Pople diagram
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A Pople diagram or Pople's Diagram is a diagram which describes the relationship between various calculation methods. It was initially introduced in January 1965 by Sir John Anthony Pople, KBE FRS (31 October 1925 – 15 March 2004), during the Symposium of Atomic and Molecular Quantum Theory in Florida.[1] The Pople Diagram can be either 2-dimension or 3-dimensional, with the axes representing Ab initio quantum chemistry methods, Basis sets used in computational chemistry and treatment of relativity.[2] The diagram attempts to balance calculations by giving all aspects of a computation equal weight.
History
![](http://upload.wikimedia.org/wikipedia/commons/c/c1/John_Anthony_Pople.png)
John Pople first introduced the Pople Diagram during the Symposium on Atomic and Molecular Quantum Theory held on Sanibel Island, Florida, in January 1965. He called it a "hyperbola of quantum chemistry", which illustrates the inverse relationship between the sophistication of a calculational method and the number of electrons in a molecule that can be studied by that method.[1] Alternative (reverse) arrangement of the vertical axis or interchange of the two axes are also possible.[3][4]
Three-Dimensional Pople Diagrams
The 2-dimensional Pople diagram describes the convergence of the quantum-mechanical nonrelativistic electronic energy with the size of the basis set and the level of electron correlation included in the wavefunction.[5] In order to reproduce accurate experimental thermochemical properties, secondary energetic contributions have to be considered. The third dimension of the Pople diagram consists of such energetic contributions. These contributions may include: spin–orbit interaction, scalar relativistic, zero-point vibrational energy, and deviations from the Born–Oppenheimer approximation. The three-dimensional Pople diagram (also known as the Csaszar cube[6]) describes the energy contributions involved in quantum chemistry composite methods.[7]
See also
- John Pople
- Computational Chemistry
- Basis set (chemistry)
- Quantum chemistry composite methods
- Ab initio quantum chemistry methods
- Electronic correlation
References
- ^ a b Karplus, Martin (July 1990). "Three-dimensional "Pople diagram"". J. Phys. Chem. 14 (94). ACS.: 5435–5436. doi:10.1021/j100377a002. Retrieved October 21, 2015.
- ^ Dolg, Michael (17 February 2015). Computational Methods in Lanthanide and Actinide Chemistry. John Wiley & Sons, 2015. p. 480. ISBN 9781118688281.
- ^ Vereecken, Luc; Franciscob, Joseph (2012). "Theoretical studies of atmospheric reaction mechanisms in the troposphere". Chem. Soc. Rev. 41: 6259–6293. doi:10.1039/C2CS35070J.
- ^ Auer, Alexander A. (September 4, 2014). "Electron Correlation - Methods beyond Hartree-Fock, how to approach chemical accuracy" (PDF). Max-Planck-Institute for Chemical Energy Conversion, Mülheim. MMER Summerschool 2014 - Electron Correlation. Retrieved October 21, 2015.
- ^ J. A. Pople (1965). "Two‐Dimensional Chart of Quantum Chemistry". Journal of Chemical Physics. doi:10.1063/1.1701495.
- ^ G. Tarczay; A. G. Csaszar; W. klopper; H. M. quiney (2001). "Anatomy of relativistic energy corrections in light molecular systems". Molecular Physics. doi:10.1080/00268970110073907.
- ^ A. Karton (2016). "A computational chemist's guide to accurate thermochemistry for organic molecules". Wiley Interdisciplinary Reviews: Computational Molecular Science. doi:10.1002/wcms.1249.