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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-266.381069
Energy at 298.15K-266.385252
HF Energy-265.638648
Nuclear repulsion energy159.893029
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 MP3/6-31G*
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' 3234 3035 3.59      
2 A' 3117 2926 0.15      
3 A' 3066 2877 58.51      
4 A' 1880 1765 23.03      
5 A' 1868 1753 123.73      
6 A' 1524 1430 14.15      
7 A' 1460 1370 34.79      
8 A' 1404 1318 3.89      
9 A' 1317 1236 20.40      
10 A' 1052 988 4.68      
11 A' 823 773 10.02      
12 A' 597 560 11.12      
13 A' 497 467 29.76      
14 A' 257 241 17.84      
15 A" 3189 2994 2.44      
16 A" 1523 1430 10.85      
17 A" 1101 1033 3.47      
18 A" 937 880 0.04      
19 A" 476 447 0.51      
20 A" 142 133 15.91      
21 A" 109 102 7.39      

Unscaled Zero Point Vibrational Energy (zpe) 14786.2 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 13878.3 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 MP3/6-31G*
ABC
0.30329 0.14867 0.10164

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.847 -0.720 0.000
C2 0.000 0.548 0.000
C3 1.494 0.382 0.000
O4 -0.358 -1.827 0.000
O5 -0.582 1.615 0.000
H6 -1.937 -0.542 0.000
H7 1.968 1.364 0.000
H8 1.805 -0.191 0.879
H9 1.805 -0.191 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52492.58711.21082.34951.10433.50202.84372.8437
C21.52491.50302.40231.21522.22262.13012.13932.1393
C32.58711.50302.88242.41463.55291.09021.09431.0943
O41.21082.40232.88243.44942.03623.94852.85132.8513
O52.34951.21522.41463.44942.54682.56263.11963.1196
H61.10432.22263.55292.03622.54684.34503.85993.8599
H73.50202.13011.09023.94852.56264.34501.79291.7929
H82.84372.13931.09432.85133.11963.85991.79291.7583
H92.84372.13931.09432.85133.11963.85991.79291.7583

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 117.392 C1 C2 O5 117.619
C2 C1 O4 122.419 C2 C1 H6 114.477
C2 C3 H7 109.427 C2 C3 H8 109.916
C2 C3 H9 109.916 C3 C2 O5 124.989
O4 C1 H6 123.103 H7 C3 H8 110.321
H7 C3 H9 110.321 H8 C3 H9 106.912
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability