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

using model chemistry: CCD/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 CCD/cc-pVDZ
 hartrees
Energy at 0K-266.443405
Energy at 298.15K-266.447595
HF Energy-265.661134
Nuclear repulsion energy159.321735
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 CCD/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' 3207 3068 4.86      
2 A' 3085 2952 1.27      
3 A' 3010 2880 77.68      
4 A' 1867 1786 15.09      
5 A' 1850 1769 138.09      
6 A' 1463 1399 12.00      
7 A' 1410 1349 28.00      
8 A' 1378 1318 3.86      
9 A' 1284 1229 18.23      
10 A' 1023 979 3.68      
11 A' 811 776 10.65      
12 A' 587 562 10.45      
13 A' 489 467 27.48      
14 A' 252 241 15.27      
15 A" 3168 3031 3.84      
16 A" 1472 1408 8.64      
17 A" 1089 1041 2.07      
18 A" 922 883 0.34      
19 A" 480 459 0.46      
20 A" 153 147 12.69      
21 A" 107 102 5.93      

Unscaled Zero Point Vibrational Energy (zpe) 14552.4 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13922.3 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 CCD/cc-pVDZ
ABC
0.30144 0.14730 0.10082

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.853 -0.722 0.000
C2 0.000 0.556 0.000
C3 1.501 0.370 0.000
O4 -0.373 -1.831 0.000
O5 -0.570 1.627 0.000
H6 -1.952 -0.524 0.000
H7 1.997 1.352 0.000
H8 1.805 -0.213 0.886
H9 1.805 -0.213 -0.886

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53612.59451.20862.36531.11723.52452.84752.8475
C21.53611.51242.41611.21312.23132.15002.15312.1531
C32.59451.51242.89082.42263.56721.10011.10391.1039
O41.20862.41612.89083.46342.04993.96862.85442.8544
O52.36531.21312.42263.46342.55662.58233.13273.1327
H61.11722.23133.56722.04992.55664.37253.87313.8731
H73.52452.15001.10013.96862.58234.37251.80891.8089
H82.84752.15311.10392.85443.13273.87311.80891.7729
H92.84752.15311.10392.85443.13273.87311.80891.7729

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 116.653 C1 C2 O5 118.239
C2 C1 O4 122.904 C2 C1 H6 113.536
C2 C3 H7 109.756 C2 C3 H8 109.782
C2 C3 H9 109.782 C3 C2 O5 125.108
O4 C1 H6 123.560 H7 C3 H8 110.318
H7 C3 H9 110.318 H8 C3 H9 106.841
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability