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

using model chemistry: CID/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 CID/3-21G*
 hartrees
Energy at 0K-264.601386
Energy at 298.15K-264.605710
HF Energy-264.142569
Nuclear repulsion energy159.358928
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 CID/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' 3240 3015 4.68      
2 A' 3144 2925 0.17      
3 A' 3099 2883 66.61      
4 A' 1828 1701 23.06      
5 A' 1790 1665 63.29      
6 A' 1578 1468 15.52      
7 A' 1510 1405 34.96      
8 A' 1424 1325 6.26      
9 A' 1268 1180 29.54      
10 A' 1064 990 2.10      
11 A' 794 739 12.58      
12 A' 605 562 9.17      
13 A' 489 455 23.31      
14 A' 266 247 20.02      
15 A" 3202 2980 2.91      
16 A" 1592 1482 12.99      
17 A" 1164 1083 5.05      
18 A" 1000 931 0.03      
19 A" 524 488 0.04      
20 A" 198 184 18.37      
21 A" 98 91 2.60      

Unscaled Zero Point Vibrational Energy (zpe) 14937.5 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 13899.4 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 CID/3-21G*
ABC
0.30244 0.14810 0.10128

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.858 -0.697 0.000
C2 0.000 0.561 0.000
C3 1.490 0.316 0.000
O4 -0.374 -1.822 0.000
O5 -0.553 1.657 0.000
H6 -1.934 -0.491 0.000
H7 2.020 1.266 0.000
H8 1.769 -0.267 0.880
H9 1.769 -0.267 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52262.55711.22522.37381.09483.48362.80412.8041
C21.52261.50982.41211.22802.20092.13942.14232.1423
C32.55711.50982.83612.44393.51701.08791.09151.0915
O41.22522.41212.83613.48412.05073.90702.79032.7903
O52.37381.22802.44393.48412.55352.60253.14143.1414
H61.09482.20093.51702.05072.55354.32613.81243.8124
H73.48362.13941.08793.90702.60254.32611.78471.7847
H82.80412.14231.09152.79033.14143.81241.78471.7595
H92.80412.14231.09152.79033.14143.81241.78471.7595

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 114.969 C1 C2 O5 118.931
C2 C1 O4 122.397 C2 C1 H6 113.461
C2 C3 H7 109.823 C2 C3 H8 109.833
C2 C3 H9 109.833 C3 C2 O5 126.101
O4 C1 H6 124.142 H7 C3 H8 109.953
H7 C3 H9 109.953 H8 C3 H9 107.412
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability