The limits of the extended hückel theory to calculate the total density of states of medium-sized molecules

dc.contributor.authorGómez Jeria, Juan Sebastián
dc.date.accessioned2013-10-22T18:50:53Z
dc.date.accessioned2016-05-25T05:49:25Z
dc.date.available2013-10-22T18:50:53Z
dc.date.available2016-05-25T05:49:25Z
dc.date.issued2006
dc.descriptionIndexación: Scielo
dc.description.abstractTwo medium-sized molecular systems X60 (X=C,N) were analyzed using Extended Hückel, Density Functional and ab initio Hartree-Fock methods. The aim of the work was to test the reliability of the EHT methodology to calculate the total Density of States distribution curve. The Extended Hückel method is only reliable in the cases of the first valence and conduction bands of these systems. For the rest of the Density of States distribution curve EHT performs badly. The sources of error of EHT, come from the non-inclusion of the electron-electron interaction and from incorrect results regarding the relative ordering of the MO degeneracies. Both sources of error should disappear when the occupied and empty molecular orbitals become very similar in energy over a certain range, forming an almost continuous band, as happens in bigger molecular systems.
dc.description.urihttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072006000400016&nrm=iso
dc.identifier.citationJournal of the Chilean Chemical Society, Vol. 51, pp. 1061-1064, 2006.
dc.identifier.issnISSN: 0717-9707
dc.identifier.otherDOI: 10.4067/S0717-97072006000400016
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/2035
dc.languageeng
dc.publisherSociedad Chilena de Química
dc.subjectExtended Hückel Method
dc.subjectN60
dc.subjectC60
dc.subjectTotal Density of States
dc.subjectDensity Functional Method
dc.titleThe limits of the extended hückel theory to calculate the total density of states of medium-sized molecules
dc.typeArtículo
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