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

using model chemistry: HF/CEP-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 HF/CEP-31G*
 hartrees
Energy at 0K-50.167968
Energy at 298.15K-50.172261
HF Energy-50.167968
Nuclear repulsion energy85.988813
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 HF/CEP-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' 3352 3010 20.64      
2 A' 3247 2915 33.62      
3 A' 3244 2913 51.91      
4 A' 2034 1826 10.66      
5 A' 1993 1790 385.08      
6 A' 1589 1427 14.43      
7 A' 1546 1388 15.36      
8 A' 1468 1318 9.35      
9 A' 1372 1232 29.27      
10 A' 1107 994 4.68      
11 A' 845 759 8.83      
12 A' 617 554 15.12      
13 A' 514 461 39.37      
14 A' 259 233 19.65      
15 A" 3317 2978 21.35      
16 A" 1597 1434 9.64      
17 A" 1183 1062 2.27      
18 A" 1003 901 0.03      
19 A" 512 459 2.31      
20 A" 141 126 16.56      
21 A" 113 102 18.45      

Unscaled Zero Point Vibrational Energy (zpe) 15525.6 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 13942.0 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 HF/CEP-31G*
ABC
0.30058 0.14779 0.10092

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.851 -0.736 0.000
C2 0.000 0.555 0.000
C3 1.510 0.401 0.000
O4 -0.367 -1.830 0.000
O5 -0.588 1.603 0.000
H6 -1.934 -0.557 0.000
H7 1.973 1.385 0.000
H8 1.822 -0.165 0.878
H9 1.822 -0.165 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54612.62091.19642.35351.09783.53112.87082.8708
C21.54611.51832.41321.20162.23052.14002.14682.1468
C32.62091.51832.91622.41823.57501.08651.08991.0899
O41.19642.41322.91623.44012.01923.97602.88732.8873
O52.35351.20162.41823.44012.54422.57003.11523.1152
H61.09782.23053.57502.01922.54424.36213.87713.8771
H73.53112.14001.08653.97602.57004.36211.78711.7871
H82.87082.14681.08992.88733.11523.87711.78711.7555
H92.87082.14681.08992.88733.11523.87711.78711.7555

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 117.579 C1 C2 O5 117.305
C2 C1 O4 122.758 C2 C1 H6 113.975
C2 C3 H7 109.362 C2 C3 H8 109.697
C2 C3 H9 109.697 C3 C2 O5 125.116
O4 C1 H6 123.267 H7 C3 H8 110.388
H7 C3 H9 110.388 H8 C3 H9 107.283
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.067      
2 C 0.053      
3 C -0.288      
4 O -0.148      
5 O -0.158      
6 H 0.177      
7 H 0.166      
8 H 0.132      
9 H 0.132      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.831 0.020 0.000 0.831
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.678 2.498 0.000
y 2.498 -39.508 0.000
z 0.000 0.000 -27.184
Traceless
 xyz
x 7.668 2.498 0.000
y 2.498 -13.077 0.000
z 0.000 0.000 5.409
Polar
3z2-r210.818
x2-y213.830
xy2.498
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.185 -0.580 0.000
y -0.580 6.143 0.000
z 0.000 0.000 3.326


<r2> (average value of r2) Å2
<r2> 91.783
(<r2>)1/2 9.580