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

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G
 hartrees
Energy at 0K-266.780433
Energy at 298.15K-266.784550
HF Energy-266.780433
Nuclear repulsion energy159.239343
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 HSEh1PBE/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' 3215 3075 3.46      
2 A' 3079 2945 0.04      
3 A' 3056 2924 62.93      
4 A' 1757 1681 11.45      
5 A' 1747 1672 134.72      
6 A' 1499 1434 20.37      
7 A' 1447 1384 52.86      
8 A' 1378 1319 2.14      
9 A' 1297 1240 23.89      
10 A' 1046 1000 4.48      
11 A' 820 785 13.00      
12 A' 594 568 10.17      
13 A' 492 470 26.26      
14 A' 256 245 19.73      
15 A" 3152 3016 1.28      
16 A" 1506 1440 17.09      
17 A" 1099 1052 7.67      
18 A" 938 898 0.10      
19 A" 486 465 0.00      
20 A" 153 146 20.63      
21 A" 59 56 4.77      

Unscaled Zero Point Vibrational Energy (zpe) 14537.8 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 13906.8 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 HSEh1PBE/6-31G
ABC
0.30330 0.14740 0.10103

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.837 -0.717 0.000
C2 0.000 0.542 0.000
C3 1.484 0.390 0.000
O4 -0.342 -1.844 0.000
O5 -0.600 1.625 0.000
H6 -1.923 -0.538 0.000
H7 1.961 1.369 0.000
H8 1.808 -0.183 0.876
H9 1.808 -0.183 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.51172.57061.23092.35401.10093.49002.83612.8361
C21.51171.49152.41071.23812.20552.12852.13572.1357
C32.57061.49152.88482.42263.53061.09001.09581.0958
O41.23092.41072.88483.47882.05053.95362.85412.8541
O52.35401.23812.42263.47882.53562.57413.13613.1361
H61.10092.20553.53062.05052.53564.32713.84823.8482
H73.49002.12851.09003.95362.57414.32711.78951.7895
H82.83612.13571.09582.85413.13613.84821.78951.7525
H92.83612.13571.09582.85413.13613.84821.78951.7525

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 117.724 C1 C2 O5 117.405
C2 C1 O4 122.709 C2 C1 H6 114.255
C2 C3 H7 110.105 C2 C3 H8 110.331
C2 C3 H9 110.331 C3 C2 O5 124.871
O4 C1 H6 123.037 H7 C3 H8 109.906
H7 C3 H9 109.906 H8 C3 H9 106.190
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.169      
2 C 0.309      
3 C -0.551      
4 O -0.360      
5 O -0.388      
6 H 0.183      
7 H 0.209      
8 H 0.214      
9 H 0.214      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.021 -0.050 0.000 1.022
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.747 2.432 0.000
y 2.432 -38.981 0.000
z 0.000 0.000 -27.287
Traceless
 xyz
x 7.387 2.432 0.000
y 2.432 -12.464 0.000
z 0.000 0.000 5.077
Polar
3z2-r210.155
x2-y213.234
xy2.432
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.415 -0.655 0.000
y -0.655 6.402 0.000
z 0.000 0.000 3.060


<r2> (average value of r2) Å2
<r2> 112.318
(<r2>)1/2 10.598