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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CBS-Q
 hartrees
Energy at 0K-266.759668
Energy at 298.15K-266.753109
HF Energy-265.641004
Nuclear repulsion energy161.440184
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 CBS-Q
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' 3320 3320 9.02      
2 A' 3208 3208 1.11      
3 A' 3193 3193 72.47      
4 A' 2047 2047 5.81      
5 A' 2017 2017 337.94      
6 A' 1596 1596 13.25      
7 A' 1541 1541 23.92      
8 A' 1481 1481 9.02      
9 A' 1369 1369 28.02      
10 A' 1110 1110 5.09      
11 A' 843 843 11.06      
12 A' 624 624 15.85      
13 A' 524 524 37.17      
14 A' 268 268 19.53      
15 A" 3276 3276 7.41      
16 A" 1602 1602 8.38      
17 A" 1190 1190 2.13      
18 A" 1006 1006 0.92      
19 A" 515 515 2.72      
20 A" 148 148 18.18      
21 A" 114 114 12.18      

Unscaled Zero Point Vibrational Energy (zpe) 15496.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15496.0 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 CBS-Q
ABC
0.30192 0.14701 0.10071

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.846 -0.724 0.000
C2 0.000 0.549 0.000
C3 1.496 0.387 0.000
O4 -0.374 -1.807 0.000
O5 -0.571 1.589 0.000
H6 -1.925 -0.541 0.000
H7 1.966 1.364 0.000
H8 1.809 -0.179 0.874
H9 1.809 -0.179 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52882.59231.18122.32941.09463.50232.84792.8479
C21.52881.50482.38561.18632.21262.12812.13702.1370
C32.59231.50482.88272.39133.54501.08371.08741.0874
O41.18122.38562.88273.40162.00213.94042.85992.8599
O52.32941.18632.39133.40162.52422.54743.09113.0911
H61.09462.21263.54502.00212.52424.33263.85233.8523
H73.50232.12811.08373.94042.54744.33261.77981.7798
H82.84792.13701.08742.85993.09113.85231.77981.7483
H92.84792.13701.08742.85993.09113.85231.77981.7483

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 117.410 C1 C2 O5 117.620
C2 C1 O4 122.843 C2 C1 H6 113.984
C2 C3 H7 109.523 C2 C3 H8 110.012
C2 C3 H9 110.012 C3 C2 O5 124.970
O4 C1 H6 123.173 H7 C3 H8 110.127
H7 C3 H9 110.127 H8 C3 H9 107.011
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability