Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
64 0 |
SM ISO690:2012 FONARI, Marina, SIMONOV, Yurii A., CHUMAKOV, Yurii, BOCHELLI, G., GANIN, Edward, YAVOLOVSKII, Arkadii. The Dihydropyrimidine-2,4-(1H,3H)-dione Functionality: A Suitable Module for Novel Crown-containing Hydrogen-bonded Supramolecular Assemblies. In: Supramolecular Chemistry, 2004, vol. 16, pp. 23-30. ISSN 1061-0278. DOI: https://doi.org/10.1080/1061027031000150580 |
EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
Supramolecular Chemistry | |
Volumul 16 / 2004 / ISSN 1061-0278 /ISSNe 1029-0478 | |
|
|
DOI:https://doi.org/10.1080/1061027031000150580 | |
Pag. 23-30 | |
Descarcă PDF | |
Rezumat | |
Two novel pyrimidine derivatives, 2-(2-methylphenyl)-2H-[1,2,3]triazolo[4, 5-d]pyrimidine-5,7(4H,6H)-dione 3-oxide (H-PD) and 6-amino-2,4-dioxo-1,2,3,4- tetrahydropyrimidin-5-ylsulfamic acid (H-PS), were synthesized and investigated as suitable ligands for co-crystallization with 1,10-diaza-18-crown-6 (DA18C6). Two solid compounds formulated as [(H2DA18C6)(PD)2(H 2O)4] (1) and [(H2DA18C6)(PS) 2(H2O)2] (2) have been shown by single-crystal structural analysis to be 2D and 3D networks, respectively, through extensive H-bonding intermolecular interactions. Both 1 and 2 incorporate the diaza-18-crown-6 units in the form of macrocyclic cations. In 1 the (PD) - anions deprotonated in the fourth position of the pyrimidine ring and water molecules are combined into 2D anionic sheets, the macrocyclic cations occupying the cavities in these sheets. In 2 the ensemble of donor and acceptor binding sites available in the 6-amino-2,4-dioxo-1,2,3,4- tetrahydropyrimidin-5-ylsulfamate anions (PS)- facilitates their self-assembly into a double layer via diverse hydrogen bonds. Water molecules and H2-1,10-diazonia-18-crown-6 cations bridge the neighboring layers thus providing the final 3D supramolecular architecture. |
|
Cuvinte-cheie Crown spacer, Hydrogen bonding, Pyrimidine derivatives, Self-Assembly |
|
|