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

using model chemistry: mPW1PW91/TZVP

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/TZVP
 hartrees
Energy at 0K-267.173411
Energy at 298.15K-267.177444
HF Energy-267.173411
Nuclear repulsion energy160.409347
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/TZVP
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' 3190 3044 3.60      
2 A' 3070 2929 0.09      
3 A' 2965 2829 75.30      
4 A' 1842 1758 101.88      
5 A' 1827 1743 140.54      
6 A' 1459 1392 16.95      
7 A' 1399 1334 46.83      
8 A' 1372 1309 1.34      
9 A' 1257 1200 22.06      
10 A' 1015 968 4.20      
11 A' 793 757 13.30      
12 A' 576 549 13.20      
13 A' 489 466 24.15      
14 A' 248 237 16.58      
15 A" 3136 2992 1.36      
16 A" 1462 1394 13.00      
17 A" 1079 1029 3.33      
18 A" 905 863 0.35      
19 A" 470 448 0.39      
20 A" 122 116 17.16      
21 A" 68 65 7.26      

Unscaled Zero Point Vibrational Energy (zpe) 14371.6 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 13710.5 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/TZVP
ABC
0.30642 0.14848 0.10187

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.832 -0.735 0.000
C2 0.000 0.553 0.000
C3 1.486 0.406 0.000
O4 -0.350 -1.832 0.000
O5 -0.595 1.601 0.000
H6 -1.923 -0.552 0.000
H7 1.957 1.386 0.000
H8 1.802 -0.168 0.873
H9 1.802 -0.168 -0.873

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53312.58371.19822.34751.10673.50342.83232.8323
C21.53311.49352.41031.20522.21832.12672.12862.1286
C32.58371.49352.89462.40033.54181.08681.09191.0919
O41.19822.41032.89463.44132.02823.95882.85662.8566
O52.34751.20522.40033.44132.52952.56163.10513.1051
H61.10672.21833.54182.02822.52954.33733.84583.8458
H73.50342.12671.08683.95882.56164.33731.78921.7892
H82.83232.12861.09192.85663.10513.84581.78921.7464
H92.83232.12861.09192.85663.10513.84581.78921.7464

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 117.212 C1 C2 O5 117.525
C2 C1 O4 123.412 C2 C1 H6 113.360
C2 C3 H7 110.017 C2 C3 H8 109.859
C2 C3 H9 109.859 C3 C2 O5 125.263
O4 C1 H6 123.228 H7 C3 H8 110.415
H7 C3 H9 110.415 H8 C3 H9 106.208
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.110      
2 C 0.164      
3 C -0.352      
4 O -0.236      
5 O -0.235      
6 H 0.096      
7 H 0.157      
8 H 0.147      
9 H 0.147      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.031 -0.056 0.000 1.032
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.074 2.378 0.000
y 2.378 -38.240 0.000
z 0.000 0.000 -27.318
Traceless
 xyz
x 6.705 2.378 0.000
y 2.378 -11.544 0.000
z 0.000 0.000 4.839
Polar
3z2-r29.679
x2-y212.166
xy2.378
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.348 -0.503 0.000
y -0.503 6.984 0.000
z 0.000 0.000 3.887


<r2> (average value of r2) Å2
<r2> 111.538
(<r2>)1/2 10.561