ISSN:
0021-8383
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Substituent Effects in 13C-N.M.R. Spectra of Diastereomeric Chalcone Dihalogenides. VIII. Investigations of α- and β-Halogene Dihydrochalcones and Calculation of 13C-chemical Shifts of Diastereomeric Chalcone Dihalogenides and Chalcone HalogenohydrinsThe chemical shifts of C-α and C-β in the 13C-n.m.r. spectra are determined and compared with calculated values from an incremental system and Taft relationship. The correlations are extended for erythro and threo isomers of halohydrins and diastereometric dihalogenides 6-18.The chemical shifts of C-α and C-β atoms of 6-18 are described in the dependence of the shifts calculated by an incremental system. Excellent correlations allowed the computation of chemical shifts of C-α and C-β for diastereomeric α,β-disubstituted dihydrochalcone derivatives likely 6-18 in advance.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19893310208