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

using model chemistry: CCSD/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/6-31G*
 hartrees
Energy at 0K-266.395978
Energy at 298.15K-266.400129
HF Energy-265.637457
Nuclear repulsion energy159.427284
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/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' 3200 3022 4.74      
2 A' 3087 2915 0.49      
3 A' 3029 2860 64.73      
4 A' 1845 1742 13.40      
5 A' 1822 1720 133.28      
6 A' 1515 1431 13.67      
7 A' 1451 1370 31.14      
8 A' 1390 1313 3.33      
9 A' 1306 1233 20.37      
10 A' 1045 987 4.09      
11 A' 814 769 10.16      
12 A' 589 556 11.21      
13 A' 491 464 28.13      
14 A' 255 241 17.43      
15 A" 3158 2982 3.60      
16 A" 1516 1431 10.11      
17 A" 1093 1032 3.07      
18 A" 930 879 0.05      
19 A" 473 446 0.63      
20 A" 138 130 14.71      
21 A" 108 102 7.92      

Unscaled Zero Point Vibrational Energy (zpe) 14628.1 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 13813.3 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 CCSD/6-31G*
ABC
0.30205 0.14767 0.10104

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.848 -0.722 0.000
C2 0.000 0.551 0.000
C3 1.496 0.382 0.000
O4 -0.357 -1.834 0.000
O5 -0.585 1.621 0.000
H6 -1.940 -0.541 0.000
H7 1.973 1.364 0.000
H8 1.807 -0.192 0.881
H9 1.807 -0.192 -0.881

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52882.59011.21572.35791.10703.50812.84702.8470
C21.52881.50522.41151.22002.22602.13412.14312.1431
C32.59011.50522.88872.42173.55731.09251.09631.0963
O41.21572.41152.88873.46322.04353.95762.85672.8567
O52.35791.22002.42173.46322.55222.57033.12793.1279
H61.10702.22603.55732.04352.55224.35213.86503.8650
H73.50812.13411.09253.95762.57034.35211.79581.7958
H82.84702.14311.09632.85673.12793.86501.79581.7621
H92.84702.14311.09632.85673.12793.86501.79581.7621

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 117.227 C1 C2 O5 117.698
C2 C1 O4 122.554 C2 C1 H6 114.286
C2 C3 H7 109.456 C2 C3 H8 109.941
C2 C3 H9 109.941 C3 C2 O5 125.075
O4 C1 H6 123.159 H7 C3 H8 110.258
H7 C3 H9 110.258 H8 C3 H9 106.958
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability