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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-266.870274
Energy at 298.15K-266.874305
HF Energy-266.870274
Nuclear repulsion energy160.043825
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
4/u)
Dep P Dep U
1 A' 3209 3052 3.75      
2 A' 3084 2933 0.01      
3 A' 2989 2843 86.75      
4 A' 1859 1768 59.48      
5 A' 1850 1760 141.24      
6 A' 1481 1408 15.44      
7 A' 1416 1347 45.16      
8 A' 1373 1305 2.65      
9 A' 1273 1211 22.18      
10 A' 1022 972 4.68      
11 A' 804 764 12.22      
12 A' 577 549 11.13      
13 A' 482 459 25.81      
14 A' 247 235 17.10      
15 A" 3153 2999 1.36      
16 A" 1486 1413 11.85      
17 A" 1084 1031 3.90      
18 A" 912 867 0.90      
19 A" 468 445 0.28      
20 A" 135 129 15.29      
21 A" 70 67 5.56      

Unscaled Zero Point Vibrational Energy (zpe) 14487.4 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 13777.5 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 HSEh1PBE/6-31G*
ABC
0.30452 0.14849 0.10168

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 -0.839 -0.725 0.000
C2 0.000 0.554 0.000
C3 1.489 0.386 0.000
O4 -0.356 -1.829 0.000
O5 -0.587 1.613 0.000
H6 -1.932 -0.535 0.000
H7 1.975 1.363 0.000
H8 1.800 -0.193 0.876
H9 1.800 -0.193 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52932.57921.20542.35181.10963.50362.83102.8310
C21.52931.49812.40951.21152.21772.13432.13682.1368
C32.57921.49812.88282.41163.54261.09071.09571.0957
O41.20542.40952.88283.45052.03963.95222.84472.8447
O52.35181.21152.41163.45052.53452.57473.11953.1195
H61.10962.21773.54262.03962.53454.34353.84883.8488
H73.50362.13431.09073.95222.57474.34351.79401.7940
H82.83102.13681.09572.84473.11953.84881.79401.7526
H92.83102.13681.09572.84473.11953.84881.79401.7526

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 116.844 C1 C2 O5 117.736
C2 C1 O4 123.109 C2 C1 H6 113.408
C2 C3 H7 110.065 C2 C3 H8 109.968
C2 C3 H9 109.968 C3 C2 O5 125.419
O4 C1 H6 123.482 H7 C3 H8 110.278
H7 C3 H9 110.278 H8 C3 H9 106.218
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 0.168      
2 C 0.390      
3 C -0.603      
4 O -0.354      
5 O -0.408      
6 H 0.165      
7 H 0.212      
8 H 0.216      
9 H 0.216      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.949 -0.050 0.000 0.950
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.788 1.992 0.000
y 1.992 -37.023 0.000
z 0.000 0.000 -26.967
Traceless
 xyz
x 6.207 1.992 0.000
y 1.992 -10.646 0.000
z 0.000 0.000 4.439
Polar
3z2-r28.877
x2-y211.235
xy1.992
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.708 -0.412 0.000
y -0.412 6.285 0.000
z 0.000 0.000 3.275


<r2> (average value of r2) Å2
<r2> 111.333
(<r2>)1/2 10.551