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

using model chemistry: HF/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/Def2TZVPP
 hartrees
Energy at 0K-265.752348
Energy at 298.15K-265.756678
HF Energy-265.752348
Nuclear repulsion energy161.770804
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 HF/Def2TZVPP
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' 3289 2981 9.47      
2 A' 3184 2886 1.03      
3 A' 3154 2858 62.49      
4 A' 2016 1828 12.43      
5 A' 1988 1802 346.60      
6 A' 1577 1429 14.68      
7 A' 1530 1387 22.55      
8 A' 1480 1341 7.51      
9 A' 1362 1234 25.60      
10 A' 1106 1002 4.19      
11 A' 837 759 11.82      
12 A' 621 563 17.66      
13 A' 527 478 36.37      
14 A' 267 242 19.22      
15 A" 3242 2939 7.66      
16 A" 1585 1437 8.97      
17 A" 1196 1084 2.36      
18 A" 1007 913 0.53      
19 A" 516 468 2.40      
20 A" 140 127 12.77      
21 A" 106 96 18.79      

Unscaled Zero Point Vibrational Energy (zpe) 15364.6 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 13926.5 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 HF/Def2TZVPP
ABC
0.30846 0.15116 0.10334

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.840 -0.729 0.000
C2 0.000 0.547 0.000
C3 1.492 0.403 0.000
O4 -0.365 -1.808 0.000
O5 -0.579 1.579 0.000
H6 -1.917 -0.553 0.000
H7 1.948 1.380 0.000
H8 1.805 -0.159 0.871
H9 1.805 -0.159 -0.871

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52802.59251.17822.32361.09083.49672.84292.8429
C21.52801.49872.38251.18362.20982.11902.12492.1249
C32.59251.49872.88692.38143.54011.07881.08271.0827
O41.17822.38252.88693.39371.99553.93882.86102.8610
O52.32361.18362.38143.39372.51742.53463.07623.0762
H61.09082.20983.54011.99552.51744.32153.84273.8427
H73.49672.11901.07883.93882.53464.32151.77451.7745
H82.84292.12491.08272.86103.07623.84271.77451.7416
H92.84292.12491.08272.86103.07623.84271.77451.7416

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 117.850 C1 C2 O5 117.373
C2 C1 O4 122.850 C2 C1 H6 114.051
C2 C3 H7 109.513 C2 C3 H8 109.751
C2 C3 H9 109.751 C3 C2 O5 124.776
O4 C1 H6 123.100 H7 C3 H8 110.358
H7 C3 H9 110.358 H8 C3 H9 107.079
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.246      
2 C 0.298      
3 C -0.155      
4 O -0.359      
5 O -0.376      
6 H 0.080      
7 H 0.109      
8 H 0.079      
9 H 0.079      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.929 -0.011 0.000 0.929
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.877 2.442 0.000
y 2.442 -38.984 0.000
z 0.000 0.000 -27.382
Traceless
 xyz
x 7.306 2.442 0.000
y 2.442 -12.354 0.000
z 0.000 0.000 5.048
Polar
3z2-r210.097
x2-y213.107
xy2.442
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.943 -0.449 0.000
y -0.449 6.632 0.000
z 0.000 0.000 3.990


<r2> (average value of r2) Å2
<r2> 110.454
(<r2>)1/2 10.510