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Solvolytic studies of the highly crowded 1-aryl-1-phenyl-1-(trifluoromethyl)methyl bromide and tosylates

โœ Scribed by Kwang-Ting Liu; Mann-Yan Kuo

Publisher
Elsevier Science
Year
1985
Tongue
French
Weight
240 KB
Volume
26
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

In the titled system the remarkably high tosylate/bromide solvolysis rate ratio of 1.56~10~ : 1 indicates a highly strained ground state, and the reverse order of reactivity for substrate having 1-(4-trifluoromethyl)phenyl vs. that having 1-(3-trifluoromethyl)phenyl suggests the twisting of the aryl group from coplanarity in the cationic transition state.

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Spectroscopic Studies of the Keto and Enol Tautomers of 1-Phenyl-3-Methyl-4-Benzoyl-5-Pyrazolone
โœ Yoshifumi Akama; Aijun Tong ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 100 KB

Molecular structures of the two tautomers of a โค-diketone 1-phenyl-3-methyl-4-benzoyl-5pyrazolone (PMBP) were studied by MS, UV, IR, and X-ray diffraction methods. The mass spectra show little difference for the two forms of PMBP, while there are notable differences in the IR spectra as KBr pellets