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: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-2637.291198
Energy at 298.15K-2637.296914
Nuclear repulsion energy144.781028
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 HF/3-21G*
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' 3422 3089 6.47      
2 A' 3404 3073 2.64      
3 A' 3330 3006 0.77      
4 A' 1816 1639 32.19      
5 A' 1571 1418 11.55      
6 A' 1429 1290 34.88      
7 A' 1157 1044 8.23      
8 A' 656 592 23.20      
9 A' 379 343 0.09      
10 A" 1135 1024 19.95      
11 A" 1109 1001 77.13      
12 A" 668 603 17.13      

Unscaled Zero Point Vibrational Energy (zpe) 10038.4 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 9060.6 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 HF/3-21G*
ABC
1.85835 0.13838 0.12879

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.458 -1.118 0.000
C2 -0.439 -2.073 0.000
Br3 0.000 0.726 0.000
H4 1.513 -1.284 0.000
H5 -0.133 -3.101 0.000
H6 -1.491 -1.871 0.000

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6
C11.30991.89991.06862.06932.0892
C21.30992.83282.10591.07311.0711
Br31.89992.83282.51583.82942.9945
H41.06862.10592.51582.45243.0613
H52.06931.07313.82942.45241.8323
H62.08921.07112.99453.06131.8323

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 120.218 C1 C2 H6 122.358
C2 C1 Br3 122.845 C2 C1 H4 124.290
Br3 C1 H4 112.865 H5 C2 H6 117.423
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.267      
2 C -0.420      
3 Br -0.063      
4 H 0.270      
5 H 0.235      
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
  0.213 -1.607 0.000 1.621
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.843 -0.461 0.000
y -0.461 -26.478 0.000
z 0.000 0.000 -33.107
Traceless
 xyz
x 0.949 -0.461 0.000
y -0.461 4.497 0.000
z 0.000 0.000 -5.447
Polar
3z2-r2-10.893
x2-y2-2.365
xy-0.461
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.503 0.699 0.000
y 0.699 7.727 0.000
z 0.000 0.000 2.211


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