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

using model chemistry: MP4/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/6-311G**
 hartrees
Energy at 0K-266.578631
Energy at 298.15K-266.582699
HF Energy-265.704409
Nuclear repulsion energy158.781655
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 MP4/6-311G**
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' 3171 3075        
2 A' 3055 2963        
3 A' 2947 2858        
4 A' 1736 1683        
5 A' 1716 1664        
6 A' 1471 1426        
7 A' 1401 1359        
8 A' 1354 1313        
9 A' 1253 1215        
10 A' 1010 980        
11 A' 785 761        
12 A' 564 547        
13 A' 473 459        
14 A' 246 239        
15 A" 3131 3036        
16 A" 1480 1435        
17 A" 1067 1035        
18 A" 905 878        
19 A" 461 447        
20 A" 134 130        
21 A" 96 94        

Unscaled Zero Point Vibrational Energy (zpe) 14228.0 cm-1
Scaled (by 0.9697) Zero Point Vibrational Energy (zpe) 13796.9 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 MP4/6-311G**
ABC
0.30069 0.14573 0.09998

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.849 -0.727 0.000
C2 0.000 0.560 0.000
C3 1.502 0.377 0.000
O4 -0.366 -1.845 0.000
O5 -0.580 1.635 0.000
H6 -1.943 -0.529 0.000
H7 1.990 1.355 0.000
H8 1.803 -0.203 0.881
H9 1.803 -0.203 -0.881

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54132.59671.21712.37771.11213.52012.84252.8425
C21.54131.51292.43181.22222.22692.14272.14652.1465
C32.59671.51292.90222.43273.56171.09321.09681.0968
O41.21712.43182.90223.48652.05363.97332.85892.8589
O52.37771.22222.43273.48652.55752.58493.13593.1359
H61.11212.22693.56172.05362.55754.36043.86143.8614
H73.52012.14271.09323.97332.58494.36041.79991.7999
H82.84252.14651.09682.85893.13593.86141.79991.7617
H92.84252.14651.09682.85893.13593.86141.79991.7617

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 116.465 C1 C2 O5 118.260
C2 C1 O4 123.237 C2 C1 H6 113.134
C2 C3 H7 109.559 C2 C3 H8 109.648
C2 C3 H9 109.648 C3 C2 O5 125.275
O4 C1 H6 123.629 H7 C3 H8 110.542
H7 C3 H9 110.542 H8 C3 H9 106.862
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability