Syntheses and characterization of new tertiary phosphane ligands prepared from p-anisyl- and p-thioanisyldichlorophosphanes

The syntheses and spectroscopic parameters of the new tertiary phosphane li gands (p-MeOC6H4)(o-MeOC6H4)(2)P (1), (p-MeOC6H4)(o-MeSC6H4)(2)P (2), (p-Me SC6H4) (o-MeSC6H4)(2)P (3), (p-MeSC6H4)(o-MeOC6H4)(2)P (4), (P-MeOC6H4)(o-N C5-H-4)(2)P (5), and (p-MeSC6H4)(o-NC5H4)(2)P (6) are reported. Single-crys tal X-ray structures of all the compounds (1-6) have been determined. The d ependence of the P-31-NMR chemical shifts on the substituent groups of the phosphanes is discussed.