Amyand David Buckingham CBE FRS FAA (28 January 1930 in Pymble, New South Wales – 4 February 2021) was an Australian chemist, with primary expertise in chemical physics.

He also played 10 first class cricket matches for Cambridge University and Free Foresters between 1955 and 1960, scoring 349 runs including two half-centuries at an average of 18.36.

Professor Buckingham's research has focussed on the measurement and understanding of the electric, magnetic and optical properties of molecules; as well as on the theory of intermolecular forces.

Initially he worked on dielectric properties of liquids, such as dipole moments of molecules in both solution and gas phases.

[14][15] In 1962 he considered the effect on NMR spectra of molecular orientation in a strong electric field, and developed a method to determine the absolute sign of the spin-spin coupling constant.

[18] In the 1980s, he showed the importance of long-range intermolecular forces in determining the structure and properties of small molecule clusters, with particular applications in biological macromolecules.

David Buckingham died in Cambridge on 4 February 2021, seven days after his 91st birthday; he was survived by Jill, their children and grandchildren.