1976
DOI: 10.1002/bbpc.19760801218
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The Molecular Structure of Allenes and Ketenes VII [1] 13CH Nuclear Spin‐Spin Couplings in Monosubstituted Allenes

Abstract: From high-resolution "C-NMR spectra direct and long-range (up to four-bond) carbon-proton coupling constants of allenes have been obtained. Relative signs of the coupling constants have been determined relating them to the (absolute) signs of couplings in selected model comvounds.*) Present address: Studiengruppe fur Systemforschung, Werderstr. 35, 6900 Heidelberg.

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Cited by 14 publications
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“…In general, an excellent agreement between calculated and experimental molar rotations is observed. Only four compounds exhibit larger deviations (1,11,15,17). In the case of ( )-l,3-dimethylallene (1) one cannot be quite sure that the given molar rotation corresponds to that of the optically pure Journal of the American Chemical Society / 99:17 j August X((CH3)3C) = +18.9…”
Section: (I) Introductionmentioning
confidence: 98%
See 1 more Smart Citation
“…In general, an excellent agreement between calculated and experimental molar rotations is observed. Only four compounds exhibit larger deviations (1,11,15,17). In the case of ( )-l,3-dimethylallene (1) one cannot be quite sure that the given molar rotation corresponds to that of the optically pure Journal of the American Chemical Society / 99:17 j August X((CH3)3C) = +18.9…”
Section: (I) Introductionmentioning
confidence: 98%
“…(2) Correlations of the X(R) Parameters with Other Substituent Parameters. A quantum-mechanical treatment of the optical rotation [ ]25 of ( 5)-1,3-dimethylallene (1) has given the physical interpretation of the substituent parameter X(CH3) of the -inductive donor group CH3.5 According to the theory the parameter X(R) is related to the difference of the (group) polarizabilities concerning the major axes of the =C-R bond, Aa(R) = arr(R) -att(R), the anisotropy of the polarizability, and a factor k(R), characterizing the variations and reductions of electronic charges in the Csp2-Csp3 bonding region. The factor k(R) should be viewed as a measure of the polarity of the C-R bond between the allenic terminal carbon atom and the ligand carbon atom.…”
Section: (I) Introductionmentioning
confidence: 99%