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

using model chemistry: MP2=FULL/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=FULL/6-31G
 hartrees
Energy at 0K-266.040155
Energy at 298.15K-266.044313
HF Energy-265.501454
Nuclear repulsion energy156.908844
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/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' 3192 3033 5.40      
2 A' 3074 2921 0.63      
3 A' 3054 2902 62.57      
4 A' 1613 1532 10.30      
5 A' 1578 1499 25.22      
6 A' 1536 1459 21.21      
7 A' 1475 1401 28.17      
8 A' 1374 1305 2.63      
9 A' 1292 1227 22.13      
10 A' 1050 998 2.52      
11 A' 801 761 12.03      
12 A' 583 554 9.94      
13 A' 487 463 23.56      
14 A' 256 243 18.19      
15 A" 3152 2995 4.34      
16 A" 1541 1464 12.12      
17 A" 1098 1043 3.62      
18 A" 927 881 0.28      
19 A" 472 448 0.11      
20 A" 145 138 19.10      
21 A" 106 101 4.34      

Unscaled Zero Point Vibrational Energy (zpe) 14402.7 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 13684.0 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
0.29582 0.14288 0.09811

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 -0.851 -0.720 0.000
C2 0.000 0.540 0.000
C3 1.504 0.394 0.000
O4 -0.346 -1.876 0.000
O5 -0.605 1.654 0.000
H6 -1.941 -0.552 0.000
H7 1.961 1.388 0.000
H8 1.834 -0.169 0.884
H9 1.834 -0.169 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52062.60551.26162.38681.10253.51522.88022.8802
C21.52061.51132.44081.26762.22692.13702.15592.1559
C32.60551.51132.92852.45693.57251.09471.09861.0986
O41.26162.44082.92853.53962.07293.99772.90672.9067
O52.38681.26762.45693.53962.57892.57993.17053.1705
H61.10252.22693.57252.07292.57894.35803.89593.8959
H73.51522.13701.09473.99772.57994.35801.79531.7953
H82.88022.15591.09862.90673.17053.89591.79531.7682
H92.88022.15591.09862.90673.17053.89591.79531.7682

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 118.487 C1 C2 O5 117.460
C2 C1 O4 122.357 C2 C1 H6 115.266
C2 C3 H7 109.128 C2 C3 H8 110.385
C2 C3 H9 110.385 C3 C2 O5 124.053
O4 C1 H6 122.377 H7 C3 H8 109.878
H7 C3 H9 109.878 H8 C3 H9 107.170
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability