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

using model chemistry: B3LYP/3-21G*

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/3-21G*
 hartrees
Energy at 0K-265.667589
Energy at 298.15K 
HF Energy-265.667589
Nuclear repulsion energy158.950859
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/3-21G*
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' 3174 3054 4.77      
2 A' 3066 2949 0.03      
3 A' 2966 2853 93.00      
4 A' 1748 1682 36.58      
5 A' 1730 1664 66.01      
6 A' 1513 1456 16.97      
7 A' 1444 1389 47.18      
8 A' 1375 1323 2.98      
9 A' 1213 1167 31.56      
10 A' 1017 978 1.96      
11 A' 771 742 15.49      
12 A' 579 557 8.30      
13 A' 469 451 19.03      
14 A' 258 248 19.48      
15 A" 3115 2997 1.74      
16 A" 1533 1475 14.45      
17 A" 1124 1081 6.12      
18 A" 961 924 0.51      
19 A" 511 491 0.07      
20 A" 198 191 14.05      
21 A" 47i 46i 2.94      

Unscaled Zero Point Vibrational Energy (zpe) 14358.7 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 13813.1 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/3-21G*
ABC
0.30212 0.14699 0.10072

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.849 -0.703 0.000
C2 0.000 0.568 0.000
C3 1.486 0.321 0.000
O4 -0.365 -1.832 0.000
O5 -0.566 1.663 0.000
H6 -1.930 -0.479 0.000
H7 2.031 1.266 0.000
H8 1.761 -0.273 0.879
H9 1.761 -0.273 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52792.54951.22862.38271.10413.48792.78722.7872
C21.52791.50682.42771.23302.19532.14732.14072.1407
C32.54951.50682.83992.45253.50851.09051.09621.0962
O41.22862.42772.83993.50122.06873.91662.77942.7794
O52.38271.23302.45253.50122.53922.62713.15283.1528
H61.10412.19533.50852.06872.53924.32773.79983.7998
H73.48792.14731.09053.91662.62714.32771.79301.7930
H82.78722.14071.09622.77943.15283.79981.79301.7582
H92.78722.14071.09622.77943.15283.79981.79301.7582

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 114.309 C1 C2 O5 118.927
C2 C1 O4 123.095 C2 C1 H6 112.040
C2 C3 H7 110.510 C2 C3 H8 109.643
C2 C3 H9 109.643 C3 C2 O5 126.764
O4 C1 H6 124.865 H7 C3 H8 110.166
H7 C3 H9 110.166 H8 C3 H9 106.634
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.214      
2 C 0.334      
3 C -0.626      
4 O -0.397      
5 O -0.417      
6 H 0.193      
7 H 0.228      
8 H 0.235      
9 H 0.235      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.838 -0.098 0.000 0.844
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.266 1.730 0.000
y 1.730 -37.340 0.000
z 0.000 0.000 -27.322
Traceless
 xyz
x 6.065 1.730 0.000
y 1.730 -10.546 0.000
z 0.000 0.000 4.482
Polar
3z2-r28.963
x2-y211.074
xy1.730
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.193 -0.463 0.000
y -0.463 5.835 0.000
z 0.000 0.000 2.786


<r2> (average value of r2) Å2
<r2> 112.220
(<r2>)1/2 10.593