return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/6-31+G**
 hartrees
Energy at 0K-266.439409
Energy at 298.15K-266.443494
HF Energy-265.650298
Nuclear repulsion energy159.268780
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=FULL/6-31+G**
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' 3267 3069 2.96      
2 A' 3132 2942 0.27      
3 A' 3074 2887 57.30      
4 A' 1742 1636 18.69      
5 A' 1735 1629 116.76      
6 A' 1507 1416 16.23      
7 A' 1440 1353 31.69      
8 A' 1386 1302 2.00      
9 A' 1296 1217 16.32      
10 A' 1039 975 3.10      
11 A' 814 764 11.41      
12 A' 580 545 11.10      
13 A' 487 458 24.71      
14 A' 251 236 16.51      
15 A" 3222 3026 1.52      
16 A" 1509 1417 10.81      
17 A" 1082 1016 2.22      
18 A" 923 866 0.02      
19 A" 467 438 0.34      
20 A" 122 115 17.23      
21 A" 90 85 8.08      

Unscaled Zero Point Vibrational Energy (zpe) 14582.6 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 13695.9 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=FULL/6-31+G**
ABC
0.30306 0.14697 0.10080

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.838 -0.726 0.000
C2 0.000 0.546 0.000
C3 1.490 0.399 0.000
O4 -0.342 -1.846 0.000
O5 -0.601 1.620 0.000
H6 -1.925 -0.555 0.000
H7 1.951 1.381 0.000
H8 1.803 -0.170 0.874
H9 1.803 -0.170 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52322.58561.22502.35801.10043.49552.83752.8375
C21.52321.49722.41611.23102.21772.12232.12822.1282
C32.58561.49722.89702.42183.54581.08491.08911.0891
O41.22502.41612.89703.47572.04313.95822.85902.8590
O52.35801.23102.42183.47572.54622.56373.12273.1227
H61.10042.21773.54582.04312.54624.33283.84903.8490
H73.49552.12231.08493.95822.56374.33281.78621.7862
H82.83752.12821.08912.85903.12273.84901.78621.7486
H92.83752.12821.08912.85903.12273.84901.78621.7486

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 117.742 C1 C2 O5 117.376
C2 C1 O4 122.703 C2 C1 H6 114.440
C2 C3 H7 109.520 C2 C3 H8 109.740
C2 C3 H9 109.740 C3 C2 O5 124.882
O4 C1 H6 122.857 H7 C3 H8 110.504
H7 C3 H9 110.504 H8 C3 H9 106.796
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability