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 CH2CCH2 (allene)

using model chemistry: CCSD=FULL/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at CCSD=FULL/cc-pVQZ
 hartrees
Energy at 0K-116.528118
Energy at 298.15K 
HF Energy-115.913580
Nuclear repulsion energy59.469687
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/cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at CCSD=FULL/cc-pVQZ
ABC
4.89094 0.29963 0.29963

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.000 0.000 1.302
C3 0.000 0.000 -1.302
H4 0.000 0.925 1.856
H5 0.000 -0.925 1.856
H6 0.925 0.000 -1.856
H7 -0.925 0.000 -1.856

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.30151.30152.07332.07332.07332.0733
C21.30152.60311.07801.07803.28983.2898
C31.30152.60313.28983.28981.07801.0780
H42.07331.07803.28981.84933.93503.9350
H52.07331.07803.28981.84933.93503.9350
H62.07333.28981.07803.93503.93501.8493
H72.07333.28981.07803.93503.93501.8493

picture of allene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 120.933 C1 C2 H5 120.933
C1 C3 H6 120.933 C1 C3 H7 120.933
C2 C1 C3 180.000 H4 C2 H5 118.134
H6 C3 H7 118.134
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability