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

using model chemistry: BLYP/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 BLYP/STO-3G
 hartrees
Energy at 0K-263.511637
Energy at 298.15K 
HF Energy-263.511637
Nuclear repulsion energy152.685035
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 BLYP/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' 3385 3132 0.53      
2 A' 3201 2961 1.28      
3 A' 3011 2786 57.12      
4 A' 1710 1582 12.40      
5 A' 1699 1572 12.16      
6 A' 1605 1485 8.31      
7 A' 1474 1363 6.97      
8 A' 1363 1261 17.64      
9 A' 1167 1080 39.61      
10 A' 992 917 3.54      
11 A' 717 663 8.02      
12 A' 529 490 5.56      
13 A' 424 392 8.50      
14 A' 202 187 4.94      
15 A" 3355 3104 0.02      
16 A" 1607 1487 5.09      
17 A" 1047 968 4.98      
18 A" 830 768 0.98      
19 A" 415 384 0.50      
20 A" 118 109 4.08      
21 A" 25i 23i 1.11      

Unscaled Zero Point Vibrational Energy (zpe) 14412.2 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 13334.2 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 BLYP/STO-3G
ABC
0.28220 0.13259 0.09180

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.894 -0.746 0.000
C2 0.000 0.594 0.000
C3 1.559 0.345 0.000
O4 -0.422 -1.923 0.000
O5 -0.550 1.739 0.000
H6 -2.011 -0.515 0.000
H7 2.104 1.309 0.000
H8 1.844 -0.243 0.898
H9 1.844 -0.243 -0.898

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.61152.68561.26772.50961.13993.63592.92562.9256
C21.61151.57902.55171.27052.29592.22262.21522.2152
C32.68561.57903.01102.52833.67191.10771.11021.1102
O41.26772.55173.01103.66432.12314.10202.95982.9598
O52.50961.27052.52833.66432.68592.68883.23523.2352
H61.13992.29593.67192.12312.68594.50113.96723.9672
H73.63592.22261.10774.10202.68884.50111.81191.8119
H82.92562.21521.11022.95983.23523.96721.81191.7952
H92.92562.21521.11022.95983.23523.96721.81191.7952

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 114.647 C1 C2 O5 120.643
C2 C1 O4 124.380 C2 C1 H6 111.980
C2 C3 H7 110.407 C2 C3 H8 109.687
C2 C3 H9 109.687 C3 C2 O5 124.710
O4 C1 H6 123.640 H7 C3 H8 109.560
H7 C3 H9 109.560 H8 C3 H9 107.897
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.061      
2 C 0.127      
3 C -0.233      
4 O -0.137      
5 O -0.146      
6 H 0.064      
7 H 0.086      
8 H 0.089      
9 H 0.089      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.473 -0.037 0.000 0.475
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.739 1.059 0.000
y 1.059 -31.778 0.000
z 0.000 0.000 -25.131
Traceless
 xyz
x 3.715 1.059 0.000
y 1.059 -6.842 0.000
z 0.000 0.000 3.127
Polar
3z2-r26.254
x2-y27.038
xy1.059
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.432 -0.176 0.000
y -0.176 4.357 0.000
z 0.000 0.000 1.552


<r2> (average value of r2) Å2
<r2> 119.159
(<r2>)1/2 10.916