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

using model chemistry: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-266.841422
Energy at 298.15K-266.845283
HF Energy-266.841422
Nuclear repulsion energy158.483438
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 PBEPBE/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' 3119 3075 4.37      
2 A' 2997 2954 0.01      
3 A' 2851 2810 110.16      
4 A' 1762 1737 117.52      
5 A' 1749 1724 51.45      
6 A' 1435 1414 15.04      
7 A' 1359 1340 43.98      
8 A' 1324 1305 1.51      
9 A' 1213 1196 24.19      
10 A' 981 967 3.35      
11 A' 767 756 13.61      
12 A' 550 542 10.69      
13 A' 462 455 20.68      
14 A' 238 234 15.38      
15 A" 3060 3016 1.43      
16 A" 1438 1418 11.33      
17 A" 1037 1023 3.83      
18 A" 869 857 0.80      
19 A" 447 441 0.04      
20 A" 123 122 11.34      
21 A" 54 53 5.46      

Unscaled Zero Point Vibrational Energy (zpe) 13917.7 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 13718.7 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 PBEPBE/6-31G*
ABC
0.29971 0.14525 0.09965

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.840 -0.734 0.000
C2 0.000 0.560 0.000
C3 1.499 0.394 0.000
O4 -0.355 -1.852 0.000
O5 -0.598 1.630 0.000
H6 -1.945 -0.536 0.000
H7 1.991 1.377 0.000
H8 1.814 -0.192 0.882
H9 1.814 -0.192 -0.882

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54252.59731.21932.37621.12213.53142.84892.8489
C21.54251.50812.43811.22602.23272.15192.15212.1521
C32.59731.50812.91322.43383.56781.09881.10441.1044
O41.21932.43812.91323.49092.06383.99172.87052.8705
O52.37621.22602.43383.49092.55132.60073.14823.1482
H61.12212.23273.56782.06382.55134.37633.87633.8763
H73.53142.15191.09883.99172.60074.37631.80821.8082
H82.84892.15211.10442.87053.14823.87631.80821.7631
H92.84892.15211.10442.87053.14823.87631.80821.7631

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 116.725 C1 C2 O5 117.802
C2 C1 O4 123.537 C2 C1 H6 112.891
C2 C3 H7 110.282 C2 C3 H8 109.962
C2 C3 H9 109.962 C3 C2 O5 125.473
O4 C1 H6 123.572 H7 C3 H8 110.315
H7 C3 H9 110.315 H8 C3 H9 105.919
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.154      
2 C 0.375      
3 C -0.571      
4 O -0.323      
5 O -0.378      
6 H 0.139      
7 H 0.197      
8 H 0.204      
9 H 0.204      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.019 -0.040 0.000 1.020
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.039 1.868 0.000
y 1.868 -36.559 0.000
z 0.000 0.000 -27.050
Traceless
 xyz
x 5.766 1.868 0.000
y 1.868 -10.015 0.000
z 0.000 0.000 4.248
Polar
3z2-r28.497
x2-y210.520
xy1.868
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.093 -0.336 0.000
y -0.336 6.540 0.000
z 0.000 0.000 3.335


<r2> (average value of r2) Å2
<r2> 113.143
(<r2>)1/2 10.637