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

Figure 3

Short contacts between neighboring 4′,9′,4′′,9′′-tetra-tert-butyl-1′,6′,1′′,6′′-tetramethoxy-2,5-dioxa[3.3]metabiphenylophane molecules. The red and grey ellipsoids represent O and C atoms, respectively.