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: LSDA/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 LSDA/cc-pVTZ
 hartrees
Energy at 0K-265.850018
Energy at 298.15K 
HF Energy-265.850018
Nuclear repulsion energy161.045313
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 LSDA/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' 3106 3072 1.30      
2 A' 2975 2942 2.16      
3 A' 2822 2791 83.29      
4 A' 1797 1778 154.12      
5 A' 1775 1756 49.53      
6 A' 1366 1351 17.66      
7 A' 1325 1311 74.39      
8 A' 1287 1273 0.26      
9 A' 1226 1213 5.71      
10 A' 964 954 5.69      
11 A' 799 790 13.66      
12 A' 559 553 9.69      
13 A' 466 461 24.60      
14 A' 240 237 17.45      
15 A" 3039 3006 0.27      
16 A" 1366 1351 14.18      
17 A" 1037 1026 4.56      
18 A" 850 841 1.08      
19 A" 448 443 0.00      
20 A" 117 116 12.40      
21 A" 28i 28i 7.87      

Unscaled Zero Point Vibrational Energy (zpe) 13768.2 cm-1
Scaled (by 0.9891) Zero Point Vibrational Energy (zpe) 13618.2 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 LSDA/cc-pVTZ
ABC
0.31013 0.15075 0.10335

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.824 -0.721 0.000
C2 0.000 0.551 0.000
C3 1.466 0.385 0.000
O4 -0.334 -1.818 0.000
O5 -0.594 1.605 0.000
H6 -1.928 -0.527 0.000
H7 1.964 1.360 0.000
H8 1.770 -0.213 0.873
H9 1.770 -0.213 -0.873

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.51522.54241.20172.33711.12153.47862.78342.7834
C21.51521.47512.39271.21012.20942.12422.11642.1164
C32.54241.47512.84502.39423.51451.09481.10131.1013
O41.20172.39272.84503.43322.05123.92212.78702.7870
O52.33711.21012.39423.43322.51542.57023.10773.1077
H61.12152.20943.51452.05122.51544.32583.81303.8130
H73.47862.12421.09483.92212.57024.32581.80941.8094
H82.78342.11641.10132.78703.10773.81301.80941.7467
H92.78342.11641.10132.78703.10773.81301.80941.7467

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 116.465 C1 C2 O5 117.657
C2 C1 O4 123.040 C2 C1 H6 113.001
C2 C3 H7 110.620 C2 C3 H8 109.611
C2 C3 H9 109.611 C3 C2 O5 125.878
O4 C1 H6 123.959 H7 C3 H8 110.955
H7 C3 H9 110.955 H8 C3 H9 104.937
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.063      
2 C 0.128      
3 C -0.326      
4 O -0.168      
5 O -0.186      
6 H 0.081      
7 H 0.133      
8 H 0.138      
9 H 0.138      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.127 -0.110 0.000 1.133
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.288 2.128 0.000
y 2.128 -37.450 0.000
z 0.000 0.000 -27.587
Traceless
 xyz
x 6.230 2.128 0.000
y 2.128 -10.512 0.000
z 0.000 0.000 4.282
Polar
3z2-r28.564
x2-y211.162
xy2.128
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.030 -0.302 0.000
y -0.302 7.104 0.000
z 0.000 0.000 4.114


<r2> (average value of r2) Å2
<r2> 110.166
(<r2>)1/2 10.496