*Nuffield Commonwealth Fellow 1971–1972 (Cambridge)
*Fulbright Senior Scholar (California Institute of Technology, 1977, and Harvard University, 1986)
*H.G. Smith Memorial Medal 1981 (RACI)
*Member of the Australian Academy of Science 1983
*Flintoff Medal and Prize (RSC) 1990
*Fellow of the Royal Society of London 1990
*Hon. Fellow of the Royal Society of New Zealand 1991 (FRSNZ Hon)
*Made a Companion of the Order of Australia "for eminent service to science through pioneering contributions to organic chemistry in the field of plant growth hormones, to higher education as an academic, researcher and author, and to national and international scientific societies".