Preparation and properties of fluorenylidenephosphines bearing an electron-donating substituent, 2-alkoxy-4,6-di-t-butylphenyl or 2-(alkoxymethyl)-4,6-di-t-butylphenyl

✍ Scribed by Kozo Toyota; Subaru Kawasaki; Masaaki Yoshifuji

• Publisher: Elsevier Science
• Year: 2002
• Tongue: French
• Weight: 226 KB
• Volume: 43
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(02)01860-9

✦ Synopsis

Fluorenylidenephosphines having a 2,4-di-t-butyl-6-methoxyphenyl, 2,4-di-t-butyl-6-(methoxymethyl)phenyl or 2,4-dit-butyl-6-(phenoxymethyl)phenyl group were prepared. 31 P NMR chemical shifts of the fluorenylidenephosphines indicated that electron-donating effects through space are not so strong between the alkoxy group and the double-bonded phosphorus atom. The structure of a tungsten carbonyl complex of 2,4-di-t-butyl-6-(phenoxymethyl)phenylphosphine was analyzed by X-ray crystallography.