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

using model chemistry: MP2/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G**
 hartrees
Energy at 0K-266.513597
Energy at 298.15K-266.517749
HF Energy-265.706001
Nuclear repulsion energy159.502657
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 MP2/6-311G**
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' 3215 3055 4.14      
2 A' 3090 2936 0.44      
3 A' 2996 2847 86.03      
4 A' 1763 1675 30.58      
5 A' 1755 1667 89.23      
6 A' 1478 1405 13.78      
7 A' 1409 1339 35.76      
8 A' 1375 1307 2.09      
9 A' 1272 1208 17.53      
10 A' 1020 969 2.81      
11 A' 803 763 12.25      
12 A' 578 549 10.68      
13 A' 483 459 24.69      
14 A' 252 239 15.02      
15 A" 3173 3015 2.84      
16 A" 1487 1413 10.67      
17 A" 1081 1027 1.92      
18 A" 918 872 0.15      
19 A" 470 447 0.20      
20 A" 143 136 11.76      
21 A" 107 102 6.96      

Unscaled Zero Point Vibrational Energy (zpe) 14434.1 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 13715.3 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 MP2/6-311G**
ABC
0.30335 0.14727 0.10098

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.844 -0.723 0.000
C2 0.000 0.556 0.000
C3 1.494 0.377 0.000
O4 -0.361 -1.836 0.000
O5 -0.580 1.627 0.000
H6 -1.935 -0.530 0.000
H7 1.981 1.351 0.000
H8 1.794 -0.203 0.877
H9 1.794 -0.203 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53222.58361.21302.36461.10813.50502.82852.8285
C21.53221.50432.41831.21832.21932.13482.13612.1361
C32.58361.50432.88672.42153.54701.08971.09361.0936
O41.21302.41832.88673.46932.04523.95482.84232.8423
O52.36461.21832.42153.46932.54762.57613.12313.1231
H61.10812.21933.54702.04522.54764.34513.84513.8451
H73.50502.13481.08973.95482.57614.34511.79451.7945
H82.82852.13611.09362.84233.12313.84511.79451.7549
H92.82852.13611.09362.84233.12313.84511.79451.7549

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 116.603 C1 C2 O5 118.121
C2 C1 O4 123.082 C2 C1 H6 113.424
C2 C3 H7 109.737 C2 C3 H8 109.612
C2 C3 H9 109.612 C3 C2 O5 125.276
O4 C1 H6 123.494 H7 C3 H8 110.557
H7 C3 H9 110.557 H8 C3 H9 106.715
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability