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

using model chemistry: MP2=FULL/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-266.751278
Energy at 298.15K-266.755451
HF Energy-265.737588
Nuclear repulsion energy160.591986
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/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3221 3058 2.48      
2 A' 3106 2949 0.07      
3 A' 3025 2871 66.50      
4 A' 1765 1676 30.29      
5 A' 1759 1670 99.43      
6 A' 1481 1406 15.77      
7 A' 1409 1337 37.57      
8 A' 1383 1313 0.69      
9 A' 1285 1220 13.33      
10 A' 1020 968 3.65      
11 A' 814 773 12.72      
12 A' 581 551 10.33      
13 A' 484 459 25.26      
14 A' 252 239 16.00      
15 A" 3172 3011 0.89      
16 A" 1490 1415 10.08      
17 A" 1093 1038 2.66      
18 A" 925 878 0.30      
19 A" 479 455 0.24      
20 A" 140 133 9.30      
21 A" 109 104 11.60      

Unscaled Zero Point Vibrational Energy (zpe) 14495.0 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 13761.6 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/cc-pVTZ
ABC
0.30811 0.14932 0.10244

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.833 -0.718 0.000
C2 0.000 0.549 0.000
C3 1.479 0.383 0.000
O4 -0.349 -1.827 0.000
O5 -0.586 1.613 0.000
H6 -1.915 -0.534 0.000
H7 1.960 1.351 0.000
H8 1.780 -0.194 0.870
H9 1.780 -0.194 -0.870

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.51632.56111.20962.34461.09683.47602.80332.8033
C21.51631.48842.40091.21522.19962.11762.11532.1153
C32.56111.48842.86782.40393.51541.08101.08571.0857
O41.20962.40092.86783.44822.03003.92802.82042.8204
O52.34461.21522.40393.44822.52542.55903.10113.1011
H61.09682.19963.51542.03002.52544.30863.81043.8104
H73.47602.11761.08103.92802.55904.30861.78181.7818
H82.80332.11531.08572.82043.10113.81041.78181.7393
H92.80332.11531.08572.82043.10113.81041.78181.7393

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 116.934 C1 C2 O5 117.844
C2 C1 O4 123.072 C2 C1 H6 113.682
C2 C3 H7 109.992 C2 C3 H8 109.525
C2 C3 H9 109.525 C3 C2 O5 125.222
O4 C1 H6 123.246 H7 C3 H8 110.640
H7 C3 H9 110.640 H8 C3 H9 106.450
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability