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Three closely related (2E,2'E)-3,3'-(1,4-phenyl-ene)bis-[1-(meth-oxy-phen-yl)prop-2-en-1-ones]: supra-molecular assemblies in one dimension mediated by hydrogen bonding and C-H?? inter-actions.

ABSTRACT: In the title compounds, (2E,2'E)-3,3'-(1,4-phenyl-ene)bis-[1-(2-meth-oxy-phen-yl)prop-2-en-1-one], C26H22O4 (I), (2E,2'E)-3,3'-(1,4-phenyl-ene)bis-[1-(3-meth-oxy-phen-yl)prop-2-en-1-one], C26H22O4 (II) and (2E,2'E)-3,3'-(1,4-phenyl-ene)bis-[1-(3,4-di-meth-oxy-phen-yl)prop-2-en-1-one], C28H26O6 (III), the asymmetric unit consists of a half-mol-ecule, completed by crystallographic inversion symmetry. The dihedral angles between the central and terminal benzene rings are 56.98?(8), 7.74?(7) and 7.73?(7)° for (I), (II) and (III), respectively. In the crystal of (I), mol-ecules are linked by pairs of C-H?? inter-actions into chains running parallel to [101]. The packing for (II) and (III), features inversion dimers linked by pairs of C-H?O hydrogen bonds, forming R22(16) and R22(14) ring motifs, respectively, as parts of [201] and [101] chains, respectively.

SUBMITTER: Sim A 

PROVIDER: S-EPMC5458319 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Three closely related (2<i>E</i>,2'<i>E</i>)-3,3'-(1,4-phenyl-ene)bis-[1-(meth-oxy-phen-yl)prop-2-en-1-ones]: supra-molecular assemblies in one dimension mediated by hydrogen bonding and C-H⋯π inter-actions.

Sim Aijia A   Chidan Kumar C S CS   Kwong Huey Chong HC   Then Li Yee LY   Win Yip-Foo YF   Quah Ching Kheng CK   Naveen S S   Chandraju S S   Lokanath N K NK   Warad Ismail I  

Acta crystallographica. Section E, Crystallographic communications 20170526 Pt 6

In the title compounds, (2<i>E</i>,2'<i>E</i>)-3,3'-(1,4-phenyl-ene)bis-[1-(2-meth-oxy-phen-yl)prop-2-en-1-one], C<sub>26</sub>H<sub>22</sub>O<sub>4</sub> (I), (2<i>E</i>,2'<i>E</i>)-3,3'-(1,4-phenyl-ene)bis-[1-(3-meth-oxy-phen-yl)prop-2-en-1-one], C<sub>26</sub>H<sub>22</sub>O<sub>4</sub> (II) and (2<i>E</i>,2'<i>E</i>)-3,3'-(1,4-phenyl-ene)bis-[1-(3,4-di-meth-oxy-phen-yl)prop-2-en-1-one], C<sub>28</sub>H<sub>26</sub>O<sub>6</sub> (III), the asymmetric unit consists of a half-mol-ecule, complet  ...[more]

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