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

using model chemistry: B3LYP/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-51.208944
Energy at 298.15K-51.212967
HF Energy-51.208944
Nuclear repulsion energy84.378614
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/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3140 3060 10.38      
2 A' 3009 2932 0.70      
3 A' 2988 2912 67.89      
4 A' 1666 1624 9.99      
5 A' 1652 1610 153.95      
6 A' 1481 1443 26.61      
7 A' 1425 1389 39.71      
8 A' 1350 1316 2.30      
9 A' 1252 1220 24.78      
10 A' 1022 996 2.64      
11 A' 778 758 12.20      
12 A' 570 555 11.78      
13 A' 473 461 25.86      
14 A' 242 236 18.16      
15 A" 3084 3006 8.88      
16 A" 1481 1443 15.42      
17 A" 1075 1048 4.92      
18 A" 915 892 0.21      
19 A" 471 459 0.02      
20 A" 137 133 22.14      
21 A" 58 57 5.97      

Unscaled Zero Point Vibrational Energy (zpe) 14134.5 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 13774.0 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 B3LYP/CEP-121G
ABC
0.29396 0.14203 0.09749

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.848 -0.740 0.000
C2 0.000 0.550 0.000
C3 1.511 0.418 0.000
O4 -0.342 -1.882 0.000
O5 -0.620 1.643 0.000
H6 -1.940 -0.569 0.000
H7 1.969 1.410 0.000
H8 1.842 -0.150 0.879
H9 1.842 -0.150 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54432.62861.24842.39471.10543.54422.89132.8913
C21.54431.51722.45571.25682.23962.14882.15822.1582
C32.62861.51722.95342.45873.58981.09231.09791.0979
O41.24842.45572.95343.53592.06844.02172.92242.9224
O52.39471.25682.45873.53592.57602.60003.17093.1709
H61.10542.23963.58982.06842.57604.38163.90583.9058
H73.54422.14881.09234.02172.60004.38161.79521.7952
H82.89132.15821.09792.92243.17093.90581.79521.7580
H92.89132.15821.09792.92243.17093.90581.79521.7580

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 118.311 C1 C2 O5 117.127
C2 C1 O4 122.765 C2 C1 H6 114.372
C2 C3 H7 109.790 C2 C3 H8 110.209
C2 C3 H9 110.209 C3 C2 O5 124.562
O4 C1 H6 122.864 H7 C3 H8 110.100
H7 C3 H9 110.100 H8 C3 H9 106.382
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.057      
2 C 0.143      
3 C -0.571      
4 O -0.109      
5 O -0.113      
6 H 0.135      
7 H 0.192      
8 H 0.190      
9 H 0.190      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.073 -0.045 0.000 1.074
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.060 2.799 0.000
y 2.799 -40.145 0.000
z 0.000 0.000 -27.693
Traceless
 xyz
x 7.859 2.799 0.000
y 2.799 -13.269 0.000
z 0.000 0.000 5.410
Polar
3z2-r210.820
x2-y214.085
xy2.799
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.114 -0.663 0.000
y -0.663 7.088 0.000
z 0.000 0.000 3.647


<r2> (average value of r2) Å2
<r2> 94.454
(<r2>)1/2 9.719