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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-266.841421
Energy at 298.15K-266.845310
HF Energy-266.841421
Nuclear repulsion energy158.481064
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 PBEPBEultrafine/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' 3120 3068 4.37      
2 A' 2996 2946 0.01      
3 A' 2852 2805 110.27      
4 A' 1762 1733 118.01      
5 A' 1749 1720 50.95      
6 A' 1435 1411 15.07      
7 A' 1359 1336 44.08      
8 A' 1325 1303 1.49      
9 A' 1212 1192 24.07      
10 A' 980 964 3.33      
11 A' 767 755 13.62      
12 A' 550 540 10.58      
13 A' 462 454 20.84      
14 A' 238 234 15.33      
15 A" 3059 3009 1.43      
16 A" 1439 1415 11.32      
17 A" 1037 1020 3.81      
18 A" 869 855 0.80      
19 A" 447 439 0.04      
20 A" 125 123 10.57      
21 A" 68 67 6.23      

Unscaled Zero Point Vibrational Energy (zpe) 13923.9 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 13694.1 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 PBEPBEultrafine/6-31G*
ABC
0.29970 0.14524 0.09964

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.840 -0.734 0.000
C2 0.000 0.560 0.000
C3 1.499 0.395 0.000
O4 -0.355 -1.853 0.000
O5 -0.598 1.630 0.000
H6 -1.945 -0.537 0.000
H7 1.990 1.378 0.000
H8 1.814 -0.192 0.882
H9 1.814 -0.192 -0.882

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54262.59751.21932.37621.12223.53152.84882.8488
C21.54261.50822.43821.22602.23272.15192.15202.1520
C32.59751.50822.91352.43383.56791.09881.10441.1044
O41.21932.43822.91353.49092.06383.99192.87072.8707
O52.37621.22602.43383.49092.55122.60063.14823.1482
H61.12222.23273.56792.06382.55124.37633.87623.8762
H73.53152.15191.09883.99192.60064.37631.80841.8084
H82.84882.15201.10442.87073.14823.87621.80841.7631
H92.84882.15201.10442.87073.14823.87621.80841.7631

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 116.729 C1 C2 O5 117.799
C2 C1 O4 123.544 C2 C1 H6 112.886
C2 C3 H7 110.279 C2 C3 H8 109.955
C2 C3 H9 109.955 C3 C2 O5 125.472
O4 C1 H6 123.570 H7 C3 H8 110.325
H7 C3 H9 110.325 H8 C3 H9 105.916
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.154      
2 C 0.375      
3 C -0.571      
4 O -0.323      
5 O -0.378      
6 H 0.139      
7 H 0.197      
8 H 0.204      
9 H 0.204      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.019 -0.040 0.000 1.020
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.040 1.869 0.000
y 1.869 -36.558 0.000
z 0.000 0.000 -27.051
Traceless
 xyz
x 5.764 1.869 0.000
y 1.869 -10.013 0.000
z 0.000 0.000 4.249
Polar
3z2-r28.498
x2-y210.518
xy1.869
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.093 -0.336 0.000
y -0.336 6.540 0.000
z 0.000 0.000 3.334


<r2> (average value of r2) Å2
<r2> 113.148
(<r2>)1/2 10.637