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

using model chemistry: HSEh1PBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HSEh1PBE/6-31G**
 hartrees
Energy at 0K-266.875769
Energy at 298.15K-266.879780
HF Energy-266.875769
Nuclear repulsion energy160.088618
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 HSEh1PBE/6-31G**
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' 3208 3061 3.30      
2 A' 3078 2937 0.02      
3 A' 2976 2840 83.42      
4 A' 1858 1773 61.49      
5 A' 1849 1765 138.98      
6 A' 1461 1394 14.59      
7 A' 1401 1337 46.63      
8 A' 1364 1302 2.34      
9 A' 1268 1210 20.23      
10 A' 1013 967 5.10      
11 A' 802 766 12.31      
12 A' 576 550 10.94      
13 A' 481 459 26.15      
14 A' 245 234 17.30      
15 A" 3151 3007 1.17      
16 A" 1469 1401 11.48      
17 A" 1079 1029 3.75      
18 A" 906 865 0.93      
19 A" 467 446 0.26      
20 A" 135 129 15.56      
21 A" 58 56 5.32      

Unscaled Zero Point Vibrational Energy (zpe) 14422.4 cm-1
Scaled (by 0.9543) Zero Point Vibrational Energy (zpe) 13763.3 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 HSEh1PBE/6-31G**
ABC
0.30480 0.14856 0.10174

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.838 -0.726 0.000
C2 0.000 0.553 0.000
C3 1.488 0.387 0.000
O4 -0.353 -1.829 0.000
O5 -0.588 1.613 0.000
H6 -1.931 -0.534 0.000
H7 1.973 1.363 0.000
H8 1.797 -0.193 0.875
H9 1.797 -0.193 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52922.57851.20552.35151.10983.50212.82782.8278
C21.52921.49712.40891.21162.21642.13262.13392.1339
C32.57851.49712.88162.41083.54111.08961.09471.0947
O41.20552.40892.88163.45002.04153.95012.84092.8409
O52.35151.21162.41083.45002.53212.57353.11733.1173
H61.10982.21643.54112.04152.53214.34073.84523.8452
H73.50212.13261.08963.95012.57354.34071.79371.7937
H82.82782.13391.09472.84093.11733.84521.79371.7505
H92.82782.13391.09472.84093.11733.84521.79371.7505

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 116.867 C1 C2 O5 117.709
C2 C1 O4 123.052 C2 C1 H6 113.295
C2 C3 H7 110.067 C2 C3 H8 109.866
C2 C3 H9 109.866 C3 C2 O5 125.424
O4 C1 H6 123.653 H7 C3 H8 110.400
H7 C3 H9 110.400 H8 C3 H9 106.172
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.224      
2 C 0.363      
3 C -0.461      
4 O -0.364      
5 O -0.409      
6 H 0.126      
7 H 0.170      
8 H 0.175      
9 H 0.175      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.962 -0.055 0.000 0.964
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.724 2.000 0.000
y 2.000 -37.022 0.000
z 0.000 0.000 -26.967
Traceless
 xyz
x 6.271 2.000 0.000
y 2.000 -10.677 0.000
z 0.000 0.000 4.406
Polar
3z2-r28.813
x2-y211.298
xy2.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.766 -0.408 0.000
y -0.408 6.317 0.000
z 0.000 0.000 3.317


<r2> (average value of r2) Å2
<r2> 111.250
(<r2>)1/2 10.548