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: MP4/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-266.483609
Energy at 298.15K-266.487681
HF Energy-265.657305
Nuclear repulsion energy158.283120
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/cc-pVDZ
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 3083        
2 A' 3065 2963        
3 A' 2950 2852        
4 A' 1748 1691        
5 A' 1726 1669        
6 A' 1448 1400        
7 A' 1384 1339        
8 A' 1342 1298        
9 A' 1255 1214        
10 A' 1002 969        
11 A' 791 764        
12 A' 563 545        
13 A' 470 455        
14 A' 243 235        
15 A" 3149 3045        
16 A" 1459 1411        
17 A" 1064 1029        
18 A" 901 871        
19 A" 466 451        
20 A" 146 141        
21 A" 92 89        

Unscaled Zero Point Vibrational Energy (zpe) 14226.7 cm-1
Scaled (by 0.9669) Zero Point Vibrational Energy (zpe) 13755.8 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/cc-pVDZ
ABC
0.29904 0.14509 0.09952

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.851 -0.725 0.000
C2 0.000 0.561 0.000
C3 1.504 0.370 0.000
O4 -0.369 -1.848 0.000
O5 -0.578 1.644 0.000
H6 -1.954 -0.520 0.000
H7 2.004 1.352 0.000
H8 1.805 -0.217 0.887
H9 1.805 -0.217 -0.887

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54192.59671.22232.38401.12213.53072.84592.8459
C21.54191.51562.43711.22742.23302.15482.15642.1564
C32.59671.51562.90282.44053.57041.10191.10551.1055
O41.22232.43712.90283.49792.06843.98382.85882.8588
O52.38401.22742.44053.49792.56362.59943.15103.1510
H61.12212.23303.57042.06842.56364.37863.87423.8742
H73.53072.15481.10193.98382.59944.37861.81291.8129
H82.84592.15641.10552.85883.15103.87421.81291.7738
H92.84592.15641.10552.85883.15103.87421.81291.7738

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 116.266 C1 C2 O5 118.389
C2 C1 O4 123.271 C2 C1 H6 112.956
C2 C3 H7 109.812 C2 C3 H8 109.717
C2 C3 H9 109.717 C3 C2 O5 125.345
O4 C1 H6 123.773 H7 C3 H8 110.427
H7 C3 H9 110.427 H8 C3 H9 106.691
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability