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 HCCO (ketenyl radical)

using model chemistry: CCSD=FULL/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 2Π
Energy calculated at CCSD=FULL/aug-cc-pVQZ
 hartrees
Energy at 0K-151.787282
Energy at 298.15K 
HF Energy-151.152237
Nuclear repulsion energy52.826213
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=FULL/aug-cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at CCSD=FULL/aug-cc-pVQZ
B
0.36379

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.020
C2 0.000 0.000 -1.234
O3 0.000 0.000 1.197
H4 0.000 0.000 -2.291

Atom - Atom Distances (Å)
  C1 C2 O3 H4
C11.25421.17622.3114
C21.25422.43041.0572
O31.17622.43043.4876
H42.31141.05723.4876

picture of ketenyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 180.000 C2 C1 O3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability