Matrix support mass spectra

Observations of the UV absorption" attributable to benzyne in the vapor phase, evidence from time-resolved mass spectrometry, and more rei ntly of the IR spectrum of benzyne in a matrix at very low temperature leave no doubt as to the existence of such a transient intermediate. Its lifetime in solution is extended when benzyne is supported on a polymer phase. Results of competitive trapping experiments, when benzyne is generated from different precursors, and the classical experiments of Roberts et al. on cine-substitution in the amination of chlorobenzene confirm the formation of benzyne as an intermediate. ... 

---