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

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-266.400475
Energy at 298.15K-266.404604
HF Energy-265.642569
Nuclear repulsion energy159.343216
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**
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' 3273 3065 3.50      
2 A' 3141 2942 0.19      
3 A' 3062 2868 73.38      
4 A' 1768 1656 22.12      
5 A' 1755 1644 76.94      
6 A' 1517 1421 12.80      
7 A' 1443 1352 29.88      
8 A' 1389 1301 2.69      
9 A' 1299 1217 19.49      
10 A' 1038 972 3.40      
11 A' 814 763 11.40      
12 A' 581 544 10.31      
13 A' 483 453 25.63      
14 A' 252 236 16.82      
15 A" 3230 3025 2.10      
16 A" 1524 1427 8.98      
17 A" 1089 1020 2.35      
18 A" 928 869 0.11      
19 A" 468 438 0.46      
20 A" 139 131 14.85      
21 A" 99 93 5.40      

Unscaled Zero Point Vibrational Energy (zpe) 14646.9 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 13716.8 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**
ABC
0.30311 0.14728 0.10095

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.843 -0.719 0.000
C2 0.000 0.550 0.000
C3 1.490 0.379 0.000
O4 -0.352 -1.840 0.000
O5 -0.588 1.629 0.000
H6 -1.930 -0.534 0.000
H7 1.970 1.352 0.000
H8 1.795 -0.194 0.875
H9 1.795 -0.194 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52362.57871.22352.36171.10233.49322.82792.8279
C21.52361.50032.41541.22852.21342.12702.13092.1309
C32.57871.50032.88332.42543.53981.08541.08931.0893
O41.22352.41542.88333.47652.04803.94692.84222.8422
O52.36171.22852.42543.47652.54542.57273.12513.1251
H61.10232.21343.53982.04802.54544.33193.84073.8407
H73.49322.12701.08543.94692.57274.33191.78581.7858
H82.82792.13091.08932.84223.12513.84071.78581.7501
H92.82792.13091.08932.84223.12513.84071.78581.7501

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 117.025 C1 C2 O5 117.823
C2 C1 O4 122.733 C2 C1 H6 113.934
C2 C3 H7 109.648 C2 C3 H8 109.720
C2 C3 H9 109.720 C3 C2 O5 125.152
O4 C1 H6 123.333 H7 C3 H8 110.408
H7 C3 H9 110.408 H8 C3 H9 106.896
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability