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

using model chemistry: QCISD/TZVP

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/TZVP
 hartrees
Energy at 0K-266.565172
Energy at 298.15K-266.569275
HF Energy-265.729927
Nuclear repulsion energy159.707561
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/TZVP
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' 3193 3050 6.20      
2 A' 3080 2942 1.07      
3 A' 3014 2879 69.82      
4 A' 1815 1734 6.64      
5 A' 1793 1712 183.41      
6 A' 1492 1425 12.96      
7 A' 1434 1370 24.46      
8 A' 1400 1337 3.15      
9 A' 1275 1218 21.28      
10 A' 1035 989 2.18      
11 A' 796 760 11.30      
12 A' 581 555 12.95      
13 A' 492 470 24.29      
14 A' 255 244 15.13      
15 A" 3151 3010 5.42      
16 A" 1487 1421 9.31      
17 A" 1079 1031 1.12      
18 A" 917 876 0.00      
19 A" 460 439 1.21      
20 A" 127 121 5.70      
21 A" 90 86 18.10      

Unscaled Zero Point Vibrational Energy (zpe) 14481.6 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 13834.3 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 QCISD/TZVP
ABC
0.30373 0.14736 0.10107

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.844 -0.729 0.000
C2 0.000 0.554 0.000
C3 1.496 0.389 0.000
O4 -0.361 -1.835 0.000
O5 -0.583 1.617 0.000
H6 -1.932 -0.546 0.000
H7 1.970 1.368 0.000
H8 1.803 -0.183 0.878
H9 1.803 -0.183 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53582.59351.20752.36061.10333.51002.84192.8419
C21.53581.50462.41631.21262.22362.13192.13632.1363
C32.59351.50462.89742.41423.55341.08791.09181.0918
O41.20752.41632.89743.45962.03283.96182.86042.8604
O52.36061.21262.41423.45962.54972.56543.11503.1150
H61.10332.22363.55342.03282.54974.34693.85423.8542
H73.51002.13191.08793.96182.56544.34691.79001.7900
H82.84192.13631.09182.86043.11503.85421.79001.7552
H92.84192.13631.09182.86043.11503.85421.79001.7552

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 117.072 C1 C2 O5 117.910
C2 C1 O4 123.035 C2 C1 H6 113.816
C2 C3 H7 109.587 C2 C3 H8 109.701
C2 C3 H9 109.701 C3 C2 O5 125.018
O4 C1 H6 123.148 H7 C3 H8 110.413
H7 C3 H9 110.413 H8 C3 H9 106.988
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability