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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-266.947034
Energy at 298.15K-266.950916
HF Energy-266.947034
Nuclear repulsion energy159.009362
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 PBEPBEultrafine/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' 3093 3058 3.72      
2 A' 2975 2941 0.12      
3 A' 2829 2797 90.89      
4 A' 1736 1716 155.95      
5 A' 1713 1694 63.65      
6 A' 1399 1383 16.64      
7 A' 1331 1316 44.34      
8 A' 1307 1292 0.55      
9 A' 1197 1184 18.45      
10 A' 969 958 3.34      
11 A' 761 752 14.81      
12 A' 545 539 12.82      
13 A' 463 458 21.00      
14 A' 237 234 15.07      
15 A" 3031 2997 0.75      
16 A" 1402 1386 10.50      
17 A" 1034 1022 3.58      
18 A" 860 850 0.27      
19 A" 444 439 0.09      
20 A" 108 107 9.33      
21 A" 69 68 11.86      

Unscaled Zero Point Vibrational Energy (zpe) 13750.6 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 13596.6 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 PBEPBEultrafine/aug-cc-pVTZ
ABC
0.30218 0.14569 0.10011

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.831 -0.743 0.000
C2 0.000 0.557 0.000
C3 1.493 0.418 0.000
O4 -0.344 -1.853 0.000
O5 -0.610 1.614 0.000
H6 -1.933 -0.555 0.000
H7 1.968 1.404 0.000
H8 1.812 -0.165 0.877
H9 1.812 -0.165 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54322.59851.21222.36741.11823.52762.84462.8446
C21.54321.50002.43461.22032.23032.14212.13902.1390
C32.59851.50002.92112.41983.56221.09431.10031.1003
O41.21222.43462.92113.47722.05233.99402.87552.8755
O52.36741.22032.41983.47722.54062.58603.13073.1307
H61.11822.23033.56222.05232.54064.36523.86683.8668
H73.52762.14211.09433.99402.58604.36521.80431.8043
H82.84462.13901.10032.87553.13073.86681.80431.7542
H92.84462.13901.10032.87553.13073.86681.80431.7542

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 117.264 C1 C2 O5 117.419
C2 C1 O4 123.708 C2 C1 H6 112.893
C2 C3 H7 110.346 C2 C3 H8 109.738
C2 C3 H9 109.738 C3 C2 O5 125.317
O4 C1 H6 123.399 H7 C3 H8 110.601
H7 C3 H9 110.601 H8 C3 H9 105.716
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.017      
2 C 0.501      
3 C -0.490      
4 O -0.497      
5 O -0.570      
6 H 0.386      
7 H 0.202      
8 H 0.225      
9 H 0.225      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.145 -0.052 0.000 1.147
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.625 2.343 0.000
y 2.343 -38.193 0.000
z 0.000 0.000 -27.765
Traceless
 xyz
x 6.354 2.343 0.000
y 2.343 -10.997 0.000
z 0.000 0.000 4.643
Polar
3z2-r29.286
x2-y211.568
xy2.343
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.751 -0.284 0.000
y -0.284 8.031 0.000
z 0.000 0.000 4.769


<r2> (average value of r2) Å2
<r2> 113.310
(<r2>)1/2 10.645