Geometry Comparison
CH2O2 (Dioxirane)
distance is atom 4 (O) to atom 5 (O)
Experimental bond length is 1.516 Å
original data displayed. press to display differences
differences displayed. press to display original data
Calculated bond length in Å
Methods with predefined basis sets
| semi-empirical |
AM1 |
1.346 |
| PM3 |
1.613 |
| PM6 |
1.468 |
| composite |
G2 |
1.447 |
| G3 |
1.447 |
| CBS-Q |
1.439 |
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 |
| hartree fock |
HF |
1.418 |
1.522 |
1.522 |
1.534 |
1.447 |
1.447 |
1.446 |
1.432 |
1.432 |
1.435 |
1.431 |
1.436 |
1.442 |
1.435 |
1.433 |
1.443 |
1.435 |
| density functional |
LSDA |
1.485 |
1.563 |
1.563 |
1.570 |
1.483 |
1.483 |
1.484 |
1.480 |
1.480 |
1.471 |
|
|
1.477 |
1.476 |
|
1.480 |
|
| SVWN |
|
1.563 |
|
|
1.483 |
|
1.484 |
|
|
|
|
|
|
|
|
|
|
| BLYP |
1.520 |
1.604 |
1.604 |
1.623 |
1.542 |
1.542 |
1.545 |
1.540 |
1.539 |
1.530 |
|
|
1.536 |
1.535 |
|
|
|
| B1B95 |
1.477 |
1.561 |
1.561 |
1.569 |
1.484 |
1.483 |
1.484 |
1.478 |
1.478 |
|
|
|
1.479 |
1.476 |
|
|
|
| B3LYP |
1.490 |
1.574 |
1.574 |
1.589 |
1.506 |
1.506 |
1.508 |
1.501 |
1.500 |
1.493 |
|
1.503 |
1.500 |
1.498 |
|
1.503 |
1.498 |
| B3LYPultrafine |
|
|
|
|
1.506 |
|
|
|
|
|
|
|
|
|
|
|
|
| B3PW91 |
1.482 |
1.565 |
1.565 |
1.576 |
1.490 |
1.490 |
1.491 |
1.484 |
1.484 |
1.479 |
|
|
1.485 |
1.482 |
|
|
|
| mPW1PW91 |
1.474 |
1.559 |
1.559 |
1.568 |
1.483 |
1.482 |
1.483 |
1.476 |
1.475 |
1.471 |
|
|
1.478 |
1.474 |
|
|
|
| M06-2X |
|
|
|
|
1.471 |
|
|
|
|
|
|
|
|
|
|
|
|
| PBEPBE |
1.505 |
1.589 |
1.589 |
1.603 |
1.516 |
1.516 |
1.518 |
1.513 |
1.512 |
1.504 |
|
|
1.512 |
1.509 |
|
|
1.509 |
| HSEh1PBE |
|
|
|
|
1.482 |
|
|
|
|
|
|
|
|
|
|
|
|
| Moller Plesset perturbation |
MP2FC |
1.490 |
1.614 |
1.614 |
1.649 |
1.531 |
1.532 |
1.538 |
1.513 |
1.514 |
1.511 |
|
1.523 |
1.522 |
1.510 |
|
1.540 |
1.514 |
| MP2FU |
1.489 |
1.614 |
1.614 |
1.649 |
1.530 |
1.531 |
1.537 |
1.511 |
1.512 |
1.509 |
|
|
1.522 |
1.505 |
|
|
|
| MP3 |
|
|
|
|
1.503 |
|
|
|
|
|
|
|
|
|
|
|
|
| MP4 |
|
1.629 |
|
|
1.548 |
|
|
|
|
|
|
|
|
|
|
|
|
| B2PLYP |
|
|
|
|
1.521 |
|
1.526 |
|
|
|
|
|
|
|
|
|
|
| Configuration interaction |
CID |
|
1.568 |
1.568 |
1.588 |
1.484 |
|
|
1.462 |
|
|
|
|
|
|
|
|
|
| CISD |
|
1.576 |
1.576 |
1.601 |
1.490 |
|
|
1.468 |
|
|
|
|
|
|
|
|
|
| Quadratic configuration interaction |
QCISD |
1.496 |
1.609 |
1.609 |
1.648 |
1.522 |
1.523 |
1.526 |
1.500 |
1.502 |
1.499 |
|
|
1.515 |
|
|
|
|
| QCISD(T) |
|
|
|
|
1.544 |
|
1.550 |
|
1.525 |
|
|
|
|
|
|
|
|
| Coupled Cluster |
CCD |
1.490 |
1.589 |
1.589 |
1.614 |
1.507 |
1.507 |
1.509 |
1.484 |
1.485 |
1.484 |
|
|
1.497 |
|
|
|
|
| CCSD |
|
|
|
|
1.520 |
|
1.523 |
|
1.499 |
|
|
|
|
|
|
|
|
| CCSD(T) |
|
|
|
|
1.544 |
|
1.549 |
|
1.524 |
|
|
|
|
|
|
|
|
Calculated bond length in Å
Methods with effective core potentials (select basis sets)
|
|
CEP-31G |
CEP-31G* |
CEP-121G |
CEP-121G* |
LANL2DZ |
SDD |
| hartree fock |
HF |
1.514 |
1.450 |
1.518 |
1.451 |
1.516 |
1.516 |
| density functional |
B1B95 |
1.551 |
1.485 |
|
|
|
|
| B3LYP |
1.577 |
1.515 |
1.580 |
1.516 |
1.574 |
1.574 |
| Moller Plesset perturbation |
MP2FC |
1.641 |
1.539 |
1.641 |
1.539 |
1.640 |
1.639 |
Values that are outliers may reflect different atom numbering for
different levels of theory.
Please use the error
report form to report problems.
