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

using model chemistry: B3LYP/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/CEP-121G*
 hartrees
Energy at 0K-51.299136
Energy at 298.15K-51.303080
HF Energy-51.299136
Nuclear repulsion energy85.133289
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 B3LYP/CEP-121G*
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' 3147 3050 10.50      
2 A' 3033 2940 0.97      
3 A' 2940 2850 95.40      
4 A' 1771 1716 55.02      
5 A' 1759 1705 176.12      
6 A' 1469 1424 17.64      
7 A' 1398 1356 31.26      
8 A' 1351 1310 3.70      
9 A' 1230 1192 25.58      
10 A' 1002 972 2.50      
11 A' 763 739 12.81      
12 A' 558 541 13.79      
13 A' 470 456 24.06      
14 A' 238 231 15.73      
15 A" 3094 3000 7.92      
16 A" 1469 1424 10.90      
17 A" 1062 1030 2.31      
18 A" 898 871 0.02      
19 A" 458 444 0.37      
20 A" 124 120 16.79      
21 A" 65 63 5.98      

Unscaled Zero Point Vibrational Energy (zpe) 14149.9 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 13716.9 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 B3LYP/CEP-121G*
ABC
0.29741 0.14431 0.09894

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.846 -0.745 0.000
C2 0.000 0.560 0.000
C3 1.511 0.413 0.000
O4 -0.357 -1.858 0.000
O5 -0.604 1.622 0.000
H6 -1.943 -0.560 0.000
H7 1.977 1.402 0.000
H8 1.833 -0.160 0.879
H9 1.833 -0.160 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.55552.62721.21602.38011.11223.54752.87982.8798
C21.55551.51842.44431.22252.24292.14922.15612.1561
C32.62721.51842.94152.43663.58931.09291.09761.0976
O41.21602.44432.94153.48962.04984.00992.90732.9073
O52.38011.22252.43663.48962.56072.59073.14433.1443
H61.11222.24293.58932.04982.56074.38423.89743.8974
H73.54752.14921.09294.00992.59074.38421.79821.7982
H82.87982.15611.09762.90733.14433.89741.79821.7585
H92.87982.15611.09762.90733.14433.89741.79821.7585

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 117.447 C1 C2 O5 117.412
C2 C1 O4 123.289 C2 C1 H6 113.396
C2 C3 H7 109.704 C2 C3 H8 109.968
C2 C3 H9 109.968 C3 C2 O5 125.141
O4 C1 H6 123.315 H7 C3 H8 110.347
H7 C3 H9 110.347 H8 C3 H9 106.460
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.022      
2 C 0.290      
3 C -0.606      
4 O -0.213      
5 O -0.227      
6 H 0.139      
7 H 0.202      
8 H 0.196      
9 H 0.196      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.989 -0.031 0.000 0.989
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.159 2.251 0.000
y 2.251 -38.047 0.000
z 0.000 0.000 -27.420
Traceless
 xyz
x 6.574 2.251 0.000
y 2.251 -11.257 0.000
z 0.000 0.000 4.683
Polar
3z2-r29.365
x2-y211.887
xy2.251
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.461 -0.418 0.000
y -0.418 6.933 0.000
z 0.000 0.000 3.839


<r2> (average value of r2) Å2
<r2> 92.987
(<r2>)1/2 9.643