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

using model chemistry: mPW1PW91/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-267.116690
Energy at 298.15K-267.120732
HF Energy-267.116690
Nuclear repulsion energy159.980688
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/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3202 3068 4.04      
2 A' 3069 2941 0.04      
3 A' 2976 2852 70.60      
4 A' 1829 1752 100.03      
5 A' 1815 1739 146.49      
6 A' 1430 1371 16.01      
7 A' 1379 1322 44.15      
8 A' 1349 1293 1.39      
9 A' 1262 1209 14.08      
10 A' 1006 964 4.56      
11 A' 803 769 12.19      
12 A' 573 550 12.35      
13 A' 483 463 27.03      
14 A' 244 234 17.18      
15 A" 3143 3012 1.46      
16 A" 1437 1377 10.33      
17 A" 1074 1029 3.65      
18 A" 897 859 0.43      
19 A" 470 450 0.35      
20 A" 122 117 13.23      
21 A" 78 75 11.51      

Unscaled Zero Point Vibrational Energy (zpe) 14320.1 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 13722.9 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/aug-cc-pVDZ
ABC
0.30473 0.14805 0.10151

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.832 -0.735 0.000
C2 0.000 0.551 0.000
C3 1.489 0.412 0.000
O4 -0.344 -1.836 0.000
O5 -0.603 1.602 0.000
H6 -1.930 -0.554 0.000
H7 1.956 1.399 0.000
H8 1.805 -0.167 0.878
H9 1.805 -0.167 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53172.58881.20442.34831.11243.51152.83692.8369
C21.53171.49502.41171.21172.22362.13232.13142.1314
C32.58881.49502.90062.40623.55221.09241.09801.0980
O41.20442.41172.90063.44792.03923.96992.85942.8594
O52.34831.21172.40623.44792.53162.56703.11373.1137
H61.11242.22363.55222.03922.53164.34923.85593.8559
H73.51152.13231.09243.96992.56704.34921.80161.8016
H82.83692.13141.09802.85943.11373.85591.80161.7560
H92.83692.13141.09802.85943.11373.85591.80161.7560

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 117.581 C1 C2 O5 117.258
C2 C1 O4 123.184 C2 C1 H6 113.538
C2 C3 H7 110.016 C2 C3 H8 109.614
C2 C3 H9 109.614 C3 C2 O5 125.161
O4 C1 H6 123.278 H7 C3 H8 110.670
H7 C3 H9 110.670 H8 C3 H9 106.183
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.791      
2 C 0.203      
3 C 0.344      
4 O -0.522      
5 O -0.567      
6 H -0.148      
7 H -0.139      
8 H 0.020      
9 H 0.020      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.073 -0.048 0.000 1.074
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.123 2.450 0.000
y 2.450 -38.309 0.000
z 0.000 0.000 -27.459
Traceless
 xyz
x 6.761 2.450 0.000
y 2.450 -11.517 0.000
z 0.000 0.000 4.757
Polar
3z2-r29.513
x2-y212.186
xy2.450
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.069 -0.357 0.000
y -0.357 7.556 0.000
z 0.000 0.000 4.511


<r2> (average value of r2) Å2
<r2> 111.948
(<r2>)1/2 10.581