Synthesis of C2-Symmetrical Bis-(β-Enamino-Pyran-2, 4-dione) Derivative Linked via 1, 6-Hexylene Spacer: X-ray Crystal Structures, Hishfeld Studies and DFT Calculations of Mono- and Bis-(Pyran-2, 4-diones) Derivatives. - Boraei, Ahmed T. A.; Haukka, Matti; Sarhan, Ahmed A. M.; Soliman, Saied M.; Al-Majid, Abdullah Mohammed; Barakat, Assem (Symmetry, 2021)