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: B3LYP/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/6-311G*
 hartrees
Energy at 0K-267.219836
Energy at 298.15K-267.223880
HF Energy-267.219836
Nuclear repulsion energy159.721625
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 B3LYP/6-311G*
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' 3153 3047 8.67      
2 A' 3046 2944 0.38      
3 A' 2930 2831 105.59      
4 A' 1812 1751 112.94      
5 A' 1800 1739 110.73      
6 A' 1476 1427 17.89      
7 A' 1406 1359 40.43      
8 A' 1363 1318 2.52      
9 A' 1240 1198 23.82      
10 A' 1015 981 2.48      
11 A' 776 750 14.02      
12 A' 571 552 13.87      
13 A' 483 467 24.24      
14 A' 248 239 15.90      
15 A" 3099 2995 5.45      
16 A" 1478 1428 11.97      
17 A" 1081 1045 3.15      
18 A" 910 879 0.47      
19 A" 471 456 0.25      
20 A" 134 129 15.37      
21 A" 77 75 5.68      

Unscaled Zero Point Vibrational Energy (zpe) 14285.2 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 13803.7 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 B3LYP/6-311G*
ABC
0.30319 0.14718 0.10091

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.735 0.000
C2 0.000 0.556 0.000
C3 1.496 0.400 0.000
O4 -0.362 -1.838 0.000
O5 -0.591 1.611 0.000
H6 -1.932 -0.545 0.000
H7 1.973 1.379 0.000
H8 1.818 -0.173 0.874
H9 1.818 -0.173 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53962.59651.20202.35831.10963.51772.85252.8525
C21.53961.50452.42131.20852.22382.13752.14482.1448
C32.59651.50452.90902.41283.55641.08891.09381.0938
O41.20202.42132.90903.45602.03423.97502.87842.8784
O52.35831.20852.41283.45602.53862.57383.12193.1219
H61.10962.22383.55642.03422.53864.35313.86823.8682
H73.51772.13751.08893.97502.57384.35311.78871.7887
H82.85252.14481.09382.87843.12193.86821.78871.7487
H92.85252.14481.09382.87843.12193.86821.78871.7487

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 117.064 C1 C2 O5 117.717
C2 C1 O4 123.592 C2 C1 H6 113.161
C2 C3 H7 109.976 C2 C3 H8 110.266
C2 C3 H9 110.266 C3 C2 O5 125.219
O4 C1 H6 123.247 H7 C3 H8 110.063
H7 C3 H9 110.063 H8 C3 H9 106.144
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.042      
2 C 0.235      
3 C -0.680      
4 O -0.247      
5 O -0.263      
6 H 0.189      
7 H 0.241      
8 H 0.242      
9 H 0.242      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.935 -0.041 0.000 0.936
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.458 2.060 0.000
y 2.060 -37.734 0.000
z 0.000 0.000 -27.437
Traceless
 xyz
x 6.128 2.060 0.000
y 2.060 -10.787 0.000
z 0.000 0.000 4.659
Polar
3z2-r29.317
x2-y211.276
xy2.060
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.174 -0.371 0.000
y -0.371 6.507 0.000
z 0.000 0.000 3.520


<r2> (average value of r2) Å2
<r2> 112.425
(<r2>)1/2 10.603