STRUCTURE OF TRIS(2,6-DIMETHOXYPHENYL)PHOSPHINE

C24H27O6P, M(r) = 442.45, Pbca, orthorhombic, a = 7.615 (3), b = 20.087 (8), c = 29.447 (10) angstrom, V = 4507 angstrom 3, Z = 8, D(x) = 1.304 g cm-3, Cu K-alpha, lambda = 1.54184 angstrom, mu = 13.79 cm-1, F(000) = 1872, T = 295 K, R = 0.0568 for 3067 unique reflections. P-C bond lengths (av. = 1.844 angstrom) are slightly elongated relative to those of triphenylphosphine (av. = 1.828 angstrom). C-P-C bond angles (av. = 104.4-degrees) are only slightly larger than those of triphenylphosphine (av. = 103.0-degrees). The plane of one aromatic ring is roughly perpendicular to the plane defined by the three C atoms bound to the P atom while the other two rings are tilted.