Co5(CO)11(PR2)3, A Novel Type of Pentanuclear Cluster

✍ Scribed by Dipl.-Chem. Egbert Keller; Prof. Dr. Heinrich Vahrenkamp

• Publisher: John Wiley and Sons
• Year: 1977
• Tongue: English
• Weight: 241 KB
• Volume: 16
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.197707311

✦ Synopsis

Experimmtul

(+)-Cataline,( +)-( ):Asolutionof( + ) -( ) ( 1 g)in trifluoroacetic acid (TFA) is treated dropwise with stirring at -15 "C with a solution of VOF3 (0.7g) in TFA (25ml) (deep blue to red-violet coloration). The mixture is stirred for 2 h at -15 to -10°C and, after removal of the cold-bath, for a further 1 h at room temperature. The TFA is then removed at 2O0C/7O torr and the residue treated with cold aqueous NH3 solution and extracted with CHCI3. After drying over Na2S0, and removal of solvent the residue is taken up in ether and filtered. Subsequent crystallization affords 646 mg (61 %) ( + ) -( ) .