Crystal structures of 2,5-di­azido-1,4-phenyl­ene di­acetate and 2,5-di­azido-1,4-phenyl­ene dibutyrate

2,5-Di­azido-1,4-phenyl­ene di­acetate and dibutyrate are the first structurally characterized representatives with a trans-di­azido­phenyl­ene entity. Both mol­ecules possess inversion symmetry; however, the compounds crystallize in different crystal systems (triclinic versus monoclinic).

Crystal structure of trans-1,4-bis­[(tri­methyl­sil­yl)­oxy]cyclo­hexa-2,5-diene-1,4-dicarbo­nitrile

The mol­ecular structure of the title compound is centrosymmetric. The cyclo­hexa-2,5-diene moiety is exactly planar and has a bond-length distribution characteristic for one pair of double bonds and two pairs of single bonds.