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 C2H3Br (vinyl bromide)

using model chemistry: B3LYP/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/CEP-31G
 hartrees
Energy at 0K-26.423712
Energy at 298.15K-26.429180
Nuclear repulsion energy31.800881
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 B3LYP/CEP-31G
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' 3265 3162 16.21      
2 A' 3235 3132 8.83      
3 A' 3155 3056 2.16      
4 A' 1650 1597 52.09      
5 A' 1403 1359 9.96      
6 A' 1262 1222 41.39      
7 A' 1009 977 17.83      
8 A' 567 549 30.27      
9 A' 330 320 0.33      
10 A" 969 938 143.62      
11 A" 933 903 1.85      
12 A" 585 567 26.06      

Unscaled Zero Point Vibrational Energy (zpe) 9181.6 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 8891.5 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 B3LYP/CEP-31G
ABC
1.72971 0.12963 0.12059

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.477 -1.155 0.000
C2 -0.460 -2.144 0.000
Br3 0.000 0.749 0.000
H4 1.558 -1.302 0.000
H5 -0.127 -3.189 0.000
H6 -1.534 -1.943 0.000

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6
C11.36271.96361.09102.12172.1598
C21.36272.93032.18741.09671.0921
Br31.96362.93032.57593.94073.0991
H41.09102.18742.57592.53033.1579
H52.12171.09673.94072.53031.8792
H62.15981.09213.09913.15791.8792

picture of vinyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 118.839 C1 C2 H6 122.856
C2 C1 Br3 122.478 C2 C1 H4 125.752
Br3 C1 H4 111.769 H5 C2 H6 118.305
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.417      
2 C -0.290      
3 Br 0.008      
4 H 0.271      
5 H 0.182      
6 H 0.245      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.259 -1.856 0.000 1.874
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.351 -0.519 0.000
y -0.519 -23.170 0.000
z 0.000 0.000 -30.038
Traceless
 xyz
x 1.253 -0.519 0.000
y -0.519 4.524 0.000
z 0.000 0.000 -5.778
Polar
3z2-r2-11.556
x2-y2-2.181
xy-0.519
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.136 0.616 0.000
y 0.616 8.670 0.000
z 0.000 0.000 1.853


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000