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

using model chemistry: mPW1PW91/aug-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 mPW1PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-267.179699
Energy at 298.15K-267.183731
HF Energy-267.179699
Nuclear repulsion energy160.556551
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/aug-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' 3184 3050 3.55      
2 A' 3065 2936 0.09      
3 A' 2959 2835 71.44      
4 A' 1836 1759 122.81      
5 A' 1820 1743 128.05      
6 A' 1453 1392 16.72      
7 A' 1394 1335 42.13      
8 A' 1362 1305 1.38      
9 A' 1259 1207 18.39      
10 A' 1014 971 4.20      
11 A' 795 762 13.24      
12 A' 573 549 13.23      
13 A' 484 464 26.01      
14 A' 244 234 16.70      
15 A" 3127 2996 1.01      
16 A" 1458 1397 10.59      
17 A" 1085 1040 3.87      
18 A" 906 868 0.44      
19 A" 468 448 0.38      
20 A" 120 115 15.42      
21 A" 72 69 8.94      

Unscaled Zero Point Vibrational Energy (zpe) 14338.7 cm-1
Scaled (by 0.9581) Zero Point Vibrational Energy (zpe) 13737.9 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/aug-cc-pVTZ
ABC
0.30679 0.14886 0.10209

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.830 -0.734 0.000
C2 0.000 0.552 0.000
C3 1.485 0.408 0.000
O4 -0.347 -1.830 0.000
O5 -0.598 1.598 0.000
H6 -1.921 -0.551 0.000
H7 1.955 1.387 0.000
H8 1.799 -0.168 0.872
H9 1.799 -0.168 -0.872

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53082.58191.19762.34381.10583.50102.82772.8277
C21.53081.49202.40711.20492.21482.12592.12482.1248
C32.58191.49202.89252.39873.53831.08561.09101.0910
O41.19762.40712.89253.43722.02813.95582.85152.8515
O52.34381.20492.39873.43722.52342.56173.10203.1020
H61.10582.21483.53832.02812.52344.33323.84003.8400
H73.50102.12591.08563.95582.56174.33321.78891.7889
H82.82772.12481.09102.85153.10203.84001.78891.7439
H92.82772.12481.09102.85153.10203.84001.78891.7439

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 117.322 C1 C2 O5 117.406
C2 C1 O4 123.358 C2 C1 H6 113.297
C2 C3 H7 110.135 C2 C3 H8 109.718
C2 C3 H9 109.718 C3 C2 O5 125.272
O4 C1 H6 123.345 H7 C3 H8 110.542
H7 C3 H9 110.542 H8 C3 H9 106.109
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.099      
2 C 0.560      
3 C -0.474      
4 O -0.581      
5 O -0.666      
6 H 0.405      
7 H 0.192      
8 H 0.232      
9 H 0.232      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.068 -0.052 0.000 1.069
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.066 2.375 0.000
y 2.375 -38.067 0.000
z 0.000 0.000 -27.397
Traceless
 xyz
x 6.665 2.375 0.000
y 2.375 -11.336 0.000
z 0.000 0.000 4.670
Polar
3z2-r29.340
x2-y212.001
xy2.375
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.065 -0.331 0.000
y -0.331 7.504 0.000
z 0.000 0.000 4.534


<r2> (average value of r2) Å2
<r2> 111.320
(<r2>)1/2 10.551