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

using model chemistry: B97D3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B97D3/6-31+G**
 hartrees
Energy at 0K-267.006760
Energy at 298.15K-267.010653
HF Energy-267.006760
Nuclear repulsion energy158.512281
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 B97D3/6-31+G**
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' 3127 3073 6.62      
2 A' 3000 2948 0.33      
3 A' 2886 2836 100.62      
4 A' 1743 1713 142.88      
5 A' 1726 1696 88.23      
6 A' 1433 1408 16.01      
7 A' 1362 1339 40.63      
8 A' 1330 1307 1.86      
9 A' 1207 1186 23.12      
10 A' 987 970 2.46      
11 A' 760 747 15.15      
12 A' 551 541 14.00      
13 A' 469 461 20.17      
14 A' 246 242 15.65      
15 A" 3066 3013 2.81      
16 A" 1436 1412 11.32      
17 A" 1040 1022 3.30      
18 A" 872 857 0.15      
19 A" 448 440 0.16      
20 A" 103 101 11.46      
21 A" 70 69 11.69      

Unscaled Zero Point Vibrational Energy (zpe) 13929.8 cm-1
Scaled (by 0.9828) Zero Point Vibrational Energy (zpe) 13690.2 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 B97D3/6-31+G**
ABC
0.30004 0.14483 0.09947

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.837 -0.743 0.000
C2 0.000 0.557 0.000
C3 1.500 0.417 0.000
O4 -0.347 -1.858 0.000
O5 -0.609 1.620 0.000
H6 -1.937 -0.561 0.000
H7 1.971 1.404 0.000
H8 1.819 -0.163 0.878
H9 1.819 -0.163 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54702.60981.21782.37481.11493.53542.85772.8577
C21.54701.50672.44001.22522.23682.14522.14452.1445
C32.60981.50672.93032.42853.57381.09371.09941.0994
O41.21782.44002.93033.48822.05244.00162.88742.8874
O52.37481.22522.42853.48822.55362.58923.13803.1380
H61.11492.23683.57382.05242.55364.37443.87833.8783
H73.53542.14521.09374.00162.58924.37441.80241.8024
H82.85772.14451.09942.88743.13803.87831.80241.7562
H92.85772.14451.09942.88743.13803.87831.80241.7562

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 116.877 C1 C2 O5 118.196
C2 C1 O4 123.886 C2 C1 H6 112.948
C2 C3 H7 109.710 C2 C3 H8 110.021
C2 C3 H9 110.021 C3 C2 O5 124.927
O4 C1 H6 123.166 H7 C3 H8 110.305
H7 C3 H9 110.305 H8 C3 H9 106.433
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.127      
2 C 0.314      
3 C -0.491      
4 O -0.309      
5 O -0.357      
6 H 0.144      
7 H 0.189      
8 H 0.192      
9 H 0.192      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.118 -0.048 0.000 1.119
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.432 2.393 0.000
y 2.393 -38.673 0.000
z 0.000 0.000 -27.638
Traceless
 xyz
x 6.724 2.393 0.000
y 2.393 -11.638 0.000
z 0.000 0.000 4.914
Polar
3z2-r29.828
x2-y212.241
xy2.393
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.050 -0.475 0.000
y -0.475 7.731 0.000
z 0.000 0.000 4.111


<r2> (average value of r2) Å2
<r2> 113.932
(<r2>)1/2 10.674