Aliphatic Polyethers, Basic Building Blocks from Naturally Occurring Humic Substances: Detection by Solid State ¹³C‐NMR Spectroscopy

Abstract

The structure of humic substances has long been a subject of controversy. In particular, their higher oxygen content could not be explained. Studies in solution did little to help. CP‐MAS‐13C‐NMR spectroscopy of the substances in the solid state has now permitted precise assignment of the structural elements. Aliphatic part‐structures comprise the framework of humic substances; of the oxygen‐containing groups, aliphatic ethers dominate.—These findings are also of importance in understanding the genesis of fossil fuels.