Pentacarbonyl(η2-vinylferrocene)metal(0) complexes of Group 6 elements: synthesis and characterization

Organometallic photochemistry at the end of its first century

“…For example, recent papers appearing in the Journal of Organometallic Chemistry have described the photochemical reaction of the Group VI carbonyls with terminal alkynes [112] and vinyl ferrocenes [113] to yield M(CO) 5 L derivatives. In an article in press as of this writing, Ö zkar and coworkers have described the synthesis and molecular structure of Cr(CO) 5 (2,5-diaminopyridine), Fig.…”

Synthesis and Reactivity of Group 6 Metal Carbonyl Complexes with Bis(pyrazol‐1‐yl)methanes Modified by the Vinyltin Groups

“…3 On the other hand, group 6 metal carbonyl complexes with the olefinic ligand have attracted considerable attention in the past few decades due to their wide applications to organometallic and catalytic chemistry. [6][7][8][9][10] The carbon-carbon double bond in these complexes displays high reactivity to various electrophilic and nucleophilic reagents because of the coordination of the olefin to transition metals. It is also known that organotin compounds containing unsaturated organic groups show interesting reactivities and structural features.…”

Carbonyltungsten(0) complexes of acryloylferrocene: Synthesis and characterization

“…For example, introducing the ferrocenyl group into an olefin ligand is expected to influence the stability and catalytic properties of its complexes with the transition metal. Vinylferrocene has already been employed as an olefin ligand containing a ferrocenyl unit [9]. However, Group 6 metal carbonyl complexes of the type M(CO) 5 (g 2 -vinylferrocene) have been found to be unstable [9].…”

“…Vinylferrocene has already been employed as an olefin ligand containing a ferrocenyl unit [9]. However, Group 6 metal carbonyl complexes of the type M(CO) 5 (g 2 -vinylferrocene) have been found to be unstable [9]. Another potential olefinic ligand containing a ferrocenyl substituent is acryloylferrocene which has been recently isolated [10].…”

“…Indeed, with a few exceptions, trans-M(CO) 4 (g 2 -olefin) 2 is always found to be the final product of the photosubstitution of CO in the Group 6 metal carbonyls in the presence of excess olefin. In the case of tetracyanoethene [23] and Z-cyclooctene with chromium [20], and vinylferrocene with all three metals [9], the photosubstitution stops at the first step, forming M(CO) 5 (g 2 -olefin). Here, we report the photolysis of hexacarbonyltungsten(0) in the presence of acryloylferrocene (acfc).…”