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

using model chemistry: MP2/CEP-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/CEP-31G
 hartrees
Energy at 0K-50.490793
Energy at 298.15K-50.494829
HF Energy-50.021572
Nuclear repulsion energy82.951730
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/CEP-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' 3183 3076 17.64      
2 A' 3051 2948 65.35      
3 A' 3048 2945 21.09      
4 A' 1566 1513 12.73      
5 A' 1526 1475 30.92      
6 A' 1490 1440 25.68      
7 A' 1452 1403 24.46      
8 A' 1332 1287 1.85      
9 A' 1274 1231 22.31      
10 A' 1035 1000 2.66      
11 A' 784 758 9.67      
12 A' 563 544 9.85      
13 A' 465 450 24.23      
14 A' 237 229 17.67      
15 A" 3147 3041 19.70      
16 A" 1494 1444 14.81      
17 A" 1082 1045 3.83      
18 A" 893 863 1.73      
19 A" 460 445 0.05      
20 A" 137 132 25.61      
21 A" 102 98 3.98      

Unscaled Zero Point Vibrational Energy (zpe) 14161.1 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 13683.9 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/CEP-31G
ABC
0.28551 0.13700 0.09424

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.862 -0.746 0.000
C2 0.000 0.555 0.000
C3 1.533 0.419 0.000
O4 -0.346 -1.918 0.000
O5 -0.627 1.680 0.000
H6 -1.964 -0.578 0.000
H7 1.991 1.426 0.000
H8 1.864 -0.152 0.892
H9 1.864 -0.152 -0.892

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.56022.66321.28092.43671.11483.58532.92932.9293
C21.56021.53922.49681.28782.26752.17302.18442.1844
C32.66321.53922.99852.50123.63661.10641.10971.1097
O41.28092.49682.99853.60862.10104.07952.96622.9662
O52.43671.28782.50123.60862.62402.62993.21853.2185
H61.11482.26753.63662.10102.62404.43373.95413.9541
H73.58532.17301.10644.07952.62994.43371.81741.8174
H82.92932.18441.10972.96623.21853.95411.81741.7840
H92.92932.18441.10972.96623.21853.95411.81741.7840

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 118.467 C1 C2 O5 117.327
C2 C1 O4 122.698 C2 C1 H6 114.890
C2 C3 H7 109.353 C2 C3 H8 110.047
C2 C3 H9 110.047 C3 C2 O5 124.206
O4 C1 H6 122.412 H7 C3 H8 110.190
H7 C3 H9 110.190 H8 C3 H9 106.990
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability