return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for C2H3 (vinyl)

using model chemistry: B2PLYP=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-77.819789
Energy at 298.15K-77.821304
HF Energy-77.734598
Nuclear repulsion energy28.386671
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/6-31+G**
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' 3298 3136 0.84      
2 A' 3221 3063 3.39      
3 A' 3113 2961 3.78      
4 A' 1685 1602 2.44      
5 A' 1420 1350 6.20      
6 A' 1077 1025 7.13      
7 A' 736 700 21.27      
8 A" 937 892 96.04      
9 A" 823 782 15.71      

Unscaled Zero Point Vibrational Energy (zpe) 8154.8 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 7755.2 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/6-31+G**
ABC
7.83882 1.08319 0.95169

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.049 0.724 0.000
C2 0.049 -0.589 0.000
H3 -0.680 1.519 0.000
H4 -0.880 -1.161 0.000
H5 0.969 -1.166 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.31261.07942.10102.1011
C21.31262.23061.09131.0854
H31.07942.23062.68693.1507
H42.10101.09132.68691.8492
H52.10111.08543.15071.8492

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.585 C1 C2 H5 122.090
C2 C1 H3 137.458 H4 C2 H5 116.325
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability