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XX.C.1.a.

Calculated Energies of Hydrogen-Bonded dimers

Dimer Name H Donor H Acceptor comment
H2OH2O water dimer H2O H2O
Energies in hartrees
Click on entry for more information.
The energies in each cell in the following tables are:
uncorrected 
cp correcteddiff
cp geometry optimzeddiff
The first entry is the calculated energy.
The second entry is the counterpoise corrected energy.
The third entry is the energy from the counterpoise corrected optimized geomtery.
Differences from the uncorrected energy are shown to the right in millihartrees.
Methods with predefined basis sets
Methods with standard basis sets
3-21G 6-31G* 6-31+G** 6-311+G(3df,2p) 6-311+G(3df,2pd) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z
hartree fock HF
-151.1894036
-151.18149107.9126
-151.18238397.0197
-152.0304565
-152.02898071.4758
-152.02911481.3417
-152.0704856
-152.06950950.9761
-152.06955560.9300
-152.1229179
 
 
-152.1244591
-152.12403140.4277
-152.12404670.4124
-152.1212597
 
 
    
-152.1374225
 
 
-152.1283699
-152.12822840.1415
-152.12827050.0994
-152.1392916
 
 
  
density functional B3LYP
-151.9723834
-151.957723114.6603
-151.959600112.7833
-152.8303324
-152.82416486.1676
-152.82710483.2276
-152.8777175
-152.87636841.3492
-152.87642061.2969
  
-152.9359946
-152.93537000.6246
-152.93552490.4697
-152.9307908
 
 
    
-152.9477749
 
 
-152.9396779
-152.93940420.2737
-152.93959760.0803
-152.9517715
 
 
  
B3LYPultrafine
-151.9723822
-151.951926020.4562
-151.959597312.7849
-152.8303358
-152.82418236.1535
-152.82710473.2311
-152.8777199
-152.87636561.3543
-152.87641981.3001
  
-152.9359958
-152.93537680.6190
-152.93552370.4721
        
-152.9396795
-152.93940460.2749
-152.93959610.0834
    
PBEPBE
-151.8016300
-151.778139323.4907
-151.785556716.0733
-152.6595352
-152.65241447.1208
-152.65511074.4245
-152.7078621
-152.70635861.5035
-152.70643101.4311
  
-152.7648071
-152.76423700.5701
-152.76424020.5669
        
-152.7688056
-152.76835740.4482
-152.76871620.0894
    
PBEPBEultrafine
-151.8016311
-151.778130623.5005
-151.785559216.0719
-152.6595337
-152.65228867.2451
-152.65296736.5664
-152.7078653
-152.70635721.5081
-152.70642961.4357
  
-152.7648081
-152.76423540.5728
-152.76423910.5690
        
-152.7688079
-152.76835770.4502
-152.76871690.0910
    
Moller Plesset perturbation MP2FC
-151.4357274
-151.423069512.6579
-151.425064110.6633
-152.4053555
-152.40181323.5423
-152.40226453.0910
-152.4763816
-152.47382862.5530
-152.47400562.3760
  
-152.6547315
-152.65359941.1322
-152.65363781.0938
-152.5613969
 
 
-152.4692329
 
 
-152.6470117
 
 
  
-152.6662409
-152.66549050.7504
-152.66550290.7380
  
-152.6470117
 
 
Coupled Cluster CCSD(T)
-151.4533197
-151.440842212.4775
-151.442876810.4428
-152.4268521
-152.42334043.5117
-152.42376413.0880
-152.4987572
-152.49616932.5879
-152.49634892.4083
  
-152.6812357
-152.68008421.1515
-152.68012141.1143
        
-152.6929659
-152.69221640.7495
-152.69222830.7376
    
For descriptions of the methods (AM1, HF, MP2, ...) and basis sets (3-21G, 3-21G*, 6-31G, ...) see the glossary in section I.C. Predefined means the basis set used is determined by the method.