Adventures with carbons 11, 12, 13 and 14.

I provide here a glimpse of my involvement with different isotopes of carbon. In my 65 years of synthetic work with C-12, I had experience working with C-11 (one year, 1942-1943), C-13 (one year, 1999) and C-14 (67 years, 1943-2009). I have also included a postscript dealing with my 1951 communication on the 5-carbon intermediate in photosynthesis. © Springer Science+Business Media B.V. 2011