The 3D HCP-CCH TOCSY experiment is a simple extension of the 3D HCP experiment in which ¹³C magnetization is relayed further to the neighborings ¹³C nuclei, through the large single-bond ¹³C-¹³C scalar coupling via TOCSY in ¹³C-labeled nucleic acids.

Implementation on AVANCE spectrometers equipped with a third channel and gradient technology.

This experiment has been described in 95JB87 Basic Sequence using gradients:

Basic Sequence using gradients and jump-and-return:

Using Echo-antiecho:

Using Echo-antiecho and sensitivity-improvement:

Other approaches:

Simultaneous acquisition of HCN-CCH-TOCSY and HCP-CCH-TOCSY experiments ( 96JB251 ).

2D P(CC)H-TOCSY experiment ( 95JB82 ).

An analog HCP-CCH-COSY experiment has been proposed that use a COSY-like transfer ( 95JMRB89-106 )

In the HCPCH spectra, all H/C pairs are sorted in a 2D spectrum as a function of ³¹P chemical shift in the third dimension.