Boeyens (1934-2015) was a South African chemist and educator.
Boeyens was educated at the University of Pretoria.
He worked at the Council for Scientific and Industrial Research of South Africa and at Stanford University.
He became a professor of chemistry at the University of the Witwatersrand and Extraordinary Professor at UNISA.
He has written or co-written more than 600 scientific contributions.
Some of his books are used as textbooks of theoretical chemistry all over the world.
As an emeritus he wrote books challenging the current scientific consensus about the adequacy of quantum mechanics in which he presented a way to establish more accurate modern physics and chemistry without using higher mathematics by using elementary number theory.