Crystal structure of butane-1,4-diyl bis-(furan-2-carboxyl-ate).

The asymmetric unit of the title compound, CHO, a monomeric compound of poly(butyl-ene 2,5-furandi-carboxyl-ate), consists of one half-mol-ecule, the whole all- mol-ecule being generated by an inversion centre. In the crystal, the mol-ecules are inter-connected C-H⋯O inter-actions, forming a mol-ecular sheet parallel to (10). The mol-ecular sheets are further linked by C-H⋯π inter-actions.