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

using model chemistry: QCISD(T)/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-190.708515
Energy at 298.15K-190.713709
HF Energy-189.992260
Nuclear repulsion energy81.364757
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 QCISD(T)/aug-cc-pVTZ
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 3810 3684        
2 A 3050 2949        
3 A 1540 1489        
4 A 1398 1351        
5 A 1210 1170        
6 A 1043 1008        
7 A 556 538        
8 A 370 358        
9 B 3810 3683        
10 B 3104 3000        
11 B 1450 1402        
12 B 1376 1331        
13 B 1084 1048        
14 B 1011 977        
15 B 358 346        

Unscaled Zero Point Vibrational Energy (zpe) 12585.3 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 12167.5 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 QCISD(T)/aug-cc-pVTZ
ABC
1.38945 0.33945 0.30067

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.533
O2 0.000 1.172 -0.249
O3 0.000 -1.172 -0.249
H4 -0.893 -0.071 1.158
H5 0.893 0.071 1.158
H6 -0.812 1.172 -0.768
H7 0.812 -1.172 -0.768

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5 H6 H7
C11.40891.40891.09231.09231.93051.9305
O21.40892.34412.07891.99720.96402.5346
O31.40892.34411.99722.07892.53460.9640
H41.09232.07891.99721.79162.29422.7983
H51.09231.99722.07891.79162.79832.2942
H61.93050.96402.53462.29422.79832.8516
H71.93052.53460.96402.79832.29422.8516

picture of methanediol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H6 107.406 C1 O3 H7 107.406
O2 C1 O3 112.594 O2 C1 H4 111.818
O2 C1 H5 105.271 O3 C1 H4 105.271
O3 C1 H5 111.818 H4 C1 H5 110.190
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability