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

using model chemistry: QCISD/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-266.506287
Energy at 298.15K-266.510386
HF Energy-265.676215
Nuclear repulsion energy158.662088
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/aug-cc-pVDZ
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' 3174 3075 5.85      
2 A' 3053 2958 0.67      
3 A' 3001 2907 62.86      
4 A' 1786 1730 7.14      
5 A' 1763 1708 198.58      
6 A' 1452 1407 13.34      
7 A' 1397 1353 24.43      
8 A' 1353 1311 2.15      
9 A' 1274 1234 15.55      
10 A' 1015 983 3.08      
11 A' 799 774 10.72      
12 A' 572 554 11.92      
13 A' 481 466 27.42      
14 A' 246 238 16.14      
15 A" 3128 3030 4.44      
16 A" 1460 1414 7.88      
17 A" 1070 1037 2.22      
18 A" 905 877 0.03      
19 A" 463 448 0.95      
20 A" 131 127 6.51      
21 A" 102 99 18.39      

Unscaled Zero Point Vibrational Energy (zpe) 14312.2 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 13864.2 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/aug-cc-pVDZ
ABC
0.29957 0.14580 0.09991

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.848 -0.733 0.000
C2 0.000 0.554 0.000
C3 1.504 0.397 0.000
O4 -0.357 -1.847 0.000
O5 -0.593 1.624 0.000
H6 -1.947 -0.551 0.000
H7 1.978 1.389 0.000
H8 1.814 -0.182 0.887
H9 1.814 -0.182 -0.887

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54162.60941.21742.37051.11453.53382.85972.8597
C21.54161.51222.42771.22272.23902.14682.14952.1495
C32.60941.51222.91522.42933.57911.09901.10351.1035
O41.21742.42772.91523.47872.05213.99002.87602.8760
O52.37051.22272.42933.47872.56162.58173.13723.1372
H61.11452.23903.57912.05212.56164.37833.88243.8824
H73.53382.14681.09903.99002.58174.37831.81101.8110
H82.85972.14951.10352.87603.13723.88241.81101.7731
H92.85972.14951.10352.87603.13723.88241.81101.7731

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 117.400 C1 C2 O5 117.621
C2 C1 O4 122.831 C2 C1 H6 113.943
C2 C3 H7 109.584 C2 C3 H8 109.533
C2 C3 H9 109.533 C3 C2 O5 124.979
O4 C1 H6 123.226 H7 C3 H8 110.620
H7 C3 H9 110.620 H8 C3 H9 106.908
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability