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

using model chemistry: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-264.144263
Energy at 298.15K-264.148710
HF Energy-264.144263
Nuclear repulsion energy161.030271
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 HF/3-21G*
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' 3317 2994 4.43      
2 A' 3231 2916 54.32      
3 A' 3218 2905 0.44      
4 A' 1961 1770 27.09      
5 A' 1922 1735 134.13      
6 A' 1622 1464 17.15      
7 A' 1572 1419 39.26      
8 A' 1484 1339 9.02      
9 A' 1319 1190 32.90      
10 A' 1113 1005 3.00      
11 A' 823 743 13.17      
12 A' 632 570 12.13      
13 A' 512 462 30.45      
14 A' 281 254 23.41      
15 A" 3272 2953 2.52      
16 A" 1642 1482 14.70      
17 A" 1226 1107 6.74      
18 A" 1054 951 0.30      
19 A" 553 499 0.23      
20 A" 201 182 25.73      
21 A" 99 89 3.17      

Unscaled Zero Point Vibrational Energy (zpe) 15526.6 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 14014.3 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 HF/3-21G*
ABC
0.30660 0.15152 0.10331

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.850 -0.696 0.000
C2 0.000 0.556 0.000
C3 1.481 0.325 0.000
O4 -0.370 -1.802 0.000
O5 -0.556 1.630 0.000
H6 -1.914 -0.498 0.000
H7 2.006 1.268 0.000
H8 1.764 -0.253 0.872
H9 1.764 -0.253 -0.872

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.51352.54471.20552.34441.08253.46622.79072.7907
C21.51351.49912.38681.20912.18522.12862.12772.1277
C32.54471.49912.81902.41963.49351.07971.08391.0839
O41.20552.38682.81903.43672.02143.88172.77662.7766
O52.34441.20912.41963.43672.52412.58763.11283.1128
H61.08252.18523.49352.02142.52414.29953.78773.7877
H73.46622.12861.07973.88172.58764.29951.77051.7705
H82.79072.12771.08392.77663.11283.78771.77051.7446
H92.79072.12771.08392.77663.11283.78771.77051.7446

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 115.275 C1 C2 O5 118.449
C2 C1 O4 122.357 C2 C1 H6 113.610
C2 C3 H7 110.197 C2 C3 H8 109.873
C2 C3 H9 109.873 C3 C2 O5 126.275
O4 C1 H6 124.033 H7 C3 H8 109.834
H7 C3 H9 109.834 H8 C3 H9 107.180
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.288      
2 C 0.403      
3 C -0.666      
4 O -0.501      
5 O -0.524      
6 H 0.242      
7 H 0.253      
8 H 0.252      
9 H 0.252      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.745 -0.083 0.000 0.750
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.064 2.178 0.000
y 2.178 -39.553 0.000
z 0.000 0.000 -27.619
Traceless
 xyz
x 7.522 2.178 0.000
y 2.178 -12.712 0.000
z 0.000 0.000 5.190
Polar
3z2-r210.379
x2-y213.489
xy2.178
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.654 -0.647 0.000
y -0.647 5.688 0.000
z 0.000 0.000 2.689


<r2> (average value of r2) Å2
<r2> 110.510
(<r2>)1/2 10.512