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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-266.847101
Energy at 298.15K-266.851131
HF Energy-266.847101
Nuclear repulsion energy160.027242
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 PBE1PBE/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' 3210 3051 3.38      
2 A' 3086 2933 0.01      
3 A' 2991 2843 84.79      
4 A' 1863 1770 52.91      
5 A' 1854 1762 147.88      
6 A' 1481 1407 15.61      
7 A' 1416 1346 45.87      
8 A' 1372 1304 2.68      
9 A' 1274 1211 22.05      
10 A' 1022 971 4.84      
11 A' 804 765 12.15      
12 A' 578 549 11.07      
13 A' 482 458 25.78      
14 A' 246 234 17.08      
15 A" 3156 2999 1.14      
16 A" 1486 1412 12.06      
17 A" 1083 1030 4.04      
18 A" 911 866 0.89      
19 A" 468 445 0.26      
20 A" 135 129 15.27      
21 A" 70 67 5.61      

Unscaled Zero Point Vibrational Energy (zpe) 14495.1 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 13774.7 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 PBE1PBE/6-31G*
ABC
0.30446 0.14843 0.10165

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.726 0.000
C2 0.000 0.554 0.000
C3 1.489 0.387 0.000
O4 -0.355 -1.830 0.000
O5 -0.588 1.613 0.000
H6 -1.932 -0.536 0.000
H7 1.975 1.364 0.000
H8 1.801 -0.192 0.876
H9 1.801 -0.192 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52972.58001.20542.35201.10973.50442.83182.8318
C21.52971.49832.40991.21142.21832.13442.13702.1370
C32.58001.49832.88392.41163.54351.09081.09581.0958
O41.20542.40992.88393.45072.03953.95342.84602.8460
O52.35201.21142.41163.45072.53492.57463.11943.1194
H61.10972.21833.54352.03952.53494.34433.84973.8497
H73.50442.13441.09083.95342.57464.34431.79421.7942
H82.83182.13701.09582.84603.11943.84971.79421.7530
H92.83182.13701.09582.84603.11943.84971.79421.7530

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 116.865 C1 C2 O5 117.723
C2 C1 O4 123.114 C2 C1 H6 113.418
C2 C3 H7 110.055 C2 C3 H8 109.963
C2 C3 H9 109.963 C3 C2 O5 125.412
O4 C1 H6 123.468 H7 C3 H8 110.279
H7 C3 H9 110.279 H8 C3 H9 106.236
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.166      
2 C 0.388      
3 C -0.610      
4 O -0.354      
5 O -0.408      
6 H 0.167      
7 H 0.214      
8 H 0.218      
9 H 0.218      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.947 -0.049 0.000 0.949
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.774 1.992 0.000
y 1.992 -37.017 0.000
z 0.000 0.000 -26.975
Traceless
 xyz
x 6.222 1.992 0.000
y 1.992 -10.643 0.000
z 0.000 0.000 4.421
Polar
3z2-r28.841
x2-y211.243
xy1.992
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.699 -0.413 0.000
y -0.413 6.276 0.000
z 0.000 0.000 3.274


<r2> (average value of r2) Å2
<r2> 111.360
(<r2>)1/2 10.553