return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2(OH)2 (methanediol)

using model chemistry: MP2=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2=FULL/3-21G
 hartrees
Energy at 0K-189.178170
Energy at 298.15K-189.183437
HF Energy-188.843679
Nuclear repulsion energy79.327288
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2=FULL/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3523 3363 1.68      
2 A 3098 2958 56.35      
3 A 1623 1549 2.52      
4 A 1438 1373 2.66      
5 A 1238 1182 2.73      
6 A 974 930 110.02      
7 A 570 545 141.74      
8 A 397 379 21.76      
9 B 3524 3364 3.91      
10 B 3151 3008 60.56      
11 B 1488 1420 48.05      
12 B 1407 1343 21.94      
13 B 1042 995 112.70      
14 B 1022 976 87.86      
15 B 412 393 236.89      

Unscaled Zero Point Vibrational Energy (zpe) 12452.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 11889.6 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/3-21G
ABC
1.33976 0.32021 0.28349

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.547
O2 0.000 1.210 -0.251
O3 0.000 -1.210 -0.251
H4 -0.890 -0.096 1.174
H5 0.890 0.096 1.174
H6 -0.820 1.190 -0.810
H7 0.820 -1.190 -0.810

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5 H6 H7
C11.44951.44951.09261.09261.98281.9828
O21.44952.41962.12762.01590.99272.5969
O31.44952.41962.01592.12762.59690.9927
H41.09262.12762.01591.79012.36532.8388
H51.09262.01592.12761.79012.83882.3653
H61.98280.99272.59692.36532.83882.8901
H71.98282.59690.99272.83882.36532.8901

picture of methanediol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H6 107.073 C1 O3 H7 107.073
O2 C1 O3 113.163 O2 C1 H4 112.885
O2 C1 H5 104.055 O3 C1 H4 104.055
O3 C1 H5 112.885 H4 C1 H5 110.007
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability