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

using model chemistry: B3LYP/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 B3LYP/6-311G**
 hartrees
Energy at 0K-267.225629
Energy at 298.15K-267.229661
HF Energy-267.225629
Nuclear repulsion energy159.762213
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 B3LYP/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' 3150 3046 6.31      
2 A' 3040 2939 0.12      
3 A' 2921 2824 97.18      
4 A' 1810 1750 117.12      
5 A' 1798 1738 106.44      
6 A' 1458 1409 16.02      
7 A' 1391 1344 39.68      
8 A' 1354 1309 2.01      
9 A' 1237 1196 23.41      
10 A' 1008 975 2.71      
11 A' 775 750 14.41      
12 A' 571 552 13.95      
13 A' 483 467 24.86      
14 A' 247 239 15.96      
15 A" 3096 2993 3.78      
16 A" 1462 1413 11.53      
17 A" 1078 1043 2.89      
18 A" 907 877 0.58      
19 A" 471 455 0.25      
20 A" 134 129 15.53      
21 A" 67 65 5.56      

Unscaled Zero Point Vibrational Energy (zpe) 14227.8 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 13755.4 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 B3LYP/6-311G**
ABC
0.30337 0.14732 0.10100

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.735 0.000
C2 0.000 0.556 0.000
C3 1.496 0.401 0.000
O4 -0.359 -1.837 0.000
O5 -0.592 1.610 0.000
H6 -1.931 -0.541 0.000
H7 1.970 1.381 0.000
H8 1.812 -0.174 0.875
H9 1.812 -0.174 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53962.59691.20212.35801.10943.51682.84752.8475
C21.53961.50422.41981.20872.22082.13562.14062.1406
C32.59691.50422.90712.41263.55441.08871.09371.0937
O41.20212.41982.90713.45492.03803.97262.87132.8713
O52.35801.20872.41263.45492.53362.57143.11873.1187
H61.10942.22083.55442.03802.53364.34863.86163.8616
H73.51682.13561.08873.97262.57144.34861.79171.7917
H82.84752.14061.09372.87133.11873.86161.79171.7500
H92.84752.14061.09372.87133.11873.86161.79171.7500

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 117.114 C1 C2 O5 117.672
C2 C1 O4 123.441 C2 C1 H6 112.925
C2 C3 H7 109.868 C2 C3 H8 109.960
C2 C3 H9 109.960 C3 C2 O5 125.214
O4 C1 H6 123.635 H7 C3 H8 110.365
H7 C3 H9 110.365 H8 C3 H9 106.265
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.149      
2 C 0.132      
3 C -0.292      
4 O -0.247      
5 O -0.261      
6 H 0.102      
7 H 0.137      
8 H 0.139      
9 H 0.139      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.948 -0.046 0.000 0.949
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.387 2.068 0.000
y 2.068 -37.721 0.000
z 0.000 0.000 -27.395
Traceless
 xyz
x 6.171 2.068 0.000
y 2.068 -10.830 0.000
z 0.000 0.000 4.660
Polar
3z2-r29.319
x2-y211.334
xy2.068
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.242 -0.360 0.000
y -0.360 6.544 0.000
z 0.000 0.000 3.573


<r2> (average value of r2) Å2
<r2> 112.301
(<r2>)1/2 10.597