return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: PBEPBEultrafine/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-266.860293
Energy at 298.15K-266.864171
HF Energy-266.860293
Nuclear repulsion energy158.533919
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/cc-pVDZ
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' 3113 3095 3.26      
2 A' 2982 2964 0.06      
3 A' 2813 2796 117.22      
4 A' 1754 1744 127.89      
5 A' 1741 1731 58.51      
6 A' 1371 1363 14.84      
7 A' 1314 1306 45.34      
8 A' 1291 1283 0.53      
9 A' 1201 1194 17.06      
10 A' 961 955 3.28      
11 A' 769 765 13.78      
12 A' 549 546 10.09      
13 A' 461 459 21.08      
14 A' 238 237 14.35      
15 A" 3053 3035 0.67      
16 A" 1377 1369 10.57      
17 A" 1029 1023 2.64      
18 A" 855 850 1.40      
19 A" 452 449 0.01      
20 A" 133 132 8.97      
21 A" 46 46 6.17      

Unscaled Zero Point Vibrational Energy (zpe) 13750.3 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 13670.6 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/cc-pVDZ
ABC
0.30036 0.14537 0.09979

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.734 0.000
C2 0.000 0.560 0.000
C3 1.497 0.393 0.000
O4 -0.355 -1.851 0.000
O5 -0.596 1.630 0.000
H6 -1.951 -0.526 0.000
H7 1.994 1.379 0.000
H8 1.808 -0.201 0.884
H9 1.808 -0.201 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54202.59381.21762.37641.13093.53452.84172.8417
C21.54201.50602.43681.22482.23282.15602.15182.1518
C32.59381.50602.90972.43063.56821.10401.10981.1098
O41.21762.43682.90973.48942.07413.99392.86082.8608
O52.37641.22482.43063.48942.54682.60213.14843.1484
H61.13092.23283.56822.07412.54684.38113.87543.8754
H73.53452.15601.10403.99392.60214.38111.81981.8198
H82.84172.15181.10982.86083.14843.87541.81981.7679
H92.84172.15181.10982.86083.14843.87541.81981.7679

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 116.629 C1 C2 O5 117.932
C2 C1 O4 123.590 C2 C1 H6 112.393
C2 C3 H7 110.443 C2 C3 H8 109.765
C2 C3 H9 109.765 C3 C2 O5 125.439
O4 C1 H6 124.017 H7 C3 H8 110.578
H7 C3 H9 110.578 H8 C3 H9 105.603
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.145      
2 C -0.033      
3 C -0.033      
4 O -0.137      
5 O -0.149      
6 H 0.010      
7 H 0.054      
8 H 0.072      
9 H 0.072      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.021 -0.065 0.000 1.023
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.426 1.718 0.000
y 1.718 -36.321 0.000
z 0.000 0.000 -27.230
Traceless
 xyz
x 5.349 1.718 0.000
y 1.718 -9.493 0.000
z 0.000 0.000 4.144
Polar
3z2-r28.287
x2-y29.895
xy1.718
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.558 -0.261 0.000
y -0.261 6.579 0.000
z 0.000 0.000 3.481


<r2> (average value of r2) Å2
<r2> 113.098
(<r2>)1/2 10.635