Infrared Spectroscopic Evidence for New Metal Carbonyl Complexes with Aromatic Ligands

Transition Metal Complexes of Chromium, Molybdenum, Tungsten, and Manganese Containing η1(S)-2,5-Dimethylthiophene, Benzothiophene, and Dibenzothiophene Ligands

“…Tungsten-thiophene complexes previously reported include W(PCy 3 ) 2 (CO) 3 (η 1 (S)-T) 17 and (CO) 5 W(η 1 (S)-T). 18 Both presumably have η 1 (S)coordinated thiophene ligands which are largely dissociated in solution. The former was fully characterized spectroscopically, while the latter was identified only by IR spectroscopy.…”

Filling a Niche in “Ligand Space” with Bulky, Electron‐Poor Phosphorus(III) Alkoxides

“…In order to assess the electronic properties of these ligands via experimental measurements, tungsten and rhodium carbonyl complexes of 1 – 6 were prepared. Tungsten carbonyl complexes of the form [W(CO) 5 L], where L= 1 – 6 were prepared by reaction of [W(CO) 5 (THF)] with the relevant ligand in tetrahydrofuran (THF) solution . The 31 P{ 1 H} NMR spectroscopic data for these complexes in THF, along with the carbonyl IR stretching frequencies (solution phase in THF/hexane) are summarized in Table .…”

“…Tungstenc arbonyl complexes of the form [W(CO) 5 L],w here L = 1-6 were prepared by reaction of [W(CO) 5 (THF)] with the relevant ligand in tetrahydrofuran (THF) solution. [20] The 31 P{ 1 H} NMR spectroscopic data for these complexes in THF,a long with the carbonyl IR stretching frequencies (solution phase in THF/hexane) are summarized in Ta ble3.F our of these complexes were amenablet o purification by sublimation (to removee xcess [W(CO) 6 ]p resent in the crude products). However,c omplexesi nvolving ligands 4 and 5 consistently decomposed under these conditions.…”

Bis (η2-olefin) tetracarbonylwolfram- und -molybdän-Komplexe: photochemische Synthese, Struktur und dynamisches Verhalten / Bin (η2-olefin)tetracarbonyltungsten and -molybdenum Complexes: Photochemical Synthesis, Structure and Fluxional Behaviour

“…Die Veränderungen der in Tetrahydrofuran aufgenommenen IR-Spektren zeigen, daß das Olefin verdrängt und (THF)W(CO)5 [19] gebildet wird. Deshalb führt der Weg über das (THF)W(CO)5 mit anschließendem Ligandenaustausch, eine bei der Darstellung zahlreicher (w-Donor)W(CO)5-Komplexe bewährte Methode, bei der Synthese des (*7 2 -01efin)W(C0)5 nicht zum Ziel.…”