The title compound, C 23 H 23 FN 3 O 2 has been synthesized and the structure was investigated by X-ray diffraction studies. The compound crystallizes in the triclinic crystal class in the space group P1 with cell parameters a = 9.345(2) Å , b = 10.940(3) Å , c = 11.986(4) Å , a = 72.349(6)°, b = 68.106(18)°, c = 66.867(5)°, Z = 2 and V = 1027.8(5) Å 3 . The hydantoin ring adopts a planar conformation and is affected by the p conjugation. The pyrrolidine and piperidine rings in the bicyclo octane moiety adopt envelope and chair conformations respectively. The structure exhibits both inter and intramolecular hydrogen bonds of the type N-HÁÁÁO, C-HÁÁÁO and C-HÁÁÁN. One of the oxygen atoms attached to the hydantoin ring simultaneously accepts two hydrogen bonds to form a three centered hydrogen bonding pattern.
In the title chalcone derivative, C15H9Cl2FO, the dihedral angle between the aromatic rings is 19.13 (15)° and the double bond adopts anEconformation. In the crystal, molecules are connected by weak C—H...O hydrogen bonds, forming a chain propagating along the [001] direction.
The molecule of the title compound C19H18O6, adopts anEconformation about the C=C double bond and the C—C=C—C torsion angle is −179.30 (16)°. The molecule is nearly planar, as indicated by the dihedral angle of 6.99 (6)° between the benzene ring and the benzodioxalane ring. In the crystal, molecules are linkedviaweak C—H...O hydrogen bonds, forming zigzag chains propagating along thebaxis.
The use of chlorofluorocarbon based refrigerants in the air-conditioning system increases the global warming and causes the climate change. The climate change is expected to present a number of challenges for the built environment and an evaporative cooling system is one of the simplest and environmentally friendly cooling system. The evaporative cooling system is most widely used in summer and in rural and urban areas of India for human comfort. In evaporative cooling system, the addition of water into air reduces the temperature of the air as the energy needed to evaporate the water is taken from the air. Computational fluid dynamics is a numerical analysis and was used to analyse the evaporative cooling system. The CFD results are matches with the experimental results.
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