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

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-266.427596
Energy at 298.15K-266.431676
HF Energy-265.634280
Nuclear repulsion energy158.620511
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 MP4/6-31G*
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' 3188 3044        
2 A' 3071 2932        
3 A' 2978 2844        
4 A' 1747 1668        
5 A' 1723 1646        
6 A' 1506 1438        
7 A' 1434 1369        
8 A' 1363 1301        
9 A' 1282 1224        
10 A' 1028 981        
11 A' 798 762        
12 A' 570 544        
13 A' 477 455        
14 A' 248 237        
15 A" 3146 3003        
16 A" 1509 1441        
17 A" 1075 1026        
18 A" 913 871        
19 A" 462 441        
20 A" 135 129        
21 A" 107 103        

Unscaled Zero Point Vibrational Energy (zpe) 14379.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 13729.4 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 MP4/6-31G*
ABC
0.30036 0.14591 0.10003

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.847 -0.723 0.000
C2 0.000 0.554 0.000
C3 1.498 0.380 0.000
O4 -0.356 -1.847 0.000
O5 -0.588 1.635 0.000
H6 -1.943 -0.538 0.000
H7 1.980 1.362 0.000
H8 1.807 -0.196 0.882
H9 1.807 -0.196 -0.882

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53252.59141.22672.37291.11123.51292.84582.8458
C21.53251.50762.42701.23152.22872.13852.14572.1457
C32.59141.50762.89732.43463.56091.09401.09781.0978
O41.22672.42702.89733.49042.05743.96902.85992.8599
O52.37291.23152.43463.49042.56112.58283.14143.1414
H61.11122.22873.56092.05742.56114.35873.86703.8670
H73.51292.13851.09403.96902.58284.35871.79871.7987
H82.84582.14571.09782.85993.14143.86701.79871.7639
H92.84582.14571.09782.85993.14143.86701.79871.7639

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 116.950 C1 C2 O5 117.894
C2 C1 O4 122.810 C2 C1 H6 113.974
C2 C3 H7 109.545 C2 C3 H8 109.884
C2 C3 H9 109.884 C3 C2 O5 125.156
O4 C1 H6 123.216 H7 C3 H8 110.298
H7 C3 H9 110.298 H8 C3 H9 106.900
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability