European Journal of Chemistry 2017, 8(1), 20-24. doi:10.5155/eurjchem.8.1.20-24.1530

Crystal structure of 7-methoxy-1-{[(E)-2,6-dimethylphenylimino] (phenyl)methyl}-2-naphthol: Clarification of non-covalent bonding interactions on the basis of spatial organization of single molecular structure and the molecular alignments


Kazuki Ogata (1) , Atsushi Nagasawa (2) , Noriyuki Yonezawa (3) , Akiko Okamoto (4,*)

(1) Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Tokyo, 184-8588, Japan
(2) Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Tokyo, 184-8588, Japan
(3) Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Tokyo, 184-8588, Japangy
(4) Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Tokyo, 184-8588, Japan
(*) Corresponding Author

Received: 28 Dec 2016, Accepted: 19 Jan 2017, Published: 31 Mar 2017

Abstract


Crystal structure of the title compound, 7-methoxy-1-{[(E)-2,6-dimethylphenylimino] (phenyl)methyl}-2-naphthol, which has N-aryl group instead of ketonic carbonyl group has been comparatively analysed with the precursor compound of 1-benzoyl-2-hydroxy-7-methoxynaphthalene. The distinct features in the molecular accumulation structures of title triarylimine compound and the precursor diaryl ketone demonstrate that the spatial organization of the former is mainly determined π-π stacking interaction and for the latter the non-classical hydrogen bondings govern the spatial organization. Besides both of the compounds show non-coplanaryl accumulation of aromatic rings molecular structure, the title compound has molecular core of imino group which attaches three aromatic rings of C-1-naphthyl, C-phenyl, and N-phenyl stems of nearly perpendicular alignment of each aryl groups to residual two aryl ones respectively, giving highly congested circumstance at the inner site of molecules. On the other hand, the precursor aromatic ketone molecule has relatively large space compared to title compound, enabling conformational flexibility to some extent within restriction of maintaining non-coplanar organization. The molecules of the precursor compound in crystal are stabilized by a number of non-covalent bonding interactions, mainly by non-classical hydrogen bondings. The achievement stabilization contributed a number of non-classical hydrogen bonding is considered to be due to the inner-molecular motility of single molecular structure. Contrarily, the congested inner-molecular situation of title compound makes largely rigid molecular conformation, which affords at the same time exposure of three aromatic planes outside the molecular core. The single molecular organization permits π-π stacking interaction stabilization instead of formation of a number of weak interactions. Thus, the governing factors for the distinct feature of the single molecular and the accumulation structures of title compound and the precursor are interpreted from the viewpoint of predominantly effective intermolecular interaction, a strong π-π stacking interaction or sum of weak non-classical hydrogen bondings, determined by the inner-molecular congestive conditions directly affects the inner-molecular motility.


Keywords


Hydrogen bonds; Crystal structure; Crystal engineering; Stacking interactions; Noncovalent interactions; X-ray single crystal structure

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DOI: 10.5155/eurjchem.8.1.20-24.1530

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Citations

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[1]. Takeshi Yokoyama, Takahiro Mido, Genta Takahara, Kazuki Ogata, Elżbieta Chwojnowska, Noriyuki Yonezawa, Akiko Okamoto
Crystal structure of 1-benzoyl-2,7-dimethoxy-8-(3,5-dimethylbenzoyl) naphthalene: Head-to-head fashioned molecular motif for accumulating weak non-classical hydrogen bonds
European Journal of Chemistry  8(2), 188, 2017
DOI: 10.5155/eurjchem.8.2.188-194.1572
/


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How to cite


Ogata, K.; Nagasawa, A.; Yonezawa, N.; Okamoto, A. Eur. J. Chem. 2017, 8(1), 20-24. doi:10.5155/eurjchem.8.1.20-24.1530
Ogata, K.; Nagasawa, A.; Yonezawa, N.; Okamoto, A. Crystal structure of 7-methoxy-1-{[(E)-2,6-dimethylphenylimino] (phenyl)methyl}-2-naphthol: Clarification of non-covalent bonding interactions on the basis of spatial organization of single molecular structure and the molecular alignments. Eur. J. Chem. 2017, 8(1), 20-24. doi:10.5155/eurjchem.8.1.20-24.1530
Ogata, K., Nagasawa, A., Yonezawa, N., & Okamoto, A. (2017). Crystal structure of 7-methoxy-1-{[(E)-2,6-dimethylphenylimino] (phenyl)methyl}-2-naphthol: Clarification of non-covalent bonding interactions on the basis of spatial organization of single molecular structure and the molecular alignments. European Journal of Chemistry, 8(1), 20-24. doi:10.5155/eurjchem.8.1.20-24.1530
Ogata, Kazuki, Atsushi Nagasawa, Noriyuki Yonezawa, & Akiko Okamoto. "Crystal structure of 7-methoxy-1-{[(E)-2,6-dimethylphenylimino] (phenyl)methyl}-2-naphthol: Clarification of non-covalent bonding interactions on the basis of spatial organization of single molecular structure and the molecular alignments." European Journal of Chemistry [Online], 8.1 (2017): 20-24. Web. 22 Nov. 2019
Ogata, Kazuki, Nagasawa, Atsushi, Yonezawa, Noriyuki, AND Okamoto, Akiko. "Crystal structure of 7-methoxy-1-{[(E)-2,6-dimethylphenylimino] (phenyl)methyl}-2-naphthol: Clarification of non-covalent bonding interactions on the basis of spatial organization of single molecular structure and the molecular alignments" European Journal of Chemistry [Online], Volume 8 Number 1 (31 March 2017)

DOI Link: https://doi.org/10.5155/eurjchem.8.1.20-24.1530

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