title: Crystal structure of diethyl 2-acet-oxy-2-[3-(4-nitro-phen-yl)-3-oxo-1-phenyl-prop-yl]malonate.
abstract: In the racemic title compound, C24H25NO9, the dihedral angle between the planes of the two benzene-ring systems is 80.16 (6)°, while the side-chain conformation is stabilized by a methyl-ene-carboxyl C-H⋯O hydrogen bond. Weak inter-molecular C-H⋯O hydrogen bonds form inversion dimers [graph set R 2 (2)(16)] which are linked into chains extending along a. Further C-H⋯O hydrogen bonding extends the structure along b through cyclic R 2 (2)(10) motifs. Although no π-π aromatic ring inter-actions are present in the structure, C-H⋯π ring inter-actions across c generate an overall three-dimensional supra-molecular structure.
authors.affiliation: Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1519 Budapest, POB 206, Hungary.
authors.forename: Nóra Veronika
authors.initials: NV
authors.lastname: May
authors.affiliation: Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1519 Budapest, POB 206, Hungary.
authors.forename: Gyula Tamás
authors.initials: GT
authors.lastname: Gál
authors.affiliation: Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1521 Budapest, POB 91, Hungary.
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Rapi
authors.affiliation: Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1521 Budapest, POB 91, Hungary.
authors.forename: Péter
authors.initials: P
authors.lastname: Bakó
keywords: C—H⋯π ring inter­actions; crown ether catalyst; crystal structure; hydrogen bonding; phase-transfer reaction; phenyl­propyl malonate