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

using model chemistry: B3LYP/6-31G*

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/6-31G*
 hartrees
Energy at 0K-267.147979
Energy at 298.15K-267.152011
HF Energy-267.147979
Nuclear repulsion energy159.387607
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/6-31G*
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' 3177 3051 5.62      
2 A' 3062 2941 0.08      
3 A' 2961 2844 91.60      
4 A' 1824 1752 78.58      
5 A' 1814 1742 113.06      
6 A' 1486 1427 14.14      
7 A' 1417 1361 34.25      
8 A' 1373 1319 3.35      
9 A' 1254 1204 26.16      
10 A' 1020 980 3.07      
11 A' 784 753 12.92      
12 A' 571 549 12.53      
13 A' 481 462 24.59      
14 A' 248 238 16.43      
15 A" 3120 2996 3.07      
16 A" 1492 1432 9.86      
17 A" 1081 1038 3.10      
18 A" 913 877 0.77      
19 A" 467 448 0.50      
20 A" 135 129 14.51      
21 A" 79 76 5.63      

Unscaled Zero Point Vibrational Energy (zpe) 14380.0 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 13809.1 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/6-31G*
ABC
0.30191 0.14698 0.10069

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.842 -0.730 0.000
C2 0.000 0.555 0.000
C3 1.498 0.394 0.000
O4 -0.360 -1.840 0.000
O5 -0.591 1.617 0.000
H6 -1.935 -0.539 0.000
H7 1.978 1.374 0.000
H8 1.813 -0.183 0.877
H9 1.813 -0.183 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53652.59571.20942.36091.11013.51852.84952.8495
C21.53651.50652.42161.21542.22292.14102.14532.1453
C32.59571.50652.90522.42063.55751.09121.09631.0963
O41.20942.42162.90523.46452.04303.97402.87042.8704
O52.36091.21542.42063.46452.54072.58063.12883.1288
H61.11012.22293.55752.04302.54074.35573.86633.8663
H73.51852.14101.09123.97402.58064.35571.79421.7942
H82.84952.14531.09632.87043.12883.86631.79421.7549
H92.84952.14531.09632.87043.12883.86631.79421.7549

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 117.080 C1 C2 O5 117.694
C2 C1 O4 123.303 C2 C1 H6 113.279
C2 C3 H7 109.979 C2 C3 H8 110.022
C2 C3 H9 110.022 C3 C2 O5 125.226
O4 C1 H6 123.418 H7 C3 H8 110.212
H7 C3 H9 110.212 H8 C3 H9 106.334
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.186      
2 C 0.397      
3 C -0.526      
4 O -0.352      
5 O -0.407      
6 H 0.139      
7 H 0.184      
8 H 0.190      
9 H 0.190      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.951 -0.032 0.000 0.951
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.986 1.995 0.000
y 1.995 -37.132 0.000
z 0.000 0.000 -26.975
Traceless
 xyz
x 6.068 1.995 0.000
y 1.995 -10.652 0.000
z 0.000 0.000 4.584
Polar
3z2-r29.169
x2-y211.146
xy1.995
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.753 -0.388 0.000
y -0.388 6.324 0.000
z 0.000 0.000 3.272


<r2> (average value of r2) Å2
<r2> 112.295
(<r2>)1/2 10.597