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Conformational Study of Cyclodecane and Substituted Cyclodecanes by Dynamic NMR Spectroscopy and Computational Methods
Low-temperature 13C NMR spectra of cyclodecane (1) showed the presence of a minor conformation, assigned to the twist-boat-chair-chair (TBCC), in addition to the expected boat-chair-boat (BCB). IfExpand
E and Z Conformations of Esters, Thiol Esters, and Amides
Populations and free-energy differences for the E and Z conformations of S-methyl, cyclopropyl, isopropyl, and cyclopentyl thioformate were determined by low-temperature 1H NMR spectroscopy, andExpand
Cyclotridecanone 2,4-dinitrophenylhydrazone.
TLDR
The structure, in combination with additional evidence, indicates that [337] is the preferred conformation of cyclotridecane and other simple 13-membered rings. Expand
Conformational study of cis-1,4-di-tert-butylcyclohexane by dynamic NMR spectroscopy and computational methods. Observation of chair and twist-boat conformations.
TLDR
Low-temperature 13C NMR spectra of cis-1,4-di-tert-butylcyclohexane showed signals for the twist-boats and chair and twist-boat conformations, and slow rotation of the tert- butyl groups was found. Expand
CONFORMATIONAL STUDY OF CIS-CYCLONONENE BY DYNAMIC NMR SPECTROSCOPY AND COMPUTATIONAL METHODS
The 13C NMR spectrum of the olefinic carbons of cis-cyclononene (1) at −189.3 °C showed three peaks, still exchange-broadened, which were interpreted in terms of two conformations. Relative freeExpand
DYNAMIC NMR STUDY OF TRANS-CYCLODECENE
The slow-exchange 13C spectrum of trans-cyclodecene at −154.9 °C shows eight peaks for the olefinic carbons, and these are interpreted in terms of five conformations. Three of the conformations areExpand
Conformational Study of Cyclohexene Oxide by Dynamic NMR Spectroscopy and Ab Initio Molecular Orbital Calculations
The 13C spectra of cyclohexene oxide (1) show decoalescence of the peak at lowest frequency, with slow exchange at −187.7 °C and a coalescence temperature slightly above −178.2 °C. TheExpand
Interconversion of carbon sites in boat-chair-boat cyclodecane; conformations of chlorocyclodecane and cyclodecyl acetate.
Interconversion of carbon sites in boat-chair-boat (BCB) cyclodecane occurs by way of the twist-boat-chair (TBC) conformation, which predicts that C-1 exchanges with C-4, etc. The previously obtainedExpand
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