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

using model chemistry: B3PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/cc-pVDZ
 hartrees
Energy at 0K-267.062708
Energy at 298.15K-267.066725
HF Energy-267.062708
Nuclear repulsion energy159.731557
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 B3PW91/cc-pVDZ
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' 3188 3076 3.06      
2 A' 3058 2951 0.14      
3 A' 2933 2830 93.99      
4 A' 1832 1768 76.48      
5 A' 1822 1758 141.15      
6 A' 1421 1371 15.80      
7 A' 1369 1321 43.39      
8 A' 1338 1291 1.49      
9 A' 1250 1206 17.87      
10 A' 999 964 4.23      
11 A' 795 767 12.86      
12 A' 572 552 11.25      
13 A' 479 463 24.91      
14 A' 244 236 15.90      
15 A" 3135 3025 0.84      
16 A" 1428 1378 11.07      
17 A" 1072 1035 3.16      
18 A" 895 863 1.47      
19 A" 471 454 0.11      
20 A" 139 134 12.87      
21 A" 59 57 5.81      

Unscaled Zero Point Vibrational Energy (zpe) 14249.0 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 13750.3 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 B3PW91/cc-pVDZ
ABC
0.30387 0.14771 0.10126

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.837 -0.730 0.000
C2 0.000 0.554 0.000
C3 1.491 0.393 0.000
O4 -0.356 -1.835 0.000
O5 -0.590 1.614 0.000
H6 -1.938 -0.531 0.000
H7 1.978 1.375 0.000
H8 1.803 -0.191 0.880
H9 1.803 -0.191 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53292.58451.20582.35641.11893.51512.83462.8346
C21.53291.49942.41581.21262.22172.14152.14042.1404
C32.58451.49942.89362.41253.55141.09651.10161.1016
O41.20582.41582.89363.45682.05083.96892.85242.8524
O52.35641.21262.41253.45682.53342.57913.12413.1241
H61.11892.22173.55142.05082.53344.35573.85853.8585
H73.51512.14151.09653.96892.57914.35571.80541.8054
H82.83462.14041.10162.85243.12413.85851.80541.7602
H92.83462.14041.10162.85243.12413.85851.80541.7602

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 116.923 C1 C2 O5 117.773
C2 C1 O4 123.353 C2 C1 H6 112.881
C2 C3 H7 110.200 C2 C3 H8 109.812
C2 C3 H9 109.812 C3 C2 O5 125.304
O4 C1 H6 123.767 H7 C3 H8 110.439
H7 C3 H9 110.439 H8 C3 H9 106.060
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.165      
2 C -0.014      
3 C -0.061      
4 O -0.171      
5 O -0.182      
6 H 0.031      
7 H 0.068      
8 H 0.082      
9 H 0.082      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.973 -0.056 0.000 0.975
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.990 1.880 0.000
y 1.880 -36.710 0.000
z 0.000 0.000 -27.034
Traceless
 xyz
x 5.882 1.880 0.000
y 1.880 -10.198 0.000
z 0.000 0.000 4.316
Polar
3z2-r28.632
x2-y210.720
xy1.880
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.116 -0.332 0.000
y -0.332 6.328 0.000
z 0.000 0.000 3.404


<r2> (average value of r2) Å2
<r2> 111.725
(<r2>)1/2 10.570