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

using model chemistry: wB97X-D/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 wB97X-D/3-21G*
 hartrees
Energy at 0K-265.584067
Energy at 298.15K-265.588246
HF Energy-265.584067
Nuclear repulsion energy159.399528
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 wB97X-D/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' 3210 3043 2.70      
2 A' 3091 2930 0.21      
3 A' 3019 2862 79.33      
4 A' 1804 1710 33.59      
5 A' 1778 1685 80.37      
6 A' 1517 1438 17.40      
7 A' 1459 1383 59.57      
8 A' 1386 1314 2.93      
9 A' 1236 1171 32.23      
10 A' 1034 980 3.16      
11 A' 787 746 15.06      
12 A' 590 559 8.95      
13 A' 480 454 19.46      
14 A' 265 251 20.91      
15 A" 3152 2987 0.48      
16 A" 1539 1459 18.06      
17 A" 1135 1075 8.82      
18 A" 968 918 0.53      
19 A" 518 491 0.15      
20 A" 196 186 16.53      
21 A" 46 44 3.03      

Unscaled Zero Point Vibrational Energy (zpe) 14605.4 cm-1
Scaled (by 0.9478) Zero Point Vibrational Energy (zpe) 13843.0 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 wB97X-D/3-21G*
ABC
0.30366 0.14793 0.10133

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.848 -0.706 0.000
C2 0.000 0.571 0.000
C3 1.484 0.316 0.000
O4 -0.377 -1.830 0.000
O5 -0.551 1.663 0.000
H6 -1.926 -0.470 0.000
H7 2.016 1.268 0.000
H8 1.763 -0.272 0.880
H9 1.763 -0.272 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53282.54631.21892.38771.10333.47852.78952.7895
C21.53281.50552.43061.22372.18912.13332.14342.1434
C32.54631.50552.84132.44053.49931.09011.09521.0952
O41.21892.43062.84133.49792.06113.91502.79002.7900
O52.38771.22372.44053.49792.53772.59803.14293.1429
H61.10332.18913.49932.06112.53774.30823.79773.7977
H73.47852.13331.09013.91502.59804.30821.79181.7918
H82.78952.14341.09522.79003.14293.79771.79181.7607
H92.78952.14341.09522.79003.14293.79771.79181.7607

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 113.867 C1 C2 O5 119.622
C2 C1 O4 123.689 C2 C1 H6 111.242
C2 C3 H7 109.511 C2 C3 H8 110.002
C2 C3 H9 110.002 C3 C2 O5 126.511
O4 C1 H6 125.069 H7 C3 H8 110.152
H7 C3 H9 110.152 H8 C3 H9 106.991
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.203      
2 C 0.337      
3 C -0.691      
4 O -0.410      
5 O -0.430      
6 H 0.222      
7 H 0.253      
8 H 0.258      
9 H 0.258      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.817 -0.113 0.000 0.825
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.877 1.856 0.000
y 1.856 -37.626 0.000
z 0.000 0.000 -27.267
Traceless
 xyz
x 6.570 1.856 0.000
y 1.856 -11.054 0.000
z 0.000 0.000 4.484
Polar
3z2-r28.968
x2-y211.749
xy1.856
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.062 -0.506 0.000
y -0.506 5.732 0.000
z 0.000 0.000 2.777


<r2> (average value of r2) Å2
<r2> 111.656
(<r2>)1/2 10.567