Aufklärung der Molekülstruktur von Rohölinhaltsstoffen durch NMR-Spektroskopie. II. Struktur der Alkylsubstituenten in den Aromaten des Rohöls

Elucidation of the Molecular Structure of Petroleum Constituents by N.M.R. -Spectroscopy. II. Structure of Alkyl Substituents in Aromatic Hydrocarbons in Petroleum Crude The structure of alkyl chains of aromatic hydrocarbons of heavier petroleum fractions is studied by ¹H and ¹³C-n.m.r. spectroscopy An average aromatic molecule is found with an average degree of substitution of 40–50%, the substituents representing short paraffinic chains or naphthenic rings.