CLIP-HSQMBC: easy measurement of small proton-carbon coupling constants in organic molecules

Org Biomol Chem. 2013 Jul 21;11(27):4473-8. doi: 10.1039/c3ob40675j.

Abstract

A user-friendly 2D NMR approach denoted as CLIP-HSQMBC is proposed for the very easy, direct and accurate measurement of long-range proton-carbon coupling constants in organic molecules and natural products. The J value can be extracted directly from the analysis of resolved in-phase (1)H multiplets that show an additional splitting arising from the proton-carbon coupling. In cases of unresolved peaks, a simple fitting analysis using the internal satellite lines as a reference is performed. Addition of a spin-lock period results in a CLIP-HSQMBC-TOCSY experiment that is suitable for the measurement of very small coupling values or to observe correlations from overlapped resonances.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon / chemistry*
  • Convulsants / chemistry
  • Magnetic Resonance Spectroscopy / methods*
  • Protons*
  • Strychnine / chemistry

Substances

  • Convulsants
  • Protons
  • Carbon
  • Strychnine