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

using model chemistry: mPW1PW91/6-31+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 mPW1PW91/6-31+G**
 hartrees
Energy at 0K-267.093248
Energy at 298.15K-267.097249
HF Energy-267.093248
Nuclear repulsion energy159.949798
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 mPW1PW91/6-31+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' 3209 3054 3.14      
2 A' 3081 2932 0.05      
3 A' 3001 2856 68.31      
4 A' 1845 1756 91.68      
5 A' 1832 1743 159.15      
6 A' 1461 1391 17.37      
7 A' 1403 1335 47.28      
8 A' 1365 1299 2.11      
9 A' 1266 1205 18.96      
10 A' 1016 967 4.65      
11 A' 800 762 12.68      
12 A' 576 548 12.16      
13 A' 485 461 26.06      
14 A' 245 233 17.29      
15 A" 3154 3002 0.87      
16 A" 1466 1396 12.98      
17 A" 1077 1026 4.07      
18 A" 906 863 0.28      
19 A" 468 446 0.24      
20 A" 119 114 19.00      
21 A" 64 61 7.15      

Unscaled Zero Point Vibrational Energy (zpe) 14418.8 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 13723.8 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 mPW1PW91/6-31+G**
ABC
0.30446 0.14797 0.10142

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.834 -0.734 0.000
C2 0.000 0.551 0.000
C3 1.489 0.410 0.000
O4 -0.345 -1.837 0.000
O5 -0.602 1.604 0.000
H6 -1.927 -0.556 0.000
H7 1.955 1.394 0.000
H8 1.809 -0.164 0.875
H9 1.809 -0.164 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53222.59001.20602.34971.10693.50862.84182.8418
C21.53221.49592.41221.21282.22202.12912.13232.1323
C32.59001.49592.90032.40783.54991.08871.09381.0938
O41.20602.41222.90033.45002.03503.96582.86402.8640
O52.34971.21282.40783.45002.53392.56543.11433.1143
H61.10692.22203.54992.03502.53394.34413.85643.8564
H73.50862.12911.08873.96582.56544.34411.79251.7925
H82.84182.13231.09382.86403.11433.85641.79251.7497
H92.84182.13231.09382.86403.11433.85641.79251.7497

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 117.587 C1 C2 O5 117.263
C2 C1 O4 123.077 C2 C1 H6 113.722
C2 C3 H7 109.929 C2 C3 H8 109.879
C2 C3 H9 109.879 C3 C2 O5 125.150
O4 C1 H6 123.201 H7 C3 H8 110.432
H7 C3 H9 110.432 H8 C3 H9 106.228
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.149      
2 C 0.298      
3 C -0.534      
4 O -0.324      
5 O -0.370      
6 H 0.164      
7 H 0.204      
8 H 0.207      
9 H 0.207      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.062 -0.055 0.000 1.064
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.049 2.447 0.000
y 2.447 -38.673 0.000
z 0.000 0.000 -27.523
Traceless
 xyz
x 7.049 2.447 0.000
y 2.447 -11.887 0.000
z 0.000 0.000 4.838
Polar
3z2-r29.676
x2-y212.624
xy2.447
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.509 -0.542 0.000
y -0.542 7.302 0.000
z 0.000 0.000 3.957


<r2> (average value of r2) Å2
<r2> 112.077
(<r2>)1/2 10.587