How do I determine the energy of molecular orbital from the output file?

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Atthar Luqman Ivansyah

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Feb 23, 2015, 11:18:30 AM2/23/15
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Hello,

When I did a calculation, I used this input file :

...
   &PRINT
    &MO_CUBES
    NHOMO 100
    NLUMO 100
    &END MO_CUBES
    &E_DENSITY_CUBE
    &END E_DENSITY_CUBE
   &END PRINT
...

I got this output file :

...
  Eigenvalues of the occupied subspace spin            1
 ---------------------------------------------
      -2.26384864     -2.26315705     -2.26059414     -2.26010642
      -2.25649697     -2.25647791     -2.25639483     -2.25565972
      -2.25455248     -2.25360156     -2.25335570     -2.25049824
      -2.24978754     -2.24820713     -2.24705385     -2.22787681
      -2.22168703     -2.22130507     -2.22051631     -2.21935385
      -2.21849023     -2.21823761     -2.21762671     -2.21629125
      -2.19860733     -2.19848054     -2.19775245     -2.19718769
      -2.19439639     -2.19404008     -2.19401607     -2.19386785
      -1.34611484     -1.34592794     -1.34363629     -1.34329136
      -1.34126351     -1.34061207     -1.33822725     -1.33582358
      -1.33536847     -1.33528901     -1.33509037     -1.33472744
      -1.33462173     -1.33412017     -1.33407705     -1.33400259
      -1.33257461     -1.33210385     -1.33199970     -1.33079485
      -1.33076168     -1.33032659     -1.33008881     -1.32994723
      -1.32986485     -1.32963743     -1.32944856     -1.32926168
      -1.32783708     -1.32778087     -1.32691769     -1.32680979
      -1.32634989     -1.32608176     -1.32607866     -1.32572667
      -1.32533284     -1.32475893     -1.32407386     -1.32044851
      -1.31964540     -1.31848150     -1.31769166     -1.31738173
      -1.31631697     -1.30855344     -1.30645025     -1.30069122
      -1.29885491     -1.29864253     -1.29862399     -1.29827034
      -1.29782249     -1.29764324     -1.29747490     -1.29741295
      -1.29701056     -1.29614000     -1.29589606     -1.29579337
      -1.29566711     -1.29519342     -1.29511999     -1.29477515
      -1.29409787     -1.29390554     -1.29383553     -1.29360979
      -1.29281399     -1.29127096     -1.29094802     -1.28828195
      -1.27702648     -1.27661601     -1.27595865     -1.27522357
      -1.27340698     -1.27340081     -1.27308209     -1.27284635
      -1.27277249     -1.27264649     -1.27261130     -1.27242716
      -1.27239251     -1.27124986     -1.26962964     -1.26948090
      -1.26944322     -1.26898776     -1.26839873     -1.26822072
      -1.26800514     -1.26755345     -1.26627732     -1.26566897
      -0.77118003     -0.76700574     -0.76493964     -0.76393111
      -0.76125355     -0.75500693     -0.75422782     -0.75153507
      -0.75073877     -0.75071456     -0.74603189     -0.74563903
      -0.74363070     -0.74327918     -0.74237294     -0.73796085
      -0.73530199     -0.73518578     -0.73467645     -0.73426244
      -0.73382523     -0.73215871     -0.73157693     -0.73105049
      -0.73076469     -0.72989943     -0.72904680     -0.72890756
      -0.72730505     -0.72710376     -0.72566866     -0.72438400
      -0.72396424     -0.72177585     -0.72069686     -0.71669444
      -0.71311281     -0.70937645     -0.70404603     -0.70033210
      -0.69817342     -0.69760216     -0.69627113     -0.68400729
      -0.68299784     -0.68298654     -0.68155309     -0.68121512
      -0.68024198     -0.68012073     -0.67896451     -0.67827859
      -0.67387503     -0.67138724     -0.67044415     -0.67042879
      -0.65657226     -0.65542351     -0.65494420     -0.65374246
      -0.65286224     -0.65243256     -0.65144170     -0.65018071
      -0.55933848     -0.54981990     -0.29578526     -0.29228083
      -0.28968994     -0.28658752     -0.28640637     -0.28609631
      -0.28572893     -0.28380663     -0.28368576     -0.28307149
      -0.28229801     -0.28168904     -0.28075405     -0.27915458
      -0.27751674     -0.27730363     -0.27645269     -0.27588939
      -0.27543537     -0.27422376     -0.27363901     -0.27302111
      -0.27281029     -0.27047723     -0.26978869     -0.26900961
      -0.26814442     -0.26773590     -0.26576538     -0.26419916
      -0.26387966     -0.26291500     -0.26196434     -0.26054315
      -0.25971361     -0.25951046     -0.25932846     -0.25891276
      -0.25721715     -0.25586083     -0.25567823     -0.25520095
      -0.25350494     -0.25343909     -0.25181188     -0.25125828
      -0.24987557     -0.24724768     -0.24607169     -0.24521010
      -0.24378715     -0.24319154     -0.24250344     -0.24151736
      -0.23681340     -0.23595578     -0.23524083     -0.23331320
      -0.23308162     -0.23041080     -0.23002333     -0.22961582
      -0.22947071     -0.22851306     -0.22844323     -0.22699655
      -0.22480732     -0.22368259     -0.22348793     -0.22187949
      -0.22171163     -0.22110899     -0.22082996     -0.22035724
      -0.21889825     -0.21865049     -0.21838598     -0.21773864
      -0.21741808     -0.21596949     -0.21315045     -0.21239045
      -0.21111694     -0.21094628     -0.20962944     -0.20924399
      -0.20917211     -0.20802429     -0.20672193     -0.20605588
      -0.20585277     -0.20500505     -0.20479043     -0.20383051
      -0.20153029     -0.20054151     -0.19988362     -0.19971603
      -0.19876428     -0.19847715     -0.19432909     -0.19344286
      -0.19276283     -0.19247578     -0.19168711     -0.19151421
      -0.19056778     -0.19039866     -0.18997194     -0.18948191
      -0.18754957     -0.18735843     -0.18657417     -0.18470722
      -0.18414175     -0.18288858     -0.18163771     -0.18091788
      -0.18036463     -0.17995177     -0.17922280     -0.17763245
      -0.17743641     -0.17631479     -0.17560149     -0.17445314
      -0.17431216     -0.17351692     -0.17274960     -0.17252927
      -0.17156261     -0.17075215     -0.17055951     -0.17032990
      -0.17025516     -0.16970283     -0.16920390     -0.16869967
      -0.16848434     -0.16772803     -0.16701649     -0.16617869
      -0.16593503     -0.16474325     -0.16381613     -0.16305433
      -0.16245014     -0.16195267     -0.16110653     -0.16055045
      -0.15965176     -0.15935367     -0.15781756     -0.15729601
      -0.15552514     -0.15511869     -0.15441813     -0.15281392
      -0.15142000     -0.15084304     -0.15014609     -0.14934144
      -0.14767295     -0.14555660     -0.14385850     -0.14355889
      -0.14175981     -0.14129552     -0.13884036     -0.13798723
      -0.13672646     -0.13536559     -0.13510740     -0.13467421
      -0.13391288     -0.13262788     -0.13193362     -0.12830121
      -0.12806996     -0.12776763     -0.12712408     -0.12612507
      -0.12560248     -0.12508957     -0.12479284     -0.12450777
      -0.12256556     -0.12233075     -0.12135089     -0.11980985
      -0.11840681     -0.11239748     -0.11101477     -0.10708174
      -0.10601139     -0.10418148     -0.08789325
 Fermi Energy [eV] :   -2.391697
 
  Lowest Eigenvalues of the unoccupied subspace spin            1
 -----------------------------------------------------
  Reached convergence in          165  iterations
      -0.08728188     -0.08561642     -0.08217453     -0.08109417
      -0.06025393     -0.05842373     -0.05394901     -0.04237903
      -0.04164620     -0.03987554     -0.03615688     -0.03579655
      -0.03038122     -0.03029939     -0.02541994     -0.02494017
      -0.02418068     -0.02295830     -0.02260912     -0.02113098
      -0.01843398     -0.01763450     -0.01443546     -0.01355130
      -0.01300694     -0.01155231     -0.00928729     -0.00838997
      -0.00796755     -0.00786985     -0.00695691     -0.00627893
      -0.00402414     -0.00244243     -0.00145432     -0.00098305
      -0.00017292      0.00037481      0.00196561      0.00210159
       0.00328212      0.00373062      0.00454368      0.00589696
       0.00614429      0.00678601      0.00746645      0.00947392
       0.01005207      0.01334383      0.01396828      0.01522876
       0.01691492      0.01909083      0.01938554      0.02101805
       0.02126469      0.02267837      0.02286798      0.02474498
       0.02490374      0.02562160      0.02727307      0.02807259
       0.02859703      0.03038243      0.03147016      0.03163094
       0.03210868      0.03272551      0.03477786      0.03572571
       0.03622465      0.03727120      0.04024406      0.04253342
       0.04330270      0.04526037      0.04535618      0.04660433
       0.04705769      0.04857412      0.04873475      0.05051451
       0.05109578      0.05214851      0.05241119      0.05328636
       0.05443264      0.05512596      0.05529064      0.05566920
       0.05639413      0.05694234      0.05714915      0.05741359
       0.05874540      0.05884525      0.05929884      0.05985442
 
 HOMO - LUMO gap [eV] :    0.016636

 ENERGY| Total FORCE_EVAL ( QS ) energy (a.u.):            -2915.590928223338778
...

From the data of the output file above, How do i determine the energy of molecular orbital, like energy of HOMO, LUMO, HOMO-1, LUMO+1, ...?

Thank you very much for your answer and your attention. I am very sorry for my silly question.

Best regards,
atthar

Zhendong Guo

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Feb 23, 2015, 12:13:23 PM2/23/15
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Dear attthar
  Please add the  following settings into your "print part". The eigenvalues of MOS will be shown in the output file. Best regards.
zhendong
      &MO
        OCCNUMS
        EIGVALS
      &END MO
   


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Ari Paavo Seitsonen

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Feb 23, 2015, 5:30:29 PM2/23/15
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... or, adding to the previous reply, you see that first " Eigenvalues of the occupied subspace spin " are printed out (in Hartree), so the highest one of those is the HOMO (-0.08789325 in your case) and "Lowest Eigenvalues of the unoccupied subspace spin" yields what is says, so the first one is the LUMO. The print option mentioned in the first reply might be more user-friendly, but the information is already here.

    Greetings from Paris,

       apsi

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