Details

Autor(en) / Beteiligte

• Kajitani, Masatsugu
• Igarashi, Atsushi
• Hatano, Hiroshi
• Akiyama, Takeo
• Sugimori, Akira
• Matsumoto, Sachiko
• Iguchi, Yuusuke
• Boennemann, Helmut
• Shimizu, Kunio
• Satoˆ, Gen P.

Titel

Formation constants of some phosphine and phosphite adducts of (η5-cyclopentadienyl) (substituted 1,2-ethylenedichalcogenolato) cobalt(III) complexes and their 1H, 13C and 31P NMR spectra

Ist Teil von

• Journal of organometallic chemistry, 1995-01, Vol.485 (1-2), p.31-36

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

1995

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• The formation constants of the phosphine and phosphite adducts of several (η5-cyclopentadienyl) (substituted 1,2-ethylenedithiolato) cobalt(III) complexes in acetonitrile were determined spectrophotometrically. The complexes with more electron-withdrawing substituents on the ditholate ligand form more stable adducts. The NMR chemical shifts (1H, 13C and 31P) of the complexes, phosphines, phosphites and adducts were measured in CDCl3. The shifts were changed on adduct formation. These changes indicate that the phosphines act as σ-donors and the phosphites as π-acceptors and that the cobaltadithiolene ring, which is aromatic in the unbound complex, becomes olefinic in the adduct.