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

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-264.705878
Energy at 298.15K-264.710000
HF Energy-264.134706
Nuclear repulsion energy156.882887
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 MP4/3-21G
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' 3145 3050        
2 A' 3045 2953        
3 A' 2931 2843        
4 A' 1627 1577        
5 A' 1573 1526        
6 A' 1530 1484        
7 A' 1453 1409        
8 A' 1350 1309        
9 A' 1197 1161        
10 A' 1000 970        
11 A' 742 720        
12 A' 555 538        
13 A' 454 440        
14 A' 245 238        
15 A" 3107 3013        
16 A" 1552 1505        
17 A" 1105 1072        
18 A" 948 920        
19 A" 494 479        
20 A" 191 185        
21 A" 83 81        

Unscaled Zero Point Vibrational Energy (zpe) 14163.8 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 13736.1 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 MP4/3-21G
ABC
0.29585 0.14293 0.09815

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.866 -0.705 0.000
C2 0.000 0.572 0.000
C3 1.503 0.311 0.000
O4 -0.372 -1.857 0.000
O5 -0.561 1.695 0.000
H6 -1.953 -0.487 0.000
H7 2.044 1.264 0.000
H8 1.776 -0.278 0.887
H9 1.776 -0.278 -0.887

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54342.57791.25332.42001.10813.51372.81992.8199
C21.54341.52512.45691.25572.22172.15752.15972.1597
C32.57791.52512.86572.48493.54661.09571.09941.0994
O41.25332.45692.86573.55712.09183.94612.80892.8089
O52.42001.25572.48493.55712.58882.64003.18513.1851
H61.10812.22173.54662.09182.58884.36343.83883.8388
H73.51372.15751.09573.94612.64004.36341.79921.7992
H82.81992.15971.09942.80893.18513.83881.79921.7732
H92.81992.15971.09942.80893.18513.83881.79921.7732

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 114.305 C1 C2 O5 119.313
C2 C1 O4 122.592 C2 C1 H6 112.810
C2 C3 H7 109.734 C2 C3 H8 109.688
C2 C3 H9 109.688 C3 C2 O5 126.382
O4 C1 H6 124.598 H7 C3 H8 110.098
H7 C3 H9 110.098 H8 C3 H9 107.504
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability