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

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/TZVP
 hartrees
Energy at 0K-266.683710
Energy at 298.15K-266.687763
HF Energy-265.728864
Nuclear repulsion energy159.490078
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)=FULL/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' 3177 3037        
2 A' 3060 2925        
3 A' 2990 2859        
4 A' 1769 1691        
5 A' 1755 1678        
6 A' 1480 1415        
7 A' 1419 1356        
8 A' 1387 1326        
9 A' 1263 1207        
10 A' 1025 979        
11 A' 789 754        
12 A' 577 551        
13 A' 486 465        
14 A' 254 242        
15 A" 3132 2994        
16 A" 1475 1410        
17 A" 1064 1017        
18 A" 903 863        
19 A" 450 431        
20 A" 119 114        
21 A" 88 84        

Unscaled Zero Point Vibrational Energy (zpe) 14329.9 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 13699.4 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)=FULL/TZVP
ABC
0.30292 0.14718 0.10090

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.845 -0.726 0.000
C2 0.000 0.553 0.000
C3 1.497 0.386 0.000
O4 -0.360 -1.837 0.000
O5 -0.583 1.621 0.000
H6 -1.934 -0.543 0.000
H7 1.972 1.365 0.000
H8 1.803 -0.188 0.878
H9 1.803 -0.188 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53292.59271.21222.36191.10433.50892.84192.8419
C21.53291.50572.41661.21752.22302.13302.13782.1378
C32.59271.50572.89672.41903.55451.08861.09271.0927
O41.21222.41662.89673.46542.03793.96182.85882.8588
O52.36191.21752.41903.46542.55112.56833.12073.1207
H61.10432.22303.55452.03792.55114.34773.85593.8559
H73.50892.13301.08863.96182.56834.34771.79191.7919
H82.84192.13781.09272.85883.12073.85591.79191.7558
H92.84192.13781.09272.85883.12073.85591.79191.7558

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 117.127 C1 C2 O5 117.893
C2 C1 O4 122.939 C2 C1 H6 113.917
C2 C3 H7 109.561 C2 C3 H8 109.698
C2 C3 H9 109.698 C3 C2 O5 124.980
O4 C1 H6 123.143 H7 C3 H8 110.467
H7 C3 H9 110.467 H8 C3 H9 106.913
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability