As some of you know already, my long-time friend and M.Sc. supervisor, John Warkentin, died on March 30th. His family obituary is - HERE.
John came from Grunthal, in southern Manitoba, and was a student at the University of Manitoba, in Winnipeg. After completing his B.Sc., he worked on his M.Sc. with Gerry Dunn (1919-2013) there, and then went south to Iowa State College to work with George Hammond (1921-2005) for his Ph.D. degree. When George moved to Caltech, John joined him briefly as a post-doc, and then had a longer post-doc stint with Paul Bartlett (1907-1997) at Harvard. So, his credentials were pretty sound!
John was a fine scientist, an excellent teacher, a mentor and role model, as well as a solid friend to many of us. He was widely known and respected for his research in the area of free radical and carbene chemistry. Many of his mechanistic and synthetic studies involved studies of oxadiazolines which he showed to be versatile precursors of of diazo compounds (upon photolysis) and of carbenes (upon thermolysis), as depicted below.
The upcoming 42nd POMs at McMaster in November will be an excellent time to remember John and his contributions to physical organic chemistry, to his Department, and to his profession.