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Novel macrocyclic uracil derivatives: Structure in solid and solution |
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| Authors: | Vyacheslav Semenov Aidar Gubaidullin Olga Kataeva Olga Lodochnikova Alina Timosheva Vladimir Kataev Rashit Giniyatullin Anton Nikolaev Alla Chernova Roald Shagidullin Adilya Nafikova Vladimir Reznik |
| Institution: | (1) A.E. Arbuzov Institute of Organic and Physical Chemistry of the Russian Academy of Sciences, A.E. Arbuzov str. 8, Kazan, 420088, Russia |
| Abstract: | Isomeric pyrimidinophanes containing uracil moieties and nitrogen atoms in bridges have been synthesized and characterized by a variety of methods both in solid and in solution. Unambiguous assignment of mutual arrangement of C(4)pyrO groups at different pyrimidine rings in isomers is made by X-ray diffraction. In solutions the arrangement of C(4)pyrO groups of the isomeric pyrimidinophanes results in different dipole moments. Based on dipole moments simulations mutual orientation of uracil units in isomers is analysed. UV-data are discussed in terms of hypo- or hyperchromic effect. |
| Keywords: | 6-methyluracil Pyrimidinophanes Isomers Crystal structure Dipole moments Hypochromism |
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