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

using model chemistry: MP2=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-264.671351
Energy at 298.15K-264.675563
HF Energy-264.136552
Nuclear repulsion energy157.625591
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 MP2=FULL/3-21G*
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' 3203 3037 4.90      
2 A' 3101 2940 0.20      
3 A' 3014 2857 87.28      
4 A' 1642 1557 8.26      
5 A' 1591 1508 20.56      
6 A' 1552 1471 18.11      
7 A' 1476 1399 34.93      
8 A' 1382 1310 3.81      
9 A' 1228 1164 28.89      
10 A' 1023 970 1.68      
11 A' 768 728 13.86      
12 A' 577 547 7.34      
13 A' 467 443 17.12      
14 A' 254 241 18.32      
15 A" 3167 3003 2.59      
16 A" 1575 1493 12.07      
17 A" 1131 1073 4.29      
18 A" 975 924 0.02      
19 A" 510 483 0.02      
20 A" 198 188 13.48      
21 A" 89 85 2.36      

Unscaled Zero Point Vibrational Energy (zpe) 14461.4 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 13709.4 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 MP2=FULL/3-21G*
ABC
0.29877 0.14448 0.09919

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.861 -0.698 0.000
C2 0.000 0.565 0.000
C3 1.494 0.310 0.000
O4 -0.369 -1.848 0.000
O5 -0.559 1.687 0.000
H6 -1.942 -0.486 0.000
H7 2.030 1.261 0.000
H8 1.770 -0.276 0.883
H9 1.770 -0.276 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52872.56241.25122.40401.10163.49282.80742.8074
C21.52871.51612.44121.25382.20872.14642.14952.1495
C32.56241.51612.85132.47283.52801.09161.09501.0950
O41.25122.44122.85133.54032.08093.92722.79732.7973
O52.40401.25382.47283.54032.57622.62463.17193.1719
H61.10162.20873.52802.08092.57624.34023.82183.8218
H73.49282.14641.09163.92722.62464.34021.79181.7918
H82.80742.14951.09502.79733.17193.82181.79181.7654
H92.80742.14951.09502.79733.17193.82181.79181.7654

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 114.612 C1 C2 O5 119.209
C2 C1 O4 122.525 C2 C1 H6 113.225
C2 C3 H7 109.721 C2 C3 H8 109.767
C2 C3 H9 109.767 C3 C2 O5 126.179
O4 C1 H6 124.250 H7 C3 H8 110.057
H7 C3 H9 110.057 H8 C3 H9 107.441
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability