Assignment of ¹ H and ¹³ C NMR Chemical Shifts of Nitroxanthones and Development of Additivity Rules

Abstract

1H and 13C NMR chemical shifts and the homo‐ and heteronuclear coupling constants of 14 nitroxanthones are presented. Specific nitro increments for xanthones depending on substituent position and on the respective ring carbon position and shift additivity rules were developed by means of multiple linear regression analysis.