Bis­(tri­phenyl­silyl) phenyl­phospho­nate

In the structure of the title monomeric phosphorosilicate, C₄₂H₃₅O₃PSi₂ or PhP(=O)(OSiPh₃)₂, there are notable differences in the chemically equivalent P^V—O—Si angles [141.59 (16) and 152.38 (18)°] and the two P—O(—Si) distances [1.546 (3) and 1.566 (3) Å]. There is also a significant C—H...O=P hydrogen bond which links mol­ecules into extended chains along [100].

Tris­(tri­phenyl­silyl)­phosphate di­chloro­methane solvate

The structure of the title monomeric phospho­silicate, C₅₄H₄₅O₄PSi₃·0.263CH₂Cl₂ or (Ph₃SiO)₃PO·0.263CH₂Cl₂, is reported and is the first of a phospho­siloxane mol­ecule with the general formula (R₃SiO)₃PO. Although the three P^V-O-Si angles are remarkably similar [143.57 (16), 144.47 (15) and 144.71 (15)°], the three P-O(Si) distances are remarkably different at 1.544 (2), 1.554 (2) and 1.561 (2) Å.