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

using model chemistry: MP2=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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-266.421013
Energy at 298.15K-266.425155
HF Energy-265.642885
Nuclear repulsion energy159.510423
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/6-31G**
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' 3277 3062 3.38      
2 A' 3144 2938 0.17      
3 A' 3065 2864 73.09      
4 A' 1773 1657 23.12      
5 A' 1760 1644 76.35      
6 A' 1519 1419 12.86      
7 A' 1446 1351 30.71      
8 A' 1391 1300 2.63      
9 A' 1301 1215 19.28      
10 A' 1039 971 3.46      
11 A' 816 762 11.40      
12 A' 582 544 10.34      
13 A' 484 453 25.51      
14 A' 252 236 16.87      
15 A" 3234 3022 1.97      
16 A" 1526 1426 9.14      
17 A" 1093 1022 2.41      
18 A" 932 871 0.13      
19 A" 472 441 0.45      
20 A" 142 132 15.07      
21 A" 101 94 5.16      

Unscaled Zero Point Vibrational Energy (zpe) 14673.9 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 13711.3 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 MP2=FULL/6-31G**
ABC
0.30384 0.14758 0.10117

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.842 -0.718 0.000
C2 0.000 0.550 0.000
C3 1.488 0.377 0.000
O4 -0.351 -1.838 0.000
O5 -0.587 1.628 0.000
H6 -1.927 -0.533 0.000
H7 1.969 1.349 0.000
H8 1.792 -0.196 0.874
H9 1.792 -0.196 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52182.57471.22242.35961.10143.48902.82332.8233
C21.52181.49842.41331.22742.21082.12512.12832.1283
C32.57471.49842.87932.42313.53511.08421.08821.0882
O41.22242.41332.87933.47362.04613.94202.83752.8375
O52.35961.22742.42313.47362.54292.57113.12203.1220
H61.10142.21083.53512.04612.54294.32733.83523.8352
H73.48902.12511.08423.94202.57114.32731.78391.7839
H82.82332.12831.08822.83753.12203.83521.78391.7479
H92.82332.12831.08822.83753.12203.83521.78391.7479

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 116.965 C1 C2 O5 117.854
C2 C1 O4 122.764 C2 C1 H6 113.913
C2 C3 H7 109.696 C2 C3 H8 109.719
C2 C3 H9 109.719 C3 C2 O5 125.181
O4 C1 H6 123.323 H7 C3 H8 110.402
H7 C3 H9 110.402 H8 C3 H9 106.860
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability