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

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-267.076372
Energy at 298.15K-267.080405
HF Energy-267.076372
Nuclear repulsion energy160.039148
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 mPW1PW91/6-31G*
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' 3214 3048 3.88      
2 A' 3090 2931 0.01      
3 A' 2999 2844 85.67      
4 A' 1861 1765 53.95      
5 A' 1852 1756 148.59      
6 A' 1487 1410 15.47      
7 A' 1422 1348 43.58      
8 A' 1378 1307 2.92      
9 A' 1274 1208 23.32      
10 A' 1025 972 4.58      
11 A' 802 761 12.32      
12 A' 578 548 11.45      
13 A' 483 458 25.83      
14 A' 246 233 17.12      
15 A" 3160 2996 1.50      
16 A" 1492 1415 11.83      
17 A" 1087 1030 4.05      
18 A" 915 868 0.83      
19 A" 469 445 0.29      
20 A" 134 127 15.69      
21 A" 71 67 5.57      

Unscaled Zero Point Vibrational Energy (zpe) 14519.3 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 13768.6 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 mPW1PW91/6-31G*
ABC
0.30442 0.14839 0.10162

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.726 0.000
C2 0.000 0.553 0.000
C3 1.490 0.389 0.000
O4 -0.356 -1.830 0.000
O5 -0.588 1.612 0.000
H6 -1.930 -0.538 0.000
H7 1.973 1.366 0.000
H8 1.802 -0.188 0.876
H9 1.802 -0.188 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53002.58191.20502.35151.10793.50452.83402.8340
C21.53001.49882.41011.21112.21752.13362.13662.1366
C32.58191.49882.88662.41133.54361.08961.09451.0945
O41.20502.41012.88663.45012.03723.95452.84992.8499
O52.35151.21112.41133.45012.53422.57313.11813.1181
H61.10792.21753.54362.03722.53424.34283.85013.8501
H73.50452.13361.08963.95452.57314.34281.79181.7918
H82.83402.13661.09452.84993.11813.85011.79181.7516
H92.83402.13661.09452.84993.11813.85011.79181.7516

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 116.950 C1 C2 O5 117.689
C2 C1 O4 123.137 C2 C1 H6 113.446
C2 C3 H7 110.030 C2 C3 H8 109.977
C2 C3 H9 109.977 C3 C2 O5 125.361
O4 C1 H6 123.417 H7 C3 H8 110.248
H7 C3 H9 110.248 H8 C3 H9 106.299
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.171      
2 C 0.394      
3 C -0.607      
4 O -0.360      
5 O -0.414      
6 H 0.169      
7 H 0.214      
8 H 0.217      
9 H 0.217      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.947 -0.044 0.000 0.948
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.685 2.020 0.000
y 2.020 -37.027 0.000
z 0.000 0.000 -26.912
Traceless
 xyz
x 6.284 2.020 0.000
y 2.020 -10.728 0.000
z 0.000 0.000 4.444
Polar
3z2-r28.888
x2-y211.341
xy2.020
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.677 -0.414 0.000
y -0.414 6.269 0.000
z 0.000 0.000 3.267


<r2> (average value of r2) Å2
<r2> 111.353
(<r2>)1/2 10.552