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 C2H3 (vinyl)

using model chemistry: B2PLYP=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B2PLYP=FULL/cc-pVTZ
 hartrees
Energy at 0K-77.862926
Energy at 298.15K-77.864442
HF Energy-77.756333
Nuclear repulsion energy28.561078
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 B2PLYP=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' 3273 3129 0.66      
2 A' 3181 3040 2.66      
3 A' 3083 2947 3.64      
4 A' 1675 1601 2.21      
5 A' 1410 1347 8.28      
6 A' 1064 1017 8.55      
7 A' 720 689 21.60      
8 A" 941 899 72.31      
9 A" 834 797 17.29      

Unscaled Zero Point Vibrational Energy (zpe) 8090.2 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 7732.6 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 B2PLYP=FULL/cc-pVTZ
ABC
7.93925 1.09733 0.96408

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.048 0.717 0.000
C2 0.048 -0.585 0.000
H3 -0.668 1.518 0.000
H4 -0.878 -1.154 0.000
H5 0.965 -1.160 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.30201.07482.08832.0890
C21.30202.22181.08771.0821
H31.07482.22182.68073.1369
H42.08831.08772.68071.8434
H52.08901.08213.13691.8434

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.563 C1 C2 H5 122.103
C2 C1 H3 138.184 H4 C2 H5 116.334
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability