Why alkynyl quaternary carbon peak appears in dept-135 spectra in CdCl3?

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Vasantha Gowda

Is this true only for one particular quaternary carbon?

Apurba Maity

YES it true for the only alkynyl carbon attached to any aryl group.

Joseph S Merola

If you Google your question, you will find this: http://u-of-o-nmr-facility.blogspot.com/2007/11/why-does-my-quaternary-alkyne-carbon.html