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

using model chemistry: HF/STO-3G

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/STO-3G
 hartrees
Energy at 0K-262.173153
Energy at 298.15K-262.177196
HF Energy-262.173153
Nuclear repulsion energy158.158186
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/STO-3G
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' 3765 3074 0.62      
2 A' 3569 2915 0.62      
3 A' 3556 2904 17.36      
4 A' 2111 1724 6.01      
5 A' 2073 1692 21.67      
6 A' 1801 1471 4.81      
7 A' 1702 1390 2.97      
8 A' 1559 1273 27.64      
9 A' 1423 1162 37.76      
10 A' 1190 972 4.35      
11 A' 891 727 3.88      
12 A' 643 525 6.76      
13 A' 512 418 20.11      
14 A' 244 199 7.03      
15 A" 3745 3058 0.30      
16 A" 1800 1470 3.96      
17 A" 1233 1007 3.28      
18 A" 1020 833 0.30      
19 A" 516 421 0.28      
20 A" 142 116 6.66      
21 A" 95 78 3.53      

Unscaled Zero Point Vibrational Energy (zpe) 16795.8 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 13713.7 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/STO-3G
ABC
0.29884 0.14373 0.09883

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.880 -0.712 0.000
C2 0.000 0.563 0.000
C3 1.520 0.330 0.000
O4 -0.422 -1.841 0.000
O5 -0.521 1.667 0.000
H6 -1.964 -0.507 0.000
H7 2.043 1.281 0.000
H8 1.809 -0.239 0.880
H9 1.809 -0.239 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54922.61681.21842.40601.10323.53792.86812.8681
C21.54921.53802.44051.22062.23672.16562.16512.1651
C32.61681.53802.91272.43973.58351.08511.08651.0865
O41.21842.44052.91273.50922.03913.97742.88332.8833
O52.40601.22062.43973.50922.60962.59263.13543.1354
H61.10322.23673.58352.03912.60964.38803.88303.8830
H73.53792.16561.08513.97742.59264.38801.77161.7716
H82.86812.16511.08652.88333.13543.88301.77161.7592
H92.86812.16511.08652.88333.13543.88301.77161.7592

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 115.907 C1 C2 O5 120.136
C2 C1 O4 123.278 C2 C1 H6 113.914
C2 C3 H7 110.095 C2 C3 H8 109.972
C2 C3 H9 109.972 C3 C2 O5 123.957
O4 C1 H6 122.808 H7 C3 H8 109.332
H7 C3 H9 109.332 H8 C3 H9 108.102
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.115      
2 C 0.184      
3 C -0.206      
4 O -0.190      
5 O -0.204      
6 H 0.063      
7 H 0.079      
8 H 0.079      
9 H 0.079      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.428 -0.051 0.000 0.431
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.025 1.322 0.000
y 1.322 -33.476 0.000
z 0.000 0.000 -25.072
Traceless
 xyz
x 4.248 1.322 0.000
y 1.322 -8.428 0.000
z 0.000 0.000 4.179
Polar
3z2-r28.358
x2-y28.451
xy1.322
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.852 -0.449 0.000
y -0.449 4.000 0.000
z 0.000 0.000 1.437


<r2> (average value of r2) Å2
<r2> 112.573
(<r2>)1/2 10.610