixed complexes [M(acac) 2 (TMEDA)] (TMEDA = N,N,N 0 ,N 0 -tetramethylethylenediamine) containing both types of ligands have been reported for several divalent metals, e.g. M = V (Ma et al, 1999), Co (Pasko et al, 2004), Ni (Trimmel et al, 2002;Zeller et al, 2004) and Ru (Halbach et al, 2012). The synthesis of [Zn(acac) 2 (TMEDA)] was reported recently in conjunction with the Ru derivative but without crystal structure determination (Halbach et al, 2012).…”

“…M = V (Ma et al, 1999), Co (Pasko et al, 2004), Ni (Trimmel et al, 2002;Zeller et al, 2004) and Ru (Halbach et al, 2012). The synthesis of [Zn(acac) 2 (TMEDA)] was reported recently in conjunction with the Ru derivative but without crystal structure determination (Halbach et al, 2012). Typically, [M(acac) 2 (TMEDA)] complexes are used as valuable starting materials for the preparation of organometallic and coordination compounds (Kaschube et al 1988;Nelkenbaum et al, 2005;Albrecht et al, 2019).…”