Grinev VS, Mayorova OA, Anis’kova TV, Tikhomolova AS, Yegorova AY. Structure,
Z' = 2 Crystal Packing Features of 3-(2-Chlorobenzylidene)-5-(
p-tolyl)furan-2(3
H)-one.
Molecules 2021;
26:2137. [PMID:
33917731 PMCID:
PMC8068103 DOI:
10.3390/molecules26082137]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/03/2021] [Accepted: 04/06/2021] [Indexed: 11/23/2022] Open
Abstract
3-(2-Chlorobenzylidene)-5-(p-tolyl)furan-2(3H)-one (1), C18H13ClO2, crystallizes with Z = 8 and Z' = 2, and the structure at 100 K has orthorhombic (Pna21) symmetry. Each kind of molecule takes part in π-π stacking interactions to form infinite chains parallel to the c axis. We believe that the existence of two forms can be explained by the probable rotation around a single C-C bond. The quantum chemical modeling reveals that these molecules are almost equivalent energetically, and they can be described as the two most stable conformers (rotamers) with a minor rotational barrier of about 0.67 kcal/mol.
Collapse