Synthesis and Molecular Structure of 4′,9′,4^″,9^″-Tetra-tert-butyl-1′,6′,1^″,6^″-tetramethoxy-2,5-dioxa[3.3]metabiphenylophane

Figure 2

Crystal packing of 4′,9′,4′′,9′′-tetra-tert-butyl-1′,6′,1′′,6′′-tetramethoxy-2,5-dioxa[3.3]metabiphenylophane 3. Red and grey ellipsoids represent O and C atoms, respectively. All hydrogen atoms are omitted for clarity.