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XX.C.1.a.

Calculated Energies of Hydrogen-Bonded dimers

Dimer Name H Donor H Acceptor comment
NH3NH3 Ammonia Dimer NH3 NH3
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
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2pd) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
hartree fock HF
-110.9169108
 
 
-111.7537656
-55.872189755881.5758
-55.872164755881.6009
-111.7537656
 
 
-112.3353128
 
 
-112.3430009
-56.184351856158.6491
-55.849558456493.4425
-112.3960186
 
 
-112.4060218
-56.200899156205.1227
-56.200907356205.1145
-112.4073554
 
 
-112.4259056
 
 
-112.4028607
 
 
-112.4421401
-56.219550856222.5893
-56.219551756222.5883
-112.4371732
 
 
-112.3966079
 
 
-112.4404350
 
 
-112.4504778
 
 
-112.4145575
 
 
-112.4445456
-56.220788556223.7571
-56.220806156223.7395
-112.4519170
 
 
density functional B3LYP
-111.5958114
 
 
-112.4729447
-56.229057656243.8871
-56.229114956243.8298
-112.4727651
 
 
-113.0726797
 
 
-113.1032953
-56.547916556555.3788
-56.547943956555.3514
-113.1225563
 
 
-113.1397368
-56.566966756572.7702
-56.566982956572.7539
-113.1425909
 
 
-113.1598539
 
 
-113.1267444
 
 
-113.1791715
-56.587552256591.6193
-56.587555256591.6163
-113.1730026
 
 
-113.1161992
 
 
-113.1750519
 
 
-113.1875274
 
 
-113.1461188
 
 
-113.1816691
-56.588835856592.8333
-56.588857256592.8119
-113.1902316
 
 
B3LYPultrafine  
-112.4731632
-112.461918311.2449
-112.46551437.6489
   
-113.1032990
-113.10055312.7459
-113.10139231.9067
 
-113.1397412
-113.13802101.7202
-56.566984156572.7571
     
-113.1791740
-113.17815961.0144
-113.17903040.1436
-113.1730055
 
 
-113.1162012
 
 
-113.1750536
 
 
 
-113.1461223
 
 
-113.1816717
-113.18069830.9734
-113.18162660.0451
 
PBEPBE
-111.4486901
 
 
-112.3193196
-56.150696756168.6229
-56.150851556168.4680
-112.3193385
 
 
-112.9196089
 
 
-112.9497747
-56.470441256479.3336
-56.470478556479.2962
-112.9691203
 
 
-112.9871500
-56.480198856506.9512
-56.490013256497.1368
-112.9875191
 
 
-113.0056012
 
 
-112.9731184
 
 
-113.0252172
-56.510012256515.2050
-56.510042156515.1751
-113.0188179
 
 
-112.9640531
 
 
-113.0203193
 
 
 
-112.9944059
 
 
-113.0277342
-56.511347256516.3870
-56.511364156516.3701
 
PBEPBEultrafine  
-112.3193422
-56.150716256168.6260
-56.150851756168.4905
   
-112.9497783
-56.470450556479.3278
-56.470423556479.3548
 
-112.9871539
-56.489982356497.1716
-56.490014656497.1394
     
-113.0252219
-56.510015056515.2069
-56.510042756515.1792
-113.0188210
 
 
-112.9640551
 
 
-113.0203218
 
 
 
-112.9944099
 
 
-113.0277374
-56.511348056516.3894
-56.511365056516.3724
 
Moller Plesset perturbation MP2
-111.0215156
 
 
-111.9784183
-55.871478056106.9402
-55.871353156107.0651
-111.9784183
 
 
-112.5676358
 
 
-112.7159383
-56.183767856532.1705
-56.183789056532.1493
-112.7736591
 
 
-112.7904705
-56.200412456590.0581
-56.200488956589.9816
-112.7690008
 
 
-112.8253402
 
 
-112.8350317
 
 
-112.9172854
-56.219076556698.2089
-56.219081456698.2040
-112.8377273
 
 
-112.7726934
 
 
-112.9123915
 
 
-112.9549355
 
 
-112.8155544
 
 
-112.9263185
-56.220289556706.0291
-56.220288756706.0298
-112.9606807
 
 
Coupled Cluster CCSD(T)  
-112.0076578
-55.870879156136.7787
 
   
-112.7511266
-56.183409156567.7175
 
 
-112.8275026
-112.82504792.4547
 
     
-112.9572497
 
 
-112.8756661
 
 
-112.8122074
 
 
 
-112.9715348
 
 
-112.8567555
 
 
-112.9663286
 
 
-112.9778562
 
 
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.