Voronova Eugenia D, Golovanov Alexander A, Odin Ivan S, Anisimov Maksim A, Dorovatovskii Pavel V, Zubavichus Yan V, Vologzhanina Anna V
A. N. Nesmeyanov Institute of Organoelement Compounds RAS, 28 Vavilova str., Moscow 119991, Russian Federation.
Togliatti State University, 14 Belorusskaya str., Togliatti 445667, Russian Federation.
Acta Crystallogr C Struct Chem. 2018 Dec 1;74(Pt 12):1674-1683. doi: 10.1107/S2053229618015838. Epub 2018 Nov 21.
1,5-Diaryl(heteroaryl)pentenynones show a tendency to crystallize in acentric space groups due to their inclination to form C-H...O hydrogen-bonded chains instead of dimers and thus exhibit nonlinear optical properties. A series of symmetrical α,α'-bis(3-arylprop-2-yn-1-ylidene)cycloalkanones and unsymmetrical α-(furan-2-ylmethylene)-α'-(3-arylprop-2-yn-1-ylidene)cyclohexanones closely related to pentenynones was synthesized, namely 2,5-bis(3-phenylprop-2-yn-1-ylidene)cyclopentanone, CHO, 2,5-bis[3-(4-bromophenyl)prop-2-yn-1-ylidene]cyclopentanone, CHBrO, 2,6-bis(3-phenylprop-2-yn-1-ylidene)cyclohexanone, CHO, 2,6-bis[3-(4-bromophenyl)prop-2-yn-1-ylidene]cyclohexanone, CHBrO, 4-tert-butyl-2,6-bis(3-phenylprop-2-yn-1-ylidene)cyclohexanone, CHO, 4-tert-butyl-2,6-bis[3-(4-methylphenyl)prop-2-yn-1-ylidene]cyclohexanone, CHO, 2-(furan-2-ylmethylene)-6-(3-phenylprop-2-yn-1-ylidene)cyclohexanone, CHO, and 6-(3-butylprop-2-yn-1-ylidene)-2-(furan-2-ylmethylene)cyclohexanone, CHO, and investigated by means of X-ray diffraction to understand peculiarities of their supramolecular organization. Four of the eight novel compounds crystallize in acentric space groups. Three of these four compounds contain substituents at the para position of the phenyl ring, which affect the charge density on the H(C) atoms and thus stabilize C-H...O interactions. The fourth compound realizes the C-H...O hydrogen bonding via H atoms of the furyl ring. The applicability and shortcomings of the Full Interaction Map tool to predict the likelihood of C-H...O and C-H...Br hydrogen-bonded motifs, and the effect of substituents on the phenyl ring on the supramolecular architecture are discussed.
