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

using model chemistry: HF/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-265.744796
Energy at 298.15K-265.749147
HF Energy-265.744796
Nuclear repulsion energy161.708556
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/aug-cc-pVTZ
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' 3286 2991 9.37      
2 A' 3181 2896 0.84      
3 A' 3154 2871 58.67      
4 A' 2012 1832 13.42      
5 A' 1984 1806 354.64      
6 A' 1577 1436 15.02      
7 A' 1530 1393 21.91      
8 A' 1479 1347 7.40      
9 A' 1362 1240 24.52      
10 A' 1107 1008 4.10      
11 A' 838 763 11.57      
12 A' 621 565 17.88      
13 A' 527 480 36.44      
14 A' 267 243 19.32      
15 A" 3239 2949 7.35      
16 A" 1586 1444 8.76      
17 A" 1197 1090 2.74      
18 A" 1008 918 0.50      
19 A" 516 470 2.36      
20 A" 141 129 12.53      
21 A" 109 99 19.89      

Unscaled Zero Point Vibrational Energy (zpe) 15360.2 cm-1
Scaled (by 0.9104) Zero Point Vibrational Energy (zpe) 13983.9 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 HF/aug-cc-pVTZ
ABC
0.30825 0.15107 0.10328

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.731 0.000
C2 0.000 0.548 0.000
C3 1.493 0.404 0.000
O4 -0.364 -1.810 0.000
O5 -0.582 1.580 0.000
H6 -1.916 -0.551 0.000
H7 1.949 1.382 0.000
H8 1.807 -0.158 0.870
H9 1.807 -0.158 -0.870

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53002.59371.17852.32541.09163.49812.84372.8437
C21.53001.49962.38601.18432.20882.11962.12632.1263
C32.59371.49962.89012.38413.53991.07851.08301.0830
O41.17852.38602.89013.39671.99763.94192.86362.8636
O52.32541.18432.38413.39672.51432.53793.07933.0793
H61.09162.20883.53991.99762.51434.32103.84313.8431
H73.49812.11961.07853.94192.53794.32101.77481.7748
H82.84372.12631.08302.86363.07933.84311.77481.7410
H92.84372.12631.08302.86363.07933.84311.77481.7410

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 117.764 C1 C2 O5 117.332
C2 C1 O4 122.992 C2 C1 H6 113.773
C2 C3 H7 109.514 C2 C3 H8 109.780
C2 C3 H9 109.780 C3 C2 O5 124.904
O4 C1 H6 123.235 H7 C3 H8 110.379
H7 C3 H9 110.379 H8 C3 H9 106.977
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.037      
2 C 0.574      
3 C -0.694      
4 O -0.642      
5 O -0.721      
6 H 0.584      
7 H 0.298      
8 H 0.320      
9 H 0.320      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.951 -0.017 0.000 0.951
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.879 2.505 0.000
y 2.505 -39.117 0.000
z 0.000 0.000 -27.454
Traceless
 xyz
x 7.407 2.505 0.000
y 2.505 -12.451 0.000
z 0.000 0.000 5.044
Polar
3z2-r210.088
x2-y213.238
xy2.505
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.280 -0.392 0.000
y -0.392 6.931 0.000
z 0.000 0.000 4.307


<r2> (average value of r2) Å2
<r2> 110.550
(<r2>)1/2 10.514