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

using model chemistry: mPW1PW91/STO-3G

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/STO-3G
 hartrees
Energy at 0K-263.580370
Energy at 298.15K-263.584012
HF Energy-263.580370
Nuclear repulsion energy155.628622
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/STO-3G
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' 3546 3116 0.92      
2 A' 3352 2946 2.45      
3 A' 3238 2846 29.12      
4 A' 1856 1631 10.95      
5 A' 1840 1617 12.83      
6 A' 1661 1460 8.08      
7 A' 1542 1355 10.41      
8 A' 1432 1258 17.23      
9 A' 1274 1120 36.11      
10 A' 1072 942 4.02      
11 A' 801 704 5.97      
12 A' 579 509 5.05      
13 A' 461 406 12.00      
14 A' 220 193 6.04      
15 A" 3517 3091 0.71      
16 A" 1661 1460 6.34      
17 A" 1111 977 6.14      
18 A" 907 797 0.47      
19 A" 458 403 0.15      
20 A" 132 116 5.76      
21 A" 37 32 1.51      

Unscaled Zero Point Vibrational Energy (zpe) 15348.0 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 13489.3 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/STO-3G
ABC
0.29255 0.13863 0.09576

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.880 -0.723 0.000
C2 0.000 0.577 0.000
C3 1.528 0.332 0.000
O4 -0.412 -1.880 0.000
O5 -0.538 1.705 0.000
H6 -1.982 -0.502 0.000
H7 2.068 1.287 0.000
H8 1.812 -0.250 0.888
H9 1.812 -0.250 -0.888

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.56992.62951.24752.45291.12363.56842.87372.8737
C21.56991.54782.49081.25032.25622.18682.18032.1803
C32.62951.54782.94242.48093.60771.09671.09891.0989
O41.24752.49082.94243.58752.08854.02232.89672.8967
O52.45291.25032.48093.58752.63772.63953.18293.1829
H61.12362.25623.60772.08852.63774.42733.90393.9039
H73.56842.18681.09674.02232.63954.42731.79311.7931
H82.87372.18031.09892.89673.18293.90391.79311.7764
H92.87372.18031.09892.89673.18293.90391.79311.7764

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 115.003 C1 C2 O5 120.433
C2 C1 O4 123.872 C2 C1 H6 112.729
C2 C3 H7 110.404 C2 C3 H8 109.765
C2 C3 H9 109.765 C3 C2 O5 124.564
O4 C1 H6 123.399 H7 C3 H8 109.507
H7 C3 H9 109.507 H8 C3 H9 107.849
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.066      
2 C 0.141      
3 C -0.255      
4 O -0.154      
5 O -0.164      
6 H 0.075      
7 H 0.095      
8 H 0.097      
9 H 0.097      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.482 -0.049 0.000 0.485
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.612 1.144 0.000
y 1.144 -32.280 0.000
z 0.000 0.000 -25.032
Traceless
 xyz
x 4.044 1.144 0.000
y 1.144 -7.458 0.000
z 0.000 0.000 3.415
Polar
3z2-r26.830
x2-y27.668
xy1.144
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.084 -0.299 0.000
y -0.299 4.084 0.000
z 0.000 0.000 1.481


<r2> (average value of r2) Å2
<r2> 115.104
(<r2>)1/2 10.729