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

using model chemistry: B3LYP/SDD

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/SDD
 hartrees
Energy at 0K-267.109857
Energy at 298.15K-267.113852
HF Energy-267.109857
Nuclear repulsion energy157.520637
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/SDD
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' 3190 3067 8.64      
2 A' 3056 2938 0.09      
3 A' 3029 2911 64.27      
4 A' 1694 1629 11.13      
5 A' 1681 1616 153.59      
6 A' 1483 1426 27.11      
7 A' 1429 1374 54.40      
8 A' 1369 1316 1.16      
9 A' 1260 1212 25.63      
10 A' 1023 983 4.04      
11 A' 790 759 12.79      
12 A' 577 554 10.92      
13 A' 479 461 25.67      
14 A' 248 238 18.70      
15 A" 3132 3011 7.54      
16 A" 1485 1428 19.87      
17 A" 1086 1044 9.41      
18 A" 919 883 0.10      
19 A" 480 461 0.00      
20 A" 140 135 24.62      
21 A" 43 41 4.57      

Unscaled Zero Point Vibrational Energy (zpe) 14295.5 cm-1
Scaled (by 0.9613) Zero Point Vibrational Energy (zpe) 13742.2 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 B3LYP/SDD
ABC
0.29708 0.14340 0.09847

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.840 -0.736 0.000
C2 0.000 0.550 0.000
C3 1.503 0.414 0.000
O4 -0.342 -1.873 0.000
O5 -0.617 1.636 0.000
H6 -1.931 -0.553 0.000
H7 1.970 1.401 0.000
H8 1.830 -0.157 0.878
H9 1.830 -0.157 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53612.60981.24152.38201.10603.53072.86992.8699
C21.53611.50872.44711.24882.22372.14622.14952.1495
C32.60981.50872.93832.44653.56711.09241.09771.0977
O41.24152.44712.93833.51952.06584.00852.90382.9038
O52.38201.24882.44653.51952.55262.59783.15833.1583
H61.10602.22373.56712.06582.55264.36323.88233.8823
H73.53072.14621.09244.00852.59784.36321.79471.7947
H82.86992.14951.09772.90383.15833.88231.79471.7564
H92.86992.14951.09772.90383.15833.88231.79471.7564

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 117.993 C1 C2 O5 117.220
C2 C1 O4 123.178 C2 C1 H6 113.636
C2 C3 H7 110.169 C2 C3 H8 110.120
C2 C3 H9 110.120 C3 C2 O5 124.787
O4 C1 H6 123.186 H7 C3 H8 110.052
H7 C3 H9 110.052 H8 C3 H9 106.258
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.090      
2 C 0.210      
3 C -0.668      
4 O -0.177      
5 O -0.205      
6 H 0.211      
7 H 0.241      
8 H 0.239      
9 H 0.239      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.054 -0.007 0.000 1.054
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.718 2.722 0.000
y 2.722 -39.897 0.000
z 0.000 0.000 -27.491
Traceless
 xyz
x 7.976 2.722 0.000
y 2.722 -13.293 0.000
z 0.000 0.000 5.317
Polar
3z2-r210.634
x2-y214.179
xy2.722
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.419 -0.658 0.000
y -0.658 6.605 0.000
z 0.000 0.000 3.196


<r2> (average value of r2) Å2
<r2> 114.882
(<r2>)1/2 10.718