return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCD/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 CCD/TZVP
 hartrees
Energy at 0K-266.551710
Energy at 298.15K-266.555863
HF Energy-265.730915
Nuclear repulsion energy160.128866
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 CCD/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' 3204 3037 5.75      
2 A' 3090 2929 0.94      
3 A' 3034 2876 62.25      
4 A' 1851 1755 9.01      
5 A' 1838 1742 157.36      
6 A' 1497 1419 12.49      
7 A' 1440 1365 26.29      
8 A' 1413 1339 3.58      
9 A' 1285 1219 21.26      
10 A' 1041 987 2.83      
11 A' 805 763 10.77      
12 A' 590 560 12.49      
13 A' 498 473 25.83      
14 A' 258 244 15.22      
15 A" 3162 2998 5.11      
16 A" 1491 1413 9.49      
17 A" 1087 1031 1.26      
18 A" 925 876 0.01      
19 A" 465 441 1.08      
20 A" 133 126 7.33      
21 A" 97 92 16.41      

Unscaled Zero Point Vibrational Energy (zpe) 14601.9 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 13842.6 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 CCD/TZVP
ABC
0.30482 0.14829 0.10162

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.845 -0.726 0.000
C2 0.000 0.552 0.000
C3 1.494 0.387 0.000
O4 -0.364 -1.828 0.000
O5 -0.579 1.612 0.000
H6 -1.932 -0.544 0.000
H7 1.968 1.365 0.000
H8 1.802 -0.184 0.877
H9 1.802 -0.184 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53132.58991.20282.35271.10203.50512.84072.8407
C21.53131.50322.40751.20792.22092.13002.13532.1353
C32.58991.50322.89122.40763.55011.08731.09111.0911
O41.20282.40752.89123.44682.02643.95452.85742.8574
O52.35271.20792.40763.44682.54572.55893.10883.1088
H61.10202.22093.55012.02642.54574.34253.85263.8526
H73.50512.13001.08733.95452.55894.34251.78831.7883
H82.84072.13531.09112.85743.10883.85261.78831.7542
H92.84072.13531.09112.85743.10883.85261.78831.7542

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 117.189 C1 C2 O5 117.907
C2 C1 O4 122.964 C2 C1 H6 114.009
C2 C3 H7 109.575 C2 C3 H8 109.767
C2 C3 H9 109.767 C3 C2 O5 124.905
O4 C1 H6 123.027 H7 C3 H8 110.352
H7 C3 H9 110.352 H8 C3 H9 106.994
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability