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

using model chemistry: PBE1PBE/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 PBE1PBE/STO-3G
 hartrees
Energy at 0K-263.356599
Energy at 298.15K-263.360227
HF Energy-263.356599
Nuclear repulsion energy155.772954
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 PBE1PBE/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' 3550 3132 1.04      
2 A' 3357 2961 2.62      
3 A' 3243 2860 28.81      
4 A' 1863 1643 11.16      
5 A' 1846 1628 12.65      
6 A' 1660 1465 8.22      
7 A' 1541 1360 11.24      
8 A' 1432 1263 16.70      
9 A' 1278 1128 35.83      
10 A' 1072 946 4.28      
11 A' 806 711 5.94      
12 A' 580 512 4.86      
13 A' 462 407 11.91      
14 A' 219 193 6.06      
15 A" 3522 3107 0.84      
16 A" 1660 1464 6.53      
17 A" 1112 981 6.33      
18 A" 908 801 0.44      
19 A" 459 405 0.17      
20 A" 134 118 5.72      
21 A" 25 22 1.48      

Unscaled Zero Point Vibrational Energy (zpe) 15363.9 cm-1
Scaled (by 0.8821) Zero Point Vibrational Energy (zpe) 13552.5 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 PBE1PBE/STO-3G
ABC
0.29320 0.13897 0.09599

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.880 -0.721 0.000
C2 0.000 0.577 0.000
C3 1.526 0.328 0.000
O4 -0.412 -1.877 0.000
O5 -0.535 1.706 0.000
H6 -1.981 -0.499 0.000
H7 2.069 1.280 0.000
H8 1.807 -0.256 0.888
H9 1.807 -0.256 -0.888

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.56792.62441.24692.45141.12353.56412.86762.8676
C21.56791.54592.48761.24972.25472.18562.17832.1783
C32.62441.54592.93482.47943.60331.09661.09891.0989
O41.24692.48762.93483.58482.08844.01512.88752.8875
O52.45141.24972.47943.58482.63722.63913.18123.1812
H61.12352.25473.60332.08842.63724.42433.89843.8984
H73.56412.18561.09664.01512.63914.42431.79321.7932
H82.86762.17831.09892.88753.18123.89841.79321.7759
H92.86762.17831.09892.88753.18123.89841.79321.7759

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 114.875 C1 C2 O5 120.500
C2 C1 O4 123.799 C2 C1 H6 112.757
C2 C3 H7 110.443 C2 C3 H8 109.741
C2 C3 H9 109.741 C3 C2 O5 124.625
O4 C1 H6 123.444 H7 C3 H8 109.526
H7 C3 H9 109.526 H8 C3 H9 107.817
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.063      
2 C 0.139      
3 C -0.258      
4 O -0.151      
5 O -0.162      
6 H 0.076      
7 H 0.096      
8 H 0.098      
9 H 0.098      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.480 -0.054 0.000 0.483
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.605 1.129 0.000
y 1.129 -32.236 0.000
z 0.000 0.000 -25.026
Traceless
 xyz
x 4.026 1.129 0.000
y 1.129 -7.420 0.000
z 0.000 0.000 3.394
Polar
3z2-r26.789
x2-y27.631
xy1.129
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.063 -0.303 0.000
y -0.303 4.069 0.000
z 0.000 0.000 1.475


<r2> (average value of r2) Å2
<r2> 114.855
(<r2>)1/2 10.717