Fig. 2. ¹H NMR spectra (CD₂Cl₂, 400 MHz) showing the propagating G3-alkylidene complex (at 18.45 ppm, red line) and its reaction with only 1.2 equiv. of CTA1 after 5 min (doublet at 18.56 ppm, in blue and doublet of doublet at 8.40 ppm, in magenta).