Peculiar orientational disorder in 4-bromo-4′-nitrobiphenyl (BNBP) and 4-bromo-4′-cyanobiphenyl (BCNBP) leading to bipolar crystals

Autor: Matthias Burgener, Hanane Aboulfadl, Gaël Charles Labat, Michel Bonin, Martin Sommer, Ravish Sankolli, Michael Wübbenhorst, Jürg Hulliger

Publikováno v: IUCrJ, Vol 3, Iss 3, Pp 219-225 (2016)

180° orientational disorder of molecular building blocks can lead to a peculiar spatial distribution of polar properties in molecular crystals. Here we present two examples [4-bromo-4′-nitrobiphenyl (BNBP) and 4-bromo-4′-cyanobiphenyl (BCNBP)] w

Externí odkaz: https://doaj.org/article/fa92f7f5d82d4d9ebad4466fdc571692

Chiral gels derived from secondary ammonium salts of (1R,3S)-(+)-camphoric acid

Autor: Tapas Kumar Adalder, N. N. Adarsh, Ravish Sankolli, Parthasarathi Dastidar

Publikováno v: Beilstein Journal of Organic Chemistry, Vol 6, Iss 1, Pp 848-858 (2010)

In order to have access to chiral gels, a series of salts derived from (1R,3S)-(+)-camphoric acid and various secondary amines were prepared based on supramolecular synthon rationale. Out of seven salts prepared, two showed moderate gelation abilitie

Externí odkaz: https://doaj.org/article/3fb00921e04b4f588b8ac8371c813e63

(2E)-1-(5-Chlorothiophen-2-yl)-3-(2,3-dimethoxyphenyl)prop-2-en-1-one

Autor: V. Upadhyaya, T. N. Guru Row, Ravish Sankolli, A. Jayarama, A. N. Prabhu

Publikováno v: Acta Crystallographica Section E, Vol 67, Iss 10, Pp o2665-o2665 (2011)

In the title compound, C15H13ClO3S, the chlorothiophene and dimethoxyphenyl groups are linked by a prop-2-en-1-one group. The C=C double bond exhibits an E conformation. The molecule is non-planar, with a dihedral angle of 31.12 (5)° between the chl

Externí odkaz: https://doaj.org/article/039f53d567f849e2ab608d60e9ee9f38

4-Hydroxy-6-(4-methoxyphenyl)-4-phenyl-1,3-diazinane-2-thione

Autor: H. C. Devarajegowda, K. R. Roopashree, Irfan Ali Mohammed, Mahalakshmi, Ravish Sankolli

Publikováno v: Acta Crystallographica Section E, Vol 67, Iss 4, Pp o815-o815 (2011)

In the title compound, C17H18N2O2S, the 1,3-diazinane-2-thione ring system is not coplanar with the benzene ring and methoxyphenyl ring system, the dihedral angle between the planes being 65.58 (13) and 89.18 (10)°, respectively. The crystal structu

Externí odkaz: https://doaj.org/article/4859e08588bc435daae999856914de9a

Peculiar orientational disorder in 4-bromo-4'-nitrobiphenyl (BNBP) and 4-bromo-4'cyanobiphenyl (BCNBP) leading to bipolar crystals

Autor: Hanane Aboulfadl, Ravish Sankolli, Matthias Burgener, Jürg Hulliger, Michel Bonin, Gaël Labat, Martin Sommer, Michael Wübbenhorst

Publikováno v: IUCr Journals
IUCrJ
Burgener, Matthias; Oulevey, Hanane; Labat, Gaël Charles; Bonin, Michel; Sommer, Martin; Sankolli, Ravish; Wübbenhorst, Michael; Hulliger, Jürg (2016). Peculiar orientational disorder in 4-bromo-4′-nitrobiphenyl (BNBP) and 4-bromo-4′-cyanobiphenyl (BCNBP) leading to bipolar crystals. IUCrJ, 3(3), pp. 219-225. International Union of Crystallography 10.1107/S2052252516006709
IUCrJ, Vol 3, Iss 3, Pp 219-225 (2016)

Two dipolar biphenyls show significant 180° orientational disorder resulting in bipolar as-grown crystals. An added symmetrical biphenyl interferes with polarity formation and inverts the initial bipolar state.
180° orientational disorder of m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cce16a82819518793d572f44818033a5