Tetra­kis(3,5-dimethoxy­phen­yl)silane

The title compound, C₃₂H₃₆O₈Si, crystallizes from CH₂Cl₂ by slow evaporation to produce a close-packed structure. In this structure, the mol­ecules have crystallographic symmetry and no guest molecules are included. In contrast, crystallization of the closely related tetra­kis(3,5-dihydroxy­phen­yl)silane from a range of solvents is directed by phenolic hydrogen bonding to yield an open diamondoid network, which is filled by a combination of inter­penetration and inclusion of guests.

Tetra­kis(2-meth­oxy-5-pyrid­yl)silane

The title compound, C₂₄H₂₄N₄O₄Si, crystallizes from propionic acid-hexane to produce a close-packed structure with no included guests. In contrast, crystallization of the closely related tetra­kis(1,2-dihydro-2-oxo-5-pyrid­yl)silane under similar conditions is directed by hydrogen bonding of the pyridinone groups to yield an open diamondoid network, which is filled by a combination of inter­penetration and inclusion of guests.