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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-189.172861
Energy at 298.15K-189.178119
HF Energy-188.843644
Nuclear repulsion energy79.315431
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 MP2/3-21G*
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 3522 3350 1.66      
2 A 3098 2947 56.43      
3 A 1623 1544 2.54      
4 A 1438 1368 2.67      
5 A 1238 1178 2.74      
6 A 974 926 109.95      
7 A 570 542 141.68      
8 A 397 377 21.67      
9 B 3523 3351 3.89      
10 B 3150 2997 60.69      
11 B 1487 1415 48.28      
12 B 1407 1338 21.83      
13 B 1041 991 112.05      
14 B 1022 972 88.36      
15 B 412 392 236.77      

Unscaled Zero Point Vibrational Energy (zpe) 12450.4 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 11844.1 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 MP2/3-21G*
ABC
1.33935 0.32010 0.28340

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
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
C11.44971.44971.09271.09271.98291.9829
O21.44972.42012.12792.01620.99282.5970
O31.44972.42012.01622.12792.59700.9928
H41.09272.12792.01621.79042.36552.8390
H51.09272.01622.12791.79042.83902.3655
H61.98290.99282.59702.36552.83902.8900
H71.98292.59700.99282.83902.36552.8900

picture of methanediol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H6 107.059 C1 O3 H7 107.059
O2 C1 O3 113.162 O2 C1 H4 112.885
O2 C1 H5 104.052 O3 C1 H4 104.052
O3 C1 H5 112.885 H4 C1 H5 110.016
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability