Correlation between C and O chemical shifts and torsional strain in spiroacetals |
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| Authors: | Jorge Antonio Guerrero-Alvarez |
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| Affiliation: | a Centro de Investigaciones Químicas de la Universidad Autónoma del Estado de Morelos, Av. Universidad No. 1001 Col. Chamilpa, Cuernavaca Morelos 62209, Mexico
b Departamento de Química, Cinvestav, Apartado 14-740, 07000 México, DF, Mexico |
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| Abstract: | The relationship between the 13C and 17O NMR chemical shifts and the dihedral energies (non-bonding interactions) of 1,4-dioxaspiro[4.4]nonane, 1,4-dioxa- and 6,10-dioxaspiro[4.5]decane, 1,4-dioxa- and 6,11-dioxaspiro[4.6]undecane, 1,5-dioxaspiro[5.5]undecane, 1,5-dioxa and 7,12-dioxaspiro[5.6]dodecane and 1,6-dioxaspiro[6.6]tridecane were analyzed. These data showed correlation of the non-bonding interactions with the chemical shift of the spiranic carbon, as well as a linear relationship between 13C and 17O. |
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| Keywords: | Dioxaspiro derivatives Annular strength 13C and 17O NMR |
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