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Geometry Comparison

DS (Mercapto-d)


distance is atom 1 (S) to atom 2 (H)

Experimental bond length is 1.341  Å

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Calculated bond length in Å
Methods with predefined basis sets
semi-empirical PM3 1.297
PM6 1.341
composite G3 1.330
G3B3 1.355
G4 1.351
molecular mechanics DREIDING 1.360

Calculated bond length in Å
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,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z daug-cc-pVTZ
hartree fock HF 1.338 1.358 1.330 1.361 1.330 1.331 1.331 1.335 1.335 1.331 1.330 1.338 1.343 1.333 1.331 1.343 1.333 1.331 1.330 1.333
ROHF   1.330 1.330   1.330 1.331 1.331 1.336         1.344 1.334         1.330  
density functional LSDA 1.371 1.394 1.363 1.398 1.366 1.363 1.364 1.367 1.363 1.360     1.372 1.359   1.371 1.359      
BLYP 1.382 1.395 1.366 1.401 1.368 1.366 1.366 1.369 1.364 1.361     1.375 1.360   1.372        
B1B95 1.363   1.347 1.381 1.347 1.347 1.347 1.352 1.348 1.345     1.358 1.344   1.355 1.345      
B3LYP 1.368 1.382 1.353 1.387 1.355 1.353 1.354 1.357   1.351 1.346 1.356 1.364 1.350 1.348 1.362 1.349 1.347 1.347  
B3LYPultrafine         1.355                       1.349      
B3PW91 1.366 1.380 1.351 1.384 1.352 1.351 1.351 1.355   1.348     1.361 1.349   1.360 1.349      
mPW1PW91 1.362 1.376 1.348 1.380 1.349 1.348 1.348 1.353 1.349 1.346     1.358 1.347   1.358        
M06-2X     1.344   1.346         1.344 1.340     1.344     1.344      
PBEPBE 1.377 1.392 1.362 1.397 1.365 1.362 1.363 1.367 1.363 1.359 1.356   1.372 1.359   1.371 1.359      
PBEPBEultrafine         1.365                              
PBE1PBE         1.350                              
HSEh1PBE   1.378     1.350   1.349             1.348            
TPSSh         1.352   1.350     1.348       1.349            
wB97X-D     1.350   1.350   1.349   1.349     1.352 1.349 1.347     1.346      
B97D3   1.381     1.358   1.356   1.356   1.349 1.358   1.352     1.352     1.352
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,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z daug-cc-pVTZ
Moller Plesset perturbation MP2 1.354 1.377 1.342 1.382 1.346 1.335 1.335 1.347 1.338 1.340   1.342 1.352 1.340 1.336 1.354 1.340   1.336  
MP2=FULL   1.377     1.346 1.334 1.334 1.347   1.337     1.350 1.336 1.335 1.352 1.335   1.333  
MP3         1.349   1.338                          
MP3=FULL         1.351   1.337                          
MP4   1.386     1.353     1.356           1.344            
B2PLYP         1.350         1.345       1.345     1.345      
B2PLYP=FULLultrafine         1.349               1.357 1.344     1.343      
Configuration interaction CID         1.350     1.352           1.341            
CISD   1.389     1.351                 1.341            
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,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z daug-cc-pVTZ
Quadratic configuration interaction QCISD   1.390 1.396   1.354 1.340 1.340 1.356   1.344     1.358 1.344     1.345   1.341  
QCISD(T)         1.355 1.341 1.342 1.358         1.359 1.346            
Coupled Cluster CCD   1.388     1.354 1.340 1.340 1.355         1.356 1.343         1.340  
CCSD         1.354 1.341 1.341 1.356   1.344     1.357 1.344     1.344      
CCSD=FULL         1.354         1.342       1.341     1.339      
CCSD(T)         1.355 1.341 1.342 1.358     1.344   1.359 1.346         1.343  
CCSD(T)=FULL                                     1.339  
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,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z daug-cc-pVTZ

Calculated bond length in Å
Methods with effective core potentials (select basis sets)
CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD cc-pVTZ-PP aug-cc-pVTZ-PP Def2TZVPP
hartree fock HF 1.371 1.342 1.375 1.342 1.364 1.359     1.330
density functional B1B95 1.398 1.366 1.400 1.365 1.389 1.376      
B3LYP 1.399 1.367 1.401 1.365 1.390 1.382     1.347
PBEPBE                 1.356
Moller Plesset perturbation MP2 1.392 1.356 1.395 1.355 1.381 1.376     1.335
Values that are outliers may reflect incorrect atom numbering for different levels of theory.
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