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

using model chemistry: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-266.860507
Energy at 298.15K-266.864347
HF Energy-266.860507
Nuclear repulsion energy158.871709
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 PBEPBE/6-31G(2df,p)
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' 3112 3080 4.01      
2 A' 2987 2956 0.01      
3 A' 2822 2793 104.11      
4 A' 1762 1744 125.61      
5 A' 1745 1727 44.92      
6 A' 1400 1385 13.70      
7 A' 1327 1313 41.41      
8 A' 1309 1296 0.90      
9 A' 1201 1189 21.29      
10 A' 968 958 3.46      
11 A' 763 755 14.05      
12 A' 548 542 9.97      
13 A' 457 453 21.23      
14 A' 233 231 14.74      
15 A" 3054 3022 0.83      
16 A" 1406 1391 9.12      
17 A" 1038 1027 2.74      
18 A" 861 852 1.01      
19 A" 449 444 0.08      
20 A" 125 124 10.45      
21 A" 42 41 5.43      

Unscaled Zero Point Vibrational Energy (zpe) 13803.6 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 13661.5 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 PBEPBE/6-31G(2df,p)
ABC
0.30088 0.14590 0.10007

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.733 0.000
C2 0.000 0.561 0.000
C3 1.498 0.391 0.000
O4 -0.359 -1.847 0.000
O5 -0.593 1.627 0.000
H6 -1.943 -0.527 0.000
H7 1.994 1.369 0.000
H8 1.806 -0.200 0.879
H9 1.806 -0.200 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54232.59321.21312.37261.12253.52822.83852.8385
C21.54231.50772.43441.21972.22672.15182.14822.1482
C32.59321.50772.90742.42913.56101.09741.10301.1030
O41.21312.43442.90743.48152.06183.98492.85902.8590
O52.37261.21972.42913.48152.54182.60003.14103.1410
H61.12252.22673.56102.06182.54184.36983.86473.8647
H73.52822.15181.09743.98492.60004.36981.80831.8083
H82.83852.14821.10302.85903.14103.86471.80831.7586
H92.83852.14821.10302.85903.14103.86471.80831.7586

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 116.475 C1 C2 O5 117.941
C2 C1 O4 123.699 C2 C1 H6 112.396
C2 C3 H7 110.393 C2 C3 H8 109.772
C2 C3 H9 109.772 C3 C2 O5 125.584
O4 C1 H6 123.905 H7 C3 H8 110.536
H7 C3 H9 110.536 H8 C3 H9 105.731
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.048      
2 C 0.290      
3 C -0.514      
4 O -0.186      
5 O -0.243      
6 H 0.106      
7 H 0.157      
8 H 0.171      
9 H 0.171      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.005 -0.041 0.000 1.006
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.056 1.837 0.000
y 1.837 -36.221 0.000
z 0.000 0.000 -26.951
Traceless
 xyz
x 5.529 1.837 0.000
y 1.837 -9.717 0.000
z 0.000 0.000 4.188
Polar
3z2-r28.376
x2-y210.164
xy1.837
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.460 -0.199 0.000
y -0.199 6.698 0.000
z 0.000 0.000 3.715


<r2> (average value of r2) Å2
<r2> 112.650
(<r2>)1/2 10.614