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

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G3
 hartrees
Energy at 0K-266.979158
Energy at 298.15K-266.972519
HF Energy-265.641391
Nuclear repulsion energy161.387626
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 HF/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' 3332 3139 8.91      
2 A' 3225 3038 0.14      
3 A' 3222 3036 67.32      
4 A' 2050 1931 6.01      
5 A' 2019 1902 306.80      
6 A' 1604 1512 12.85      
7 A' 1556 1466 23.26      
8 A' 1490 1404 9.01      
9 A' 1379 1299 28.19      
10 A' 1118 1053 5.14      
11 A' 848 799 10.95      
12 A' 627 591 16.00      
13 A' 526 496 37.98      
14 A' 270 254 20.00      
15 A" 3288 3098 7.55      
16 A" 1611 1518 8.60      
17 A" 1194 1125 2.18      
18 A" 1014 955 0.62      
19 A" 515 486 2.66      
20 A" 143 135 20.60      
21 A" 110 104 10.91      

Unscaled Zero Point Vibrational Energy (zpe) 15569.8 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 14669.9 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=FULL/6-31G*
ABC
0.30312 0.14747 0.10105

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.842 -0.719 0.000
C2 0.000 0.550 0.000
C3 1.489 0.379 0.000
O4 -0.350 -1.839 0.000
O5 -0.589 1.627 0.000
H6 -1.933 -0.537 0.000
H7 1.970 1.357 0.000
H8 1.798 -0.195 0.878
H9 1.798 -0.195 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52242.57661.22292.35941.10623.49492.83032.8303
C21.52241.49882.41381.22792.21752.12872.13462.1346
C32.57661.49882.88142.42403.54261.08961.09351.0935
O41.22292.41382.88143.47382.04913.94912.84322.8432
O52.35941.22792.42403.47382.54732.57293.12853.1285
H61.10622.21753.54262.04912.54734.33803.84763.8476
H73.49492.12871.08963.94912.57294.33801.79181.7918
H82.83032.13461.09352.84323.12853.84761.79181.7555
H92.83032.13461.09352.84323.12853.84761.79181.7555

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 117.559 C1 C2 O5 117.507
C2 C1 O4 122.695 C2 C1 H6 114.057
C2 C3 H7 109.482 C2 C3 H8 110.050
C2 C3 H9 110.050 C3 C2 O5 124.934
O4 C1 H6 123.248 H7 C3 H8 110.091
H7 C3 H9 110.091 H8 C3 H9 107.049
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability