Jm. Smith et Nj. Coville, Steric parameters of conformationally flexible ligands from X-ray structural data. 2. P(OR)(3) ligands in multiple ligand environments, ORGANOMETAL, 20(6), 2001, pp. 1210-1215
Cone (theta) and solid (Omega) angle data for the alkyl phosphite ligands P
(OR)(3) (R = Me, Et,Pr-i) were determined from structural data in the Cambr
idge Structural Database (CSD). The results for the P(OMe)(3) and P(OEt)(3)
ligands are indicative of more than one preferred cone (or solid) angle, s
uggesting that geometric measurements of steric parameters for these ligand
s need to be used with care, as is shown in the analysis of some linear fre
e energy relationships.