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

using model chemistry: MP2=FULL/STO-3G

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=FULL/STO-3G
 hartrees
Energy at 0K-262.465091
Energy at 298.15K-262.468805
HF Energy-262.162557
Nuclear repulsion energy154.091255
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=FULL/STO-3G
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' 3562 3166 0.22      
2 A' 3370 2996 0.05      
3 A' 3290 2924 34.74      
4 A' 1751 1557 5.15      
5 A' 1705 1515 3.34      
6 A' 1688 1500 8.97      
7 A' 1581 1406 1.49      
8 A' 1444 1283 24.43      
9 A' 1296 1152 36.02      
10 A' 1089 968 3.26      
11 A' 809 719 4.96      
12 A' 579 515 4.82      
13 A' 460 409 11.68      
14 A' 218 194 4.48      
15 A" 3548 3153 0.18      
16 A" 1706 1517 2.58      
17 A" 1133 1007 2.49      
18 A" 904 804 0.23      
19 A" 454 403 0.04      
20 A" 133 119 4.40      
21 A" 76 67 1.49      

Unscaled Zero Point Vibrational Energy (zpe) 15397.3 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 13686.7 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/STO-3G
ABC
0.28767 0.13570 0.09385

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.895 -0.724 0.000
C2 0.000 0.579 0.000
C3 1.543 0.324 0.000
O4 -0.425 -1.898 0.000
O5 -0.529 1.730 0.000
H6 -1.999 -0.506 0.000
H7 2.090 1.282 0.000
H8 1.829 -0.258 0.893
H9 1.829 -0.258 -0.893

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.58052.65341.26462.48071.12513.59602.90432.9043
C21.58051.56362.51321.26652.27462.20482.20082.2008
C32.65341.56362.96842.50363.63771.10301.10381.1038
O41.26462.51322.96843.62922.10044.05442.92752.9275
O52.48071.26652.50363.62922.67612.65683.21083.2108
H61.12512.27463.63772.10042.67614.46273.93863.9386
H73.59602.20481.10304.05442.65684.46271.79911.7991
H82.90432.20081.10382.92753.21083.93861.79911.7859
H92.90432.20081.10382.92753.21083.93861.79911.7859

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 115.108 C1 C2 O5 120.823
C2 C1 O4 123.718 C2 C1 H6 113.357
C2 C3 H7 110.353 C2 C3 H8 109.998
C2 C3 H9 109.998 C3 C2 O5 124.069
O4 C1 H6 122.924 H7 C3 H8 109.226
H7 C3 H9 109.226 H8 C3 H9 107.995
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability