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: CCSD(T)=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 CCSD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-266.814429
Energy at 298.15K-266.818577
HF Energy-265.738111
Nuclear repulsion energy160.387958
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 CCSD(T)=FULL/cc-pVTZ
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' 3174 3040        
2 A' 3072 2943        
3 A' 2999 2873        
4 A' 1792 1717        
5 A' 1778 1703        
6 A' 1477 1415        
7 A' 1407 1348        
8 A' 1380 1322        
9 A' 1277 1224        
10 A' 1019 976        
11 A' 803 769        
12 A' 579 555        
13 A' 482 462        
14 A' 250 239        
15 A" 3126 2994        
16 A" 1484 1422        
17 A" 1087 1042        
18 A" 922 883        
19 A" 475 455        
20 A" 134 128        
21 A" 109 105        

Unscaled Zero Point Vibrational Energy (zpe) 14412.7 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 13807.4 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 CCSD(T)=FULL/cc-pVTZ
ABC
0.30636 0.14904 0.10213

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.840 -0.719 0.000
C2 0.000 0.550 0.000
C3 1.487 0.381 0.000
O4 -0.357 -1.826 0.000
O5 -0.581 1.614 0.000
H6 -1.922 -0.534 0.000
H7 1.964 1.354 0.000
H8 1.789 -0.194 0.873
H9 1.789 -0.194 -0.873

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.52162.57321.20762.34721.09783.48702.81872.8187
C21.52161.49612.40241.21242.20582.12262.12492.1249
C32.57321.49612.87542.40733.52861.08371.08831.0883
O41.20762.40242.87543.44712.02963.93672.83312.8331
O52.34721.21242.40733.44712.53132.55893.10613.1061
H61.09782.20583.52862.02962.53134.32003.82663.8266
H73.48702.12261.08373.93672.55894.32001.78581.7858
H82.81872.12491.08832.83313.10613.82661.78581.7458
H92.81872.12491.08832.83313.10613.82661.78581.7458

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 117.011 C1 C2 O5 117.867
C2 C1 O4 122.937 C2 C1 H6 113.751
C2 C3 H7 109.692 C2 C3 H8 109.604
C2 C3 H9 109.604 C3 C2 O5 125.122
O4 C1 H6 123.311 H7 C3 H8 110.614
H7 C3 H9 110.614 H8 C3 H9 106.662
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability