Roy McWeeny (19 May 1924 – 29 April 2021) was a British academic physicist and chemist.
In 1982 he moved to the University of Pisa, Italy where he remained an Emeritus Professor until his death.
In 1996 a celebratory festschrift volume was published in his honour containing original papers by 132 scientists from 19 countries.
[1] He was awarded the 2006 Spiers Memorial Medal by the Faraday Division of the Royal Society of Chemistry and the Medal Lecture, "Quantum chemistry: The first seventy years", was published in Faraday Discussions.
He wrote several chapters in the three volumes of the Handbook of Molecular Physics and Quantum Chemistry.