Tris(2-methoxyphenyl)phosphine

Abstract

In the title compound, C21H21O3P, the whole mol­ecule is disordered over two sets of positions with refined occupancies of 0.503 (1) and 0.497 (1). The dihedral angles between the three benzene rings are 72.9 (2)°, 82.9 (3)° and 70.0 (2)° in the major disorder component and the corresponding angles in the minor disorder component are 85.0 (2)°, 79.2 (2)° and 72.3 (2)°. The crystal structure is stabilized by C—H⋯π inter­actions.

A redetermination of (2-methoxyphenyl)diphenylphosphine

“…Molecule B/C are the major/minor components of the whole-molecule disorder over two positions with refined occupancies of 0.753 (3) and 0.247 (3) respectively. The P-C bond lengths and C-P-C angles for the asymmetric unit are comparable to the related structures (Dunne & Orpen, 1991;Suomalainen et al, 2000;Shawkataly et al, 2009). The dihedral angles between the three benzene rings [C1A-C6A/C7A-C12A, C1A-C6A/C13A-C18A and C7A-C13A/C13A-C18A] are 89.69 (7), 76.54 (7) and 86.02 (7)° in molecule A and the corresponding angles for major B and minor C components of the whole-molecule are 88.3 (4), 83.2 (4), 84.2 (3)° and 80.2 (11), 89.5 (11), 74.4 (9)°, respectively.…”

“…For a previous report of this molecule, see: Suomalainen et al (2000). For P-C bond lengths and C-P-C angles in related structures, see: Dunne & Orpen (1991); Shawkataly et al (2009). For the stereochemistry of 2-methoxyphenyl diphenylphosphine complexes, see: Dahlenburg et al (1997); Moreno et al (2005).…”