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

using model chemistry: PBE1PBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBE1PBE/6-311G*
 hartrees
Energy at 0K-266.912493
Energy at 298.15K-266.916545
HF Energy-266.912493
Nuclear repulsion energy160.366756
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 PBE1PBE/6-311G*
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' 3188 3055 6.16      
2 A' 3070 2942 0.14      
3 A' 2961 2838 98.06      
4 A' 1852 1775 89.55      
5 A' 1840 1764 142.92      
6 A' 1471 1409 19.02      
7 A' 1405 1346 49.91      
8 A' 1365 1308 2.19      
9 A' 1262 1210 19.52      
10 A' 1016 974 4.09      
11 A' 799 766 12.80      
12 A' 578 554 11.97      
13 A' 485 465 25.79      
14 A' 246 236 16.42      
15 A" 3135 3005 3.14      
16 A" 1472 1411 13.50      
17 A" 1083 1038 3.71      
18 A" 908 870 0.73      
19 A" 473 453 0.13      
20 A" 134 129 15.62      
21 A" 73 70 5.72      

Unscaled Zero Point Vibrational Energy (zpe) 14406.9 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 13809.0 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 PBE1PBE/6-311G*
ABC
0.30583 0.14870 0.10192

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.835 -0.729 0.000
C2 0.000 0.555 0.000
C3 1.487 0.393 0.000
O4 -0.357 -1.828 0.000
O5 -0.588 1.607 0.000
H6 -1.929 -0.542 0.000
H7 1.970 1.369 0.000
H8 1.803 -0.184 0.874
H9 1.803 -0.184 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53142.57881.19872.34881.10973.50252.83242.8324
C21.53141.49572.40911.20532.21872.13132.13592.1359
C32.57881.49572.88622.40403.54141.08901.09391.0939
O41.19872.40912.88623.44252.03143.95362.85152.8515
O52.34881.20532.40403.44252.53262.56863.11293.1129
H61.10972.21873.54142.03142.53264.34153.84993.8499
H73.50252.13131.08903.95362.56864.34151.78981.7898
H82.83242.13591.09392.85153.11293.84991.78981.7476
H92.83242.13591.09392.85153.11293.84991.78981.7476

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 116.835 C1 C2 O5 117.750
C2 C1 O4 123.419 C2 C1 H6 113.335
C2 C3 H7 110.094 C2 C3 H8 110.167
C2 C3 H9 110.167 C3 C2 O5 125.415
O4 C1 H6 123.246 H7 C3 H8 110.158
H7 C3 H9 110.158 H8 C3 H9 106.026
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.042      
2 C 0.239      
3 C -0.737      
4 O -0.254      
5 O -0.272      
6 H 0.202      
7 H 0.259      
8 H 0.261      
9 H 0.261      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.942 -0.058 0.000 0.944
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.166 2.056 0.000
y 2.056 -37.468 0.000
z 0.000 0.000 -27.306
Traceless
 xyz
x 6.220 2.056 0.000
y 2.056 -10.732 0.000
z 0.000 0.000 4.512
Polar
3z2-r29.023
x2-y211.302
xy2.056
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.074 -0.404 0.000
y -0.404 6.439 0.000
z 0.000 0.000 3.497


<r2> (average value of r2) Å2
<r2> 111.379
(<r2>)1/2 10.554