Tricarbonyl-6,6′-dimethylfulvene chromium(0) – Structural properties

(η4-s-cis-1,3-Butadiene)tetracarbonylchromium(0)

“…A similar trend to longer Cr-C distances for the terminal carbon atoms was found for example for the s-cis-1,3-butadiene chromium(1) complex [CrCp*(C 4 H 6 )(CO)] (Betz et al 1993). As known from a few other chromium(0) complexes of s-cis-1,3-butadiene and related coordination compounds (Pavkovic & Zaluzec, 1989;Betz et al 1993;Wang et al 1990;Konietzny et al 2010)…”

“…For experimental and theoretical data for the title compound, see: Fischler et al (1976); Kotzian et al (1982); Kreiter & Ö zkar (1978); Okamoto et al (1991); von Ragué Schleyer et al (2000). For related chromium complexes, see: Pavkovic & Zaluzec (1989), Betz et al (1993), Wang et al (1990), Konietzny et al (2010). For related s-cis-butadiene complexes, see: Reiss (2010), Reiss & Konietzny (2002).…”

Crystal structure of tricarbonyl(η2:2:1-1,2,3,11-tetramethyl-9-(2'-buten-2'- yl)tricyclo[5.3.1.04,10]undeca-2,5-dien-11-yl)manganese, C22H27MnO3

“…The photochemical reactions of transition metal complexes with olefinic ligands have been extensively studied [5][6][7][8].T he exact understanding of the bonding schemes of olefinic ligands in transition metal complexes is still in the focus of our interest [9][10][11][12][13][14]. The asymmetric unit of the title structure consists of one complete complex ( Fig.…”

Crystal structure of the formal 20 electron zirconocene pentafulvene complex Cp2Zr(η5,η1-adamantylidenepentafulvene):toluene:n-hexane = 1:0.125:0.125

“…Over the last few decades, pentafulvenes have found plenty of applications in organometallic chemistry (Preethalayam et al, 2017;Neuenschwander, 1989), one of which is their use as versatile ligands for a variety of early and late transition metals featuring a multitude of coordination modes and reactivity patterns (Preethalayam et al, 2017;Kreindlin & Rybinskaya, 2004). Whereas for late transition metals 2 -and 4 -bindng modes are known (Kim et al, 2000;Rais & Bergman, 2004), most metals are bound in an 6 -manner, either in a neutral olefinic 2 : 2 : 2 (Konietzny et al, 2010) or in a dianionic 5 : 1 fashion (Ebert et al, 2014). The change of polarity at the exocyclic carbon atom of the pentafulvene ligand, resulting from its bonding to the central metal atom, enables a multitude of insertion reactions and C-H-activation reactions that are of great interest to our research group (Ebert et al, 2014;Manssen et al, 2015Manssen et al, , 2017Oswald et al, 2016) .…”