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: mPW1PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-311G**
 hartrees
Energy at 0K-267.148932
Energy at 298.15K-267.152961
HF Energy-267.148932
Nuclear repulsion energy160.422955
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 mPW1PW91/6-311G**
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' 3189 3051 4.66      
2 A' 3068 2936 0.07      
3 A' 2958 2830 89.62      
4 A' 1848 1768 93.92      
5 A' 1836 1757 141.17      
6 A' 1456 1393 16.80      
7 A' 1393 1333 47.15      
8 A' 1359 1300 1.91      
9 A' 1259 1204 19.83      
10 A' 1012 968 4.13      
11 A' 796 761 13.33      
12 A' 577 552 12.41      
13 A' 485 464 26.55      
14 A' 246 235 16.55      
15 A" 3135 2999 2.27      
16 A" 1460 1397 12.60      
17 A" 1084 1037 3.36      
18 A" 907 867 0.81      
19 A" 473 452 0.16      
20 A" 133 127 16.29      
21 A" 57 55 5.48      

Unscaled Zero Point Vibrational Energy (zpe) 14364.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13742.4 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 mPW1PW91/6-311G**
ABC
0.30598 0.14879 0.10197

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.835 -0.730 0.000
C2 0.000 0.554 0.000
C3 1.488 0.396 0.000
O4 -0.354 -1.828 0.000
O5 -0.590 1.605 0.000
H6 -1.927 -0.539 0.000
H7 1.965 1.373 0.000
H8 1.800 -0.181 0.874
H9 1.800 -0.181 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53182.58141.19822.34781.10813.50202.82982.8298
C21.53181.49592.40781.20502.21482.12862.13122.1312
C32.58141.49592.88752.40323.53981.08761.09261.0926
O41.19822.40782.88753.44052.03323.95282.84872.8487
O52.34781.20502.40323.44052.52622.56463.10823.1082
H61.10812.21483.53982.03322.52624.33563.84403.8440
H73.50202.12861.08763.95282.56464.33561.79071.7907
H82.82982.13121.09262.84873.10823.84401.79071.7475
H92.82982.13121.09262.84873.10823.84401.79071.7475

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 116.984 C1 C2 O5 117.662
C2 C1 O4 123.299 C2 C1 H6 113.084
C2 C3 H7 109.957 C2 C3 H8 109.864
C2 C3 H9 109.864 C3 C2 O5 125.354
O4 C1 H6 123.617 H7 C3 H8 110.445
H7 C3 H9 110.445 H8 C3 H9 106.203
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.158      
2 C 0.137      
3 C -0.337      
4 O -0.260      
5 O -0.276      
6 H 0.112      
7 H 0.154      
8 H 0.156      
9 H 0.156      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.957 -0.057 0.000 0.959
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.018 2.091 0.000
y 2.091 -37.467 0.000
z 0.000 0.000 -27.193
Traceless
 xyz
x 6.312 2.091 0.000
y 2.091 -10.861 0.000
z 0.000 0.000 4.549
Polar
3z2-r29.098
x2-y211.449
xy2.091
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.110 -0.395 0.000
y -0.395 6.467 0.000
z 0.000 0.000 3.542


<r2> (average value of r2) Å2
<r2> 111.251
(<r2>)1/2 10.548