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

using model chemistry: CCSD(T)/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 CCSD(T)/6-31G*
 hartrees
Energy at 0K-266.422261
Energy at 298.15K-266.426371
HF Energy-265.635814
Nuclear repulsion energy159.006559
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 CCSD(T)/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' 3183 3062        
2 A' 3068 2952        
3 A' 2997 2884        
4 A' 1790 1722        
5 A' 1770 1703        
6 A' 1507 1450        
7 A' 1437 1383        
8 A' 1375 1323        
9 A' 1291 1242        
10 A' 1034 995        
11 A' 804 774        
12 A' 580 558        
13 A' 484 465        
14 A' 250 241        
15 A" 3139 3020        
16 A" 1507 1450        
17 A" 1077 1036        
18 A" 916 881        
19 A" 463 446        
20 A" 136 131        
21 A" 110 106        

Unscaled Zero Point Vibrational Energy (zpe) 14459.1 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 13911.1 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 CCSD(T)/6-31G*
ABC
0.30081 0.14695 0.10057

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.849 -0.721 0.000
C2 0.000 0.550 0.000
C3 1.498 0.381 0.000
O4 -0.357 -1.840 0.000
O5 -0.586 1.628 0.000
H6 -1.944 -0.539 0.000
H7 1.976 1.365 0.000
H8 1.809 -0.194 0.882
H9 1.809 -0.194 -0.882

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52882.59281.22202.36341.10933.51142.84992.8499
C21.52881.50762.41641.22632.22822.13702.14592.1459
C32.59281.50762.89322.42843.56241.09391.09791.0979
O41.22202.41642.89323.47482.05103.96352.85992.8599
O52.36341.22632.42843.47482.55742.57493.13553.1355
H61.10932.22823.56242.05102.55744.35733.87033.8703
H73.51142.13701.09393.96352.57494.35731.79881.7988
H82.84992.14591.09792.85993.13553.87031.79881.7646
H92.84992.14591.09792.85993.13553.87031.79881.7646

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 117.278 C1 C2 O5 117.729
C2 C1 O4 122.517 C2 C1 H6 114.323
C2 C3 H7 109.428 C2 C3 H8 109.901
C2 C3 H9 109.901 C3 C2 O5 124.993
O4 C1 H6 123.160 H7 C3 H8 110.308
H7 C3 H9 110.308 H8 C3 H9 106.965
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability