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

Table 3

Short contacts (Å) between neighboring 4′,9′,4′′,9′′-tetra-tert-butyl-1′,6′,1′′,6′′-tetramethoxy-2,5-dioxa[3.3]metabiphenylophane molecules in the crystal.

C9–C	3.337(9)	H45A–H44	2.384
C9–H9	2.814	H44A–H45	2.384
H9A–C	2.814