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

using model chemistry: LSDA/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at LSDA/6-31G(2df,p)
 hartrees
Energy at 0K-265.758544
Energy at 298.15K 
HF Energy-265.758544
Nuclear repulsion energy160.808572
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 LSDA/6-31G(2df,p)
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' 3124 3074 1.14      
2 A' 2987 2940 1.69      
3 A' 2825 2780 85.98      
4 A' 1817 1787 138.34      
5 A' 1798 1769 35.65      
6 A' 1366 1344 16.17      
7 A' 1320 1298 70.42      
8 A' 1293 1272 0.67      
9 A' 1224 1205 6.45      
10 A' 961 945 6.67      
11 A' 799 786 12.29      
12 A' 560 551 7.50      
13 A' 458 450 23.61      
14 A' 236 232 17.28      
15 A" 3059 3010 0.31      
16 A" 1370 1349 13.17      
17 A" 1040 1023 3.80      
18 A" 849 835 1.87      
19 A" 452 445 0.00      
20 A" 132 130 11.30      
21 A" 59i 58i 5.70      

Unscaled Zero Point Vibrational Energy (zpe) 13805.0 cm-1
Scaled (by 0.984) Zero Point Vibrational Energy (zpe) 13584.1 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 LSDA/6-31G(2df,p)
ABC
0.30859 0.15067 0.10315

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.830 -0.713 0.000
C2 0.000 0.556 0.000
C3 1.470 0.364 0.000
O4 -0.345 -1.815 0.000
O5 -0.583 1.617 0.000
H6 -1.936 -0.508 0.000
H7 1.989 1.331 0.000
H8 1.764 -0.240 0.876
H9 1.764 -0.240 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.51612.53961.20362.34281.12463.48252.77822.7782
C21.51611.48222.39531.21052.20852.13522.12422.1242
C32.53961.48222.83562.40463.51531.09781.10401.1040
O41.20362.39532.83563.43962.05883.91742.77342.7734
O52.34281.21052.40463.43962.51852.58803.11823.1182
H61.12462.20853.51532.05882.51854.33453.81123.8112
H73.48252.13521.09783.91742.58804.33451.81321.8132
H82.77822.12421.10402.77343.11823.81121.81321.7511
H92.77822.12421.10402.77343.11823.81121.81321.7511

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 115.767 C1 C2 O5 118.029
C2 C1 O4 123.049 C2 C1 H6 112.667
C2 C3 H7 110.824 C2 C3 H8 109.571
C2 C3 H9 109.571 C3 C2 O5 126.204
O4 C1 H6 124.284 H7 C3 H8 110.881
H7 C3 H9 110.881 H8 C3 H9 104.948
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.000      
2 C 0.281      
3 C -0.596      
4 O -0.162      
5 O -0.222      
6 H 0.123      
7 H 0.180      
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
  1.055 -0.108 0.000 1.060
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.907 1.856 0.000
y 1.856 -36.253 0.000
z 0.000 0.000 -26.961
Traceless
 xyz
x 5.700 1.856 0.000
y 1.856 -9.819 0.000
z 0.000 0.000 4.118
Polar
3z2-r28.237
x2-y210.346
xy1.856
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.409 -0.247 0.000
y -0.247 6.575 0.000
z 0.000 0.000 3.695


<r2> (average value of r2) Å2
<r2> 109.878
(<r2>)1/2 10.482