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

using model chemistry: QCISD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-311G**
 hartrees
Energy at 0K-266.542354
Energy at 298.15K-266.546504
HF Energy-265.707227
Nuclear repulsion energy159.516583
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 QCISD/6-311G**
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' 3182 3036 6.60      
2 A' 3071 2930 1.20      
3 A' 2990 2852 84.24      
4 A' 1828 1744 8.97      
5 A' 1805 1722 173.61      
6 A' 1484 1416 12.51      
7 A' 1422 1357 27.47      
8 A' 1380 1316 3.43      
9 A' 1276 1217 20.06      
10 A' 1028 980 2.49      
11 A' 798 762 11.45      
12 A' 580 554 11.98      
13 A' 487 464 26.93      
14 A' 252 240 15.21      
15 A" 3142 2998 5.90      
16 A" 1491 1423 9.15      
17 A" 1087 1037 1.54      
18 A" 923 880 0.12      
19 A" 472 451 0.67      
20 A" 138 131 12.06      
21 A" 106 101 8.48      

Unscaled Zero Point Vibrational Energy (zpe) 14469.8 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 13805.7 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 QCISD/6-311G**
ABC
0.30231 0.14726 0.10087

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.849 -0.726 0.000
C2 0.000 0.557 0.000
C3 1.500 0.378 0.000
O4 -0.368 -1.833 0.000
O5 -0.576 1.623 0.000
H6 -1.941 -0.533 0.000
H7 1.985 1.357 0.000
H8 1.803 -0.199 0.880
H9 1.803 -0.199 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53932.59611.20672.36511.10853.51722.84352.8435
C21.53931.51062.41831.21132.22612.13962.14392.1439
C32.59611.51062.89452.42053.55941.09171.09541.0954
O41.20672.41832.89453.46202.04073.96312.85562.8556
O52.36511.21132.42053.46202.55142.57473.12303.1230
H61.10852.22613.55942.04072.55144.35663.86003.8600
H73.51722.13961.09173.96312.57474.35661.79671.7967
H82.84352.14391.09542.85563.12303.86001.79671.7603
H92.84352.14391.09542.85563.12303.86001.79671.7603

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 116.689 C1 C2 O5 118.105
C2 C1 O4 122.987 C2 C1 H6 113.438
C2 C3 H7 109.561 C2 C3 H8 109.682
C2 C3 H9 109.682 C3 C2 O5 125.206
O4 C1 H6 123.576 H7 C3 H8 110.472
H7 C3 H9 110.472 H8 C3 H9 106.936
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability