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- W2054583090 abstract "The barriers for three internal motions (i.e., phenyl and tert-butyl rotation as well as N-inversion) have been determined by dynamic NMR spectroscopy in the two diastereoisomeric forms of a typical amino alcohol [dimethylamino-2,4,4-trimethyl-3-phenyl-3-pentanol, Me(2)NCH(2)CHMeC(OH)PhBu(t)]. The two structures were assigned by connection with those of the corresponding amide precursors determined by single-crystal X-ray diffraction. These amides (C=O in place of CH(2)) too were found to undertake internal motions amenable to NMR observation, i.e., phenyl, tert-butyl, and N-CO rotations: the corresponding barriers were also measured. Ab initio computations indicate that H-bonding makes all these molecules adopt six-membered cyclic conformations, a conclusion which agrees well with the X-ray crystal structure determined for the amide precursors." @default.
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- W2054583090 date "2002-03-23" @default.
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- W2054583090 title "Conformational Studies by Dynamic NMR. 88.<sup>1</sup> Stereomutation Processes in the Diastereoisomers of a Representative Amino Alcohol and Related Amide Precursors" @default.
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- W2054583090 doi "https://doi.org/10.1021/jo016363e" @default.
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