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

using model chemistry: HF/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 HF/6-31G
 hartrees
Energy at 0K-265.511058
Energy at 298.15K-265.515451
HF Energy-265.511058
Nuclear repulsion energy160.735926
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/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' 3326 3003 4.98      
2 A' 3276 2958 35.89      
3 A' 3211 2900 0.96      
4 A' 1946 1757 9.32      
5 A' 1904 1720 221.68      
6 A' 1617 1460 19.63      
7 A' 1579 1426 31.88      
8 A' 1490 1346 8.57      
9 A' 1390 1255 26.23      
10 A' 1141 1031 5.34      
11 A' 860 777 11.23      
12 A' 642 580 14.78      
13 A' 534 482 39.53      
14 A' 279 252 23.53      
15 A" 3279 2960 4.47      
16 A" 1624 1466 14.91      
17 A" 1204 1087 6.17      
18 A" 1033 933 0.00      
19 A" 529 478 1.13      
20 A" 155 140 32.52      
21 A" 99 89 6.34      

Unscaled Zero Point Vibrational Energy (zpe) 15560.1 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 14049.2 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/6-31G
ABC
0.30594 0.15036 0.10269

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.841 -0.715 0.000
C2 0.000 0.535 0.000
C3 1.487 0.395 0.000
O4 -0.353 -1.822 0.000
O5 -0.589 1.598 0.000
H6 -1.910 -0.550 0.000
H7 1.943 1.373 0.000
H8 1.815 -0.160 0.871
H9 1.815 -0.160 -0.871

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.50662.57931.21002.32711.08153.48012.84982.8498
C21.50661.49362.38301.21602.19672.11602.12952.1295
C32.57931.49362.88062.40013.52611.07901.08331.0833
O41.21002.38302.88063.42852.01083.93392.86662.8666
O52.32711.21602.40013.42852.52192.54253.10353.1035
H61.08152.19673.52612.01082.52194.30623.84523.8452
H73.48012.11601.07903.93392.54254.30621.76761.7676
H82.84982.12951.08332.86663.10353.84521.76761.7413
H92.84982.12951.08332.86663.10353.84521.76761.7413

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 118.565 C1 C2 O5 117.060
C2 C1 O4 122.235 C2 C1 H6 115.172
C2 C3 H7 109.619 C2 C3 H8 110.448
C2 C3 H9 110.448 C3 C2 O5 124.376
O4 C1 H6 122.593 H7 C3 H8 109.658
H7 C3 H9 109.658 H8 C3 H9 106.971
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.256      
2 C 0.383      
3 C -0.519      
4 O -0.463      
5 O -0.497      
6 H 0.215      
7 H 0.211      
8 H 0.207      
9 H 0.207      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.922 -0.022 0.000 0.923
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.768 2.876 0.000
y 2.876 -41.176 0.000
z 0.000 0.000 -27.627
Traceless
 xyz
x 8.633 2.876 0.000
y 2.876 -14.478 0.000
z 0.000 0.000 5.845
Polar
3z2-r211.690
x2-y215.408
xy2.876
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.876 -0.843 0.000
y -0.843 6.257 0.000
z 0.000 0.000 2.959


<r2> (average value of r2) Å2
<r2> 111.457
(<r2>)1/2 10.557