Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 938, Issue 1-3, Pages 311-315Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2009.10.001
Keywords
3,5-Diaryl-1H-pyrazoles; 1,3-Diketones; Synthesis; Crystal structure; Hydrogen bonds
Categories
Funding
- Educational Commission of Hubei Province, PR China [Q200822002]
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Seven new 3,5-diaryl-1H-pyrazoles were synthesized by the condensation of 1,3-diketones with hydrazine in ethanol, and characterized The crystal structures for 3(5)-(4-tert-butylphenyl)-5(3)-(4-fluorphenyl)-1H-pyrazole (5) and 3-(4-tert-butylphenyl)-5-(6-methoxy-naphthalen-2-yl)-1H-pyrazole (7) have been determined by X-ray crystal structure analysis. The N-H N intermolecular hydrogen bonds join the molecules into dimers. The NH proton of 5 is disordered, and its dimer is formed by the tautomers 5a5b or 5b5a Compound 7 only exists as a 7a tautomer, and its dimer consists of the tautomers 7a7a (C) 2009 Elsevier B V All rights reserved
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