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

using model chemistry: CCSD(T)/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)/TZVP
 hartrees
Energy at 0K-266.594933
Energy at 298.15K-266.599017
HF Energy-265.728625
Nuclear repulsion energy159.389487
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)/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' 3178 3059        
2 A' 3061 2947        
3 A' 2991 2879        
4 A' 1767 1701        
5 A' 1753 1687        
6 A' 1480 1424        
7 A' 1419 1365        
8 A' 1386 1334        
9 A' 1262 1214        
10 A' 1024 986        
11 A' 788 759        
12 A' 576 554        
13 A' 486 468        
14 A' 252 243        
15 A" 3133 3015        
16 A" 1474 1419        
17 A" 1063 1023        
18 A" 902 868        
19 A" 450 433        
20 A" 133 128        
21 A" 93 90        

Unscaled Zero Point Vibrational Energy (zpe) 14336.1 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 13798.5 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 CCSD(T)/TZVP
ABC
0.30251 0.14700 0.10077

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.846 -0.727 0.000
C2 0.000 0.553 0.000
C3 1.498 0.387 0.000
O4 -0.360 -1.838 0.000
O5 -0.584 1.622 0.000
H6 -1.936 -0.543 0.000
H7 1.973 1.367 0.000
H8 1.805 -0.187 0.879
H9 1.805 -0.187 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53392.59461.21302.36321.10503.51112.84402.8440
C21.53391.50682.41811.21822.22452.13412.13922.1392
C32.59461.50682.89862.42053.55701.08921.09341.0934
O41.21302.41812.89863.46742.03923.96432.86082.8608
O52.36321.21822.42053.46742.55262.56963.12263.1226
H61.10502.22453.55702.03922.55264.35033.85853.8585
H73.51112.13411.08923.96432.56964.35031.79311.7931
H82.84402.13921.09342.86083.12263.85851.79311.7572
H92.84402.13921.09342.86083.12263.85851.79311.7572

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 117.140 C1 C2 O5 117.883
C2 C1 O4 122.928 C2 C1 H6 113.923
C2 C3 H7 109.538 C2 C3 H8 109.689
C2 C3 H9 109.689 C3 C2 O5 124.977
O4 C1 H6 123.149 H7 C3 H8 110.478
H7 C3 H9 110.478 H8 C3 H9 106.934
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability