期刊
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS
卷 69, 期 -, 页码 1200-+出版社
WILEY-BLACKWELL
DOI: 10.1107/S0108270113024943
关键词
crystal structure; pyrazole derivatives; noncrystallographic symmetry; type-I C-F center dot center dot center dot F-C contacts
资金
- Fondo Nacional de Desarrollo Cientifico y Tecnologico (FONDECYT) [11100446, 1080269]
- Universidad Andres Bello [DI-27-12-R]
The title compound, C17H11F5N4O, is described and compared with two closely related analogues in the literature. There are two independent molecules in the asymmetric unit, linked by N-H center dot center dot center dot O hydrogen bonds and pi-pi interactions into dimeric entities, presenting a noticeable noncrystallographic C-2 symmetry. These dimers are in turn linked by a medium-strength type-I C-F center dot center dot center dot F-C interaction into elongated tetramers. Much weaker C-H center dot center dot center dot F contacts link the tetramers into broad two-dimensional substructures parallel to (101).
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