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Geometry Comparison

NF (nitrogen fluoride)


distance is atom 1 (N) to atom 2 (F)

Experimental bond length is 1.317  Å

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Calculated bond length in Å
Methods with predefined basis sets
semi-empirical AM1 1.225
PM3 1.250
PM6 1.288
composite G2 1.280
G3 1.280
G3B3 1.311
G3MP2 1.302
G4 1.293
CBS-Q 1.269

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-pCVDZ cc-pCVTZ daug-cc-pVTZ
hartree fock HF 1.317 1.364 1.364 1.343 1.280 1.280 1.282 1.269 1.269 1.268 1.289 1.281 1.273 1.269 1.267 1.278 1.269 1.267 1.296 1.291 1.269
ROHF         1.305   1.308           1.298 1.294              
density functional LSDA 1.353 1.374 1.374 1.360 1.298 1.298 1.301 1.293 1.293 1.286     1.294 1.290   1.297 1.290        
BLYP 1.382 1.410 1.410 1.402 1.317 1.337 1.343 1.334 1.334 1.324     1.335 1.332   1.352          
B1B95 1.345 1.375 1.375 1.360 1.298 1.298 1.300 1.291 1.291 1.286     1.293 1.290 1.289 1.296 1.290 1.288      
B3LYP 1.357 1.386 1.386 1.374 1.311 1.311 1.316 1.306 1.306 1.299 1.316 1.307 1.308 1.305 1.303 1.311 1.305 1.303 1.320 1.318  
B3LYPultrafine         1.311                       1.296        
B3PW91 1.351 1.380 1.380 1.366 1.303 1.303 1.306 1.297 1.297 1.291     1.299 1.295   1.318          
mPW1PW91 1.346 1.375 1.375 1.360 1.298 1.298 1.301 1.291 1.291 1.287     1.294 1.290   1.313          
M06-2X     1.372   1.294           1.282                    
PBEPBE 1.371 1.399 1.399 1.388 1.322 1.322 1.326 1.318 1.318 1.310 1.325   1.319 1.316 1.315 1.322 1.317 1.314      
PBEPBEultrafine         1.332                                
PBE1PBE         1.297                                
HSEh1PBE   1.355     1.311   1.301             1.294              
TPSSh         1.306   1.307     1.298       1.300              
wB97X-D     1.346   1.293   1.295   1.288     1.289 1.295 1.287     1.287        
B97D3   1.360     1.308   1.309   1.303   1.299 1.320   1.302     1.315       1.315
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-pCVDZ cc-pCVTZ daug-cc-pVTZ
Moller Plesset perturbation MP2 1.329 1.385 1.385 1.384 1.303 1.311 1.318 1.288 1.291 1.289   1.301 1.299 1.293 1.291 1.312 1.296 1.312 1.318 1.312  
MP2=FULL 1.329 1.385 1.385 1.384 1.310 1.310 1.316 1.290 1.290 1.287     1.298 1.289 1.288 1.311 1.290   1.317 1.310  
MP3         1.305   1.298                            
MP3=FULL         1.297   1.300                            
MP4   1.408     1.330     1.321 1.310         1.323              
B2PLYP         1.311   1.335             1.296              
B2PLYP=FULL   1.367     1.317   1.322                            
B2PLYP=FULLultrafine         1.314               1.308 1.303     1.304        
Configuration interaction CID   1.383 1.383 1.375 1.302     1.282                          
CISD   1.392 1.392 1.385 1.308     1.287                          
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-pCVDZ cc-pCVTZ daug-cc-pVTZ
Quadratic configuration interaction QCISD   1.417 1.417 1.417 1.329 1.329 1.335 1.306 1.306 1.303     1.315 1.305              
QCISD(T)         1.330     1.323         1.318 1.311   1.332 1.315        
Coupled Cluster CCD   1.392 1.392 1.386 1.312 1.312 1.318 1.291 1.291 1.289     1.299 1.292   1.311 1.294        
CCSD         1.318     1.314                          
CCSD(T)   1.421     1.328 1.341 1.349 1.321 1.321   1.317   1.316 1.308 1.305 1.329 1.312 1.307 1.329 1.320  
CCSD(T)=FULL         1.326               1.329 1.316 1.302 1.343 1.318 1.303 1.328 1.318  
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-pCVDZ cc-pCVTZ 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 1.351 1.290 1.351 1.289 1.351 1.351     1.272
density functional B1B95   1.325              
B3LYP 1.388 1.329 1.388 1.328 1.384 1.384     1.295
PBEPBE                 1.302
Moller Plesset perturbation MP2 1.403 1.325 1.400 1.324 1.402 1.402     1.289
Values that are outliers may reflect incorrect atom numbering for different levels of theory.
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