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

using model chemistry: B1B95/6-31+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 B1B95/6-31+G**
 hartrees
Energy at 0K-267.057824
Energy at 298.15K 
HF Energy-267.057824
Nuclear repulsion energy160.195777
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 B1B95/6-31+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' 3211 3071 3.21      
2 A' 3082 2948 0.06      
3 A' 2996 2866 69.58      
4 A' 1849 1769 86.42      
5 A' 1837 1757 164.93      
6 A' 1452 1389 18.72      
7 A' 1394 1333 45.10      
8 A' 1357 1298 2.15      
9 A' 1265 1210 19.23      
10 A' 1001 957 5.43      
11 A' 800 765 11.62      
12 A' 572 547 11.07      
13 A' 478 457 27.85      
14 A' 218 209 16.63      
15 A" 3154 3018 0.99      
16 A" 1452 1389 12.75      
17 A" 1072 1026 3.67      
18 A" 899 860 0.29      
19 A" 462 442 0.24      
20 A" 121 115 23.34      
21 A" 128i 122i 2.60      

Unscaled Zero Point Vibrational Energy (zpe) 14271.1 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 13651.7 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 B1B95/6-31+G**
ABC
0.30530 0.14865 0.10183

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.835 -0.731 0.000
C2 0.000 0.551 0.000
C3 1.486 0.402 0.000
O4 -0.344 -1.831 0.000
O5 -0.598 1.605 0.000
H6 -1.927 -0.554 0.000
H7 1.959 1.381 0.000
H8 1.800 -0.175 0.874
H9 1.800 -0.175 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52992.58291.20502.34771.10593.50242.83122.8312
C21.52991.49352.40681.21162.22162.12732.12812.1281
C32.58291.49352.88712.40613.54461.08741.09271.0927
O41.20502.40682.88713.44532.03363.95242.84662.8466
O52.34771.21162.40613.44532.53572.56623.11093.1109
H61.10592.22163.54462.03362.53574.34123.84673.8467
H73.50242.12731.08743.95242.56624.34121.79141.7914
H82.83122.12811.09272.84663.11093.84671.79141.7474
H92.83122.12811.09272.84663.11093.84671.79141.7474

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 117.363 C1 C2 O5 117.347
C2 C1 O4 122.852 C2 C1 H6 113.921
C2 C3 H7 110.030 C2 C3 H8 109.772
C2 C3 H9 109.772 C3 C2 O5 125.290
O4 C1 H6 123.227 H7 C3 H8 110.509
H7 C3 H9 110.509 H8 C3 H9 106.179
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.175      
2 C 0.316      
3 C -0.516      
4 O -0.337      
5 O -0.382      
6 H 0.154      
7 H 0.195      
8 H 0.198      
9 H 0.198      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.045 -0.066 0.000 1.047
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.075 2.423 0.000
y 2.423 -38.591 0.000
z 0.000 0.000 -27.499
Traceless
 xyz
x 6.970 2.423 0.000
y 2.423 -11.804 0.000
z 0.000 0.000 4.834
Polar
3z2-r29.668
x2-y212.517
xy2.423
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.510 -0.542 0.000
y -0.542 7.285 0.000
z 0.000 0.000 3.949


<r2> (average value of r2) Å2
<r2> 111.684
(<r2>)1/2 10.568