Spectroscopic analysis of (1-α,2-α′: η4-quinodimethane)tris(trimethylphosphine)ruthenium(0)

✍ Scribed by Nigel J. Simpson; Raymond K. Mackie; David J. Cole-Hamilton

• Book ID: 102527542
• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 335 KB
• Volume: 28
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260280608

✦ Synopsis

Abstract

The ^1^H, ^13^C and ^31^P NMR spectra of [Ru(CH~2~C~6~H~4~CH~2~)(PMe~3~)~3~], which contains a coordinated o‐xylidene moiety, have been analysed. Parameters such as the geminal coupling in the methylene groups, P,H couplings and the chemical shifts of the quaternary ring carbon atoms all point to a metal‐o‐xylidene binding that is intermediate between σ^2^,π and π2. Spectral assignment is assisted by P‐H correlation spectroscopy using the COLOC sequence. The best parameter for identifying the bonding mode is the chemical shift for the quaternary aromatic carbon atoms.