0713210.1351/goldbook.ZT07132ZT07132
currentIUPAC Gold Book  zero differential overlap (ZDO) approximationzero differential overlap (ZDO) approximation
ZDO
2.3.320140224

1
An approach to the systematic neglect of the smallinvalue electron repulsion integrals which is used in a number of approximate selfconsistent field molecular orbital schemes. It means that all the products of atomic orbitals χ µ χ ν are set to zero and the overlap integralS µ ν = δ µ ν (where δ µ ν is the Kronecker delta). The ZDO approximation greatly simplifies the computation of wavefunctions by eliminating many of twoelectron integrals. At the ZDO approximation all three and fourcentered integrals vanish.

goldify
http://dev.goldbook.iupac.org/terms/view/M03996

goldify
http://dev.goldbook.iupac.org/terms/view/O04357
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PAC, 1999, 71, 1919. 'Glossary of terms used in theoretical organic chemistry' on page 1970 (https://doi.org/10.1351/pac199971101919)
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML online corrected version: http://goldbook.iupac.org (2006) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0967855098. https://doi.org/10.1351/goldbook.
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