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All results from a given calculation for C3H4O2 (Methyl glyoxal)

using model chemistry: MP4=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4=FULL/6-31G*
 hartrees
Energy at 0K-266.446979
Energy at 298.15K-266.451072
HF Energy-265.634647
Nuclear repulsion energy158.766706
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 MP4=FULL/6-31G*
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' 3189 3066        
2 A' 3072 2954        
3 A' 2979 2864        
4 A' 1752 1685        
5 A' 1728 1662        
6 A' 1506 1449        
7 A' 1436 1381        
8 A' 1364 1312        
9 A' 1283 1234        
10 A' 1029 989        
11 A' 800 769        
12 A' 571 549        
13 A' 478 460        
14 A' 248 239        
15 A" 3146 3026        
16 A" 1510 1452        
17 A" 1078 1037        
18 A" 916 881        
19 A" 465 447        
20 A" 136 131        
21 A" 109 104        

Unscaled Zero Point Vibrational Energy (zpe) 14397.2 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 13844.3 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 MP4=FULL/6-31G*
ABC
0.30102 0.14618 0.10023

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.846 -0.722 0.000
C2 0.000 0.553 0.000
C3 1.496 0.379 0.000
O4 -0.356 -1.845 0.000
O5 -0.587 1.635 0.000
H6 -1.942 -0.537 0.000
H7 1.980 1.359 0.000
H8 1.804 -0.198 0.881
H9 1.804 -0.198 -0.881

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53082.58771.22562.37101.11103.50972.84202.8420
C21.53081.50582.42501.23042.22672.13742.14402.1440
C32.58771.50582.89362.43223.55701.09371.09751.0975
O41.22562.42502.89363.48762.05613.96532.85592.8559
O52.37101.23042.43223.48762.55912.58163.13923.1392
H61.11102.22673.55702.05612.55914.35563.86313.8631
H73.50972.13741.09373.96532.58164.35561.79801.7980
H82.84202.14401.09752.85593.13923.86311.79801.7629
H92.84202.14401.09752.85593.13923.86311.79801.7629

picture of Methyl glyoxal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 116.894 C1 C2 O5 117.930
C2 C1 O4 122.845 C2 C1 H6 113.951
C2 C3 H7 109.600 C2 C3 H8 109.898
C2 C3 H9 109.898 C3 C2 O5 125.176
O4 C1 H6 123.204 H7 C3 H8 110.277
H7 C3 H9 110.277 H8 C3 H9 106.857
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability