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

using model chemistry: CCD/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 CCD/6-31+G**
 hartrees
Energy at 0K-266.435410
Energy at 298.15K-266.439538
HF Energy-265.652865
Nuclear repulsion energy159.582637
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 CCD/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' 3246 3058 4.79      
2 A' 3124 2943 0.88      
3 A' 3083 2905 52.52      
4 A' 1847 1741 10.31      
5 A' 1831 1726 162.81      
6 A' 1516 1429 13.49      
7 A' 1454 1370 25.74      
8 A' 1403 1322 3.95      
9 A' 1306 1231 18.91      
10 A' 1050 990 3.26      
11 A' 816 769 10.19      
12 A' 590 556 11.88      
13 A' 496 467 28.48      
14 A' 254 239 16.75      
15 A" 3203 3018 3.89      
16 A" 1514 1426 9.30      
17 A" 1092 1029 1.86      
18 A" 931 877 0.05      
19 A" 471 444 0.82      
20 A" 125 118 16.51      
21 A" 94 89 10.30      

Unscaled Zero Point Vibrational Energy (zpe) 14722.6 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 13873.1 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 CCD/6-31+G**
ABC
0.30274 0.14759 0.10106

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.844 -0.727 0.000
C2 0.000 0.547 0.000
C3 1.496 0.398 0.000
O4 -0.353 -1.837 0.000
O5 -0.592 1.613 0.000
H6 -1.931 -0.555 0.000
H7 1.956 1.382 0.000
H8 1.811 -0.169 0.877
H9 1.811 -0.169 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52902.59691.21412.35391.10013.50612.85152.8515
C21.52901.50372.41071.21912.22332.12692.13582.1358
C32.59691.50372.90062.41633.55701.08651.09051.0905
O41.21412.41072.90063.45872.03363.96182.86952.8695
O52.35391.21912.41633.45872.54792.55903.11763.1176
H61.10012.22333.55702.03362.54794.34303.86253.8625
H73.50612.12691.08653.96182.55904.34301.78761.7876
H82.85152.13581.09052.86953.11763.86251.78761.7540
H92.85152.13581.09052.86953.11763.86251.78761.7540

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 117.804 C1 C2 O5 117.420
C2 C1 O4 122.591 C2 C1 H6 114.502
C2 C3 H7 109.341 C2 C3 H8 109.810
C2 C3 H9 109.810 C3 C2 O5 124.776
O4 C1 H6 122.907 H7 C3 H8 110.391
H7 C3 H9 110.391 H8 C3 H9 107.072
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability