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

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-266.553110
Energy at 298.15K-266.557228
HF Energy-265.664519
Nuclear repulsion energy159.883393
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 MP2/6-31G(2df,p)
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' 3243 3063 1.79      
2 A' 3114 2941 0.05      
3 A' 3016 2848 64.66      
4 A' 1773 1675 41.17      
5 A' 1765 1667 73.28      
6 A' 1481 1398 14.21      
7 A' 1408 1330 35.02      
8 A' 1371 1295 1.72      
9 A' 1277 1206 17.62      
10 A' 1018 961 4.47      
11 A' 806 761 11.61      
12 A' 574 542 9.31      
13 A' 474 448 25.06      
14 A' 245 232 16.20      
15 A" 3200 3023 0.28      
16 A" 1489 1406 9.27      
17 A" 1087 1026 2.86      
18 A" 919 868 0.63      
19 A" 473 446 0.30      
20 A" 146 138 12.25      
21 A" 100 94 6.79      

Unscaled Zero Point Vibrational Energy (zpe) 14489.0 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 13684.8 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 MP2/6-31G(2df,p)
ABC
0.30428 0.14835 0.10158

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.842 -0.718 0.000
C2 0.000 0.555 0.000
C3 1.489 0.370 0.000
O4 -0.358 -1.829 0.000
O5 -0.581 1.625 0.000
H6 -1.930 -0.524 0.000
H7 1.985 1.338 0.000
H8 1.786 -0.212 0.875
H9 1.786 -0.212 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52562.57201.21222.35671.10593.49482.81492.8149
C21.52561.50052.41101.21702.21132.13362.13122.1312
C32.57201.50052.87232.42013.53431.08751.09171.0917
O41.21222.41102.87233.46102.04353.93982.82462.8246
O52.35671.21702.42013.46102.53722.58123.12043.1204
H61.10592.21133.53432.04352.53724.33523.83043.8304
H73.49482.13361.08753.93982.58124.33521.79081.7908
H82.81492.13121.09172.82463.12043.83041.79081.7493
H92.81492.13121.09172.82463.12043.83041.79081.7493

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 116.404 C1 C2 O5 118.030
C2 C1 O4 123.024 C2 C1 H6 113.383
C2 C3 H7 110.038 C2 C3 H8 109.595
C2 C3 H9 109.595 C3 C2 O5 125.566
O4 C1 H6 123.593 H7 C3 H8 110.526
H7 C3 H9 110.526 H8 C3 H9 106.497
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability