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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-266.399579
Energy at 298.15K-266.403708
HF Energy-265.636996
Nuclear repulsion energy159.244906
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/6-31G*
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' 3196 3044 5.15      
2 A' 3083 2936 0.57      
3 A' 3019 2875 69.56      
4 A' 1832 1745 11.17      
5 A' 1805 1719 146.50      
6 A' 1514 1441 13.87      
7 A' 1449 1380 30.74      
8 A' 1385 1319 3.09      
9 A' 1301 1239 20.80      
10 A' 1042 993 3.73      
11 A' 810 772 10.58      
12 A' 584 556 11.50      
13 A' 488 465 27.43      
14 A' 254 242 17.44      
15 A" 3154 3004 3.83      
16 A" 1515 1442 10.01      
17 A" 1090 1038 2.98      
18 A" 927 883 0.08      
19 A" 471 448 0.70      
20 A" 135 128 14.27      
21 A" 106 101 8.41      

Unscaled Zero Point Vibrational Energy (zpe) 14579.0 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 13883.6 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/6-31G*
ABC
0.30164 0.14722 0.10079

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.848 -0.723 0.000
C2 0.000 0.552 0.000
C3 1.496 0.382 0.000
O4 -0.357 -1.837 0.000
O5 -0.586 1.624 0.000
H6 -1.940 -0.542 0.000
H7 1.975 1.365 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
C11.53152.59141.21742.36211.10783.51072.84712.8471
C21.53151.50582.41601.22172.22752.13542.14382.1438
C32.59141.50582.89132.42453.55861.09281.09661.0966
O41.21742.41602.89133.46912.04613.96082.85762.8576
O52.36211.22172.42453.46912.55462.57403.13073.1307
H61.10782.22753.55862.04612.55464.35473.86563.8656
H73.51072.13541.09283.96082.57404.35471.79631.7963
H82.84712.14381.09662.85763.13073.86561.79631.7624
H92.84712.14381.09662.85763.13073.86561.79631.7624

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 117.117 C1 C2 O5 117.738
C2 C1 O4 122.619 C2 C1 H6 114.171
C2 C3 H7 109.498 C2 C3 H8 109.925
C2 C3 H9 109.925 C3 C2 O5 125.145
O4 C1 H6 123.211 H7 C3 H8 110.262
H7 C3 H9 110.262 H8 C3 H9 106.938
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability