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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-267.042761
Energy at 298.15K-267.046771
HF Energy-267.042761
Nuclear repulsion energy159.683649
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 B3PW91/6-31G*
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' 3194 3055 4.34      
2 A' 3072 2939 0.01      
3 A' 2970 2842 91.42      
4 A' 1840 1761 74.62      
5 A' 1831 1751 122.08      
6 A' 1479 1415 15.32      
7 A' 1412 1351 42.72      
8 A' 1370 1310 2.72      
9 A' 1261 1207 24.18      
10 A' 1018 974 4.17      
11 A' 793 759 12.75      
12 A' 573 548 11.70      
13 A' 480 459 24.79      
14 A' 244 234 16.77      
15 A" 3139 3003 1.78      
16 A" 1485 1420 11.58      
17 A" 1079 1032 4.01      
18 A" 908 869 0.80      
19 A" 466 446 0.25      
20 A" 132 126 14.84      
21 A" 72 69 5.73      

Unscaled Zero Point Vibrational Energy (zpe) 14408.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13784.4 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 B3PW91/6-31G*
ABC
0.30327 0.14757 0.10111

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.730 0.000
C2 0.000 0.554 0.000
C3 1.493 0.394 0.000
O4 -0.356 -1.836 0.000
O5 -0.592 1.614 0.000
H6 -1.933 -0.540 0.000
H7 1.974 1.373 0.000
H8 1.808 -0.183 0.877
H9 1.808 -0.183 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53342.58791.20762.35641.11033.51192.84112.8411
C21.53341.50142.41721.21382.22082.13752.14052.1405
C32.58791.50142.89712.41563.55041.09121.09611.0961
O41.20762.41722.89713.45852.04133.96642.86102.8610
O52.35641.21382.41563.45852.53692.57773.12403.1240
H61.11032.22083.55042.04132.53694.35013.85853.8585
H73.51192.13751.09123.96642.57774.35011.79411.7941
H82.84112.14051.09612.86103.12403.85851.79411.7539
H92.84112.14051.09612.86103.12403.85851.79411.7539

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 117.020 C1 C2 O5 117.656
C2 C1 O4 123.295 C2 C1 H6 113.315
C2 C3 H7 110.060 C2 C3 H8 110.008
C2 C3 H9 110.008 C3 C2 O5 125.324
O4 C1 H6 123.390 H7 C3 H8 110.217
H7 C3 H9 110.217 H8 C3 H9 106.266
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.169      
2 C 0.394      
3 C -0.599      
4 O -0.355      
5 O -0.410      
6 H 0.163      
7 H 0.210      
8 H 0.214      
9 H 0.214      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.967 -0.037 0.000 0.967
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.727 2.018 0.000
y 2.018 -36.980 0.000
z 0.000 0.000 -26.916
Traceless
 xyz
x 6.221 2.018 0.000
y 2.018 -10.659 0.000
z 0.000 0.000 4.438
Polar
3z2-r28.876
x2-y211.253
xy2.018
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.753 -0.400 0.000
y -0.400 6.318 0.000
z 0.000 0.000 3.284


<r2> (average value of r2) Å2
<r2> 111.808
(<r2>)1/2 10.574