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

using model chemistry: MP2/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-266.686476
Energy at 298.15K-266.690560
HF Energy-265.747775
Nuclear repulsion energy159.953653
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/Def2TZVPP
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' 3219 3062 2.57      
2 A' 3091 2941 0.09      
3 A' 3010 2864 63.72      
4 A' 1745 1660 36.46      
5 A' 1741 1657 101.00      
6 A' 1469 1398 15.53      
7 A' 1403 1335 33.66      
8 A' 1365 1299 1.35      
9 A' 1272 1211 15.80      
10 A' 1013 964 3.53      
11 A' 804 765 12.53      
12 A' 573 546 10.49      
13 A' 480 456 25.26      
14 A' 247 235 15.75      
15 A" 3170 3016 0.88      
16 A" 1479 1407 10.11      
17 A" 1079 1027 2.61      
18 A" 910 866 0.08      
19 A" 467 444 0.28      
20 A" 133 127 13.46      
21 A" 94 89 8.45      

Unscaled Zero Point Vibrational Energy (zpe) 14381.8 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 13684.3 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/Def2TZVPP
ABC
0.30536 0.14807 0.10156

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.841 -0.726 0.000
C2 0.000 0.556 0.000
C3 1.490 0.380 0.000
O4 -0.365 -1.835 0.000
O5 -0.575 1.623 0.000
H6 -1.927 -0.529 0.000
H7 1.967 1.354 0.000
H8 1.793 -0.194 0.874
H9 1.793 -0.194 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53322.57951.20702.36411.10383.49432.82572.8257
C21.53321.50002.41891.21222.21162.12272.13112.1311
C32.57951.50002.88872.41023.53541.08491.08881.0888
O41.20702.41892.88873.46472.03623.95062.84852.8485
O52.36411.21222.41023.46472.54162.55653.11033.1103
H61.10382.21163.53542.03622.54164.32553.83603.8360
H73.49432.12271.08493.95062.55654.32551.78611.7861
H82.82572.13111.08882.84853.11033.83601.78611.7484
H92.82572.13111.08882.84853.11033.83601.78611.7484

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 116.508 C1 C2 O5 118.414
C2 C1 O4 123.511 C2 C1 H6 112.987
C2 C3 H7 109.361 C2 C3 H8 109.795
C2 C3 H9 109.795 C3 C2 O5 125.078
O4 C1 H6 123.502 H7 C3 H8 110.516
H7 C3 H9 110.516 H8 C3 H9 106.826
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability