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: CCD/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 CCD/3-21G
 hartrees
Energy at 0K-2637.319655
Energy at 298.15K-2637.325225
HF Energy-2637.075577
Nuclear repulsion energy141.232932
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 CCD/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' 3240 3150 8.53      
2 A' 3222 3133 0.85      
3 A' 3149 3062 1.42      
4 A' 1679 1633 26.92      
5 A' 1489 1447 10.77      
6 A' 1327 1290 29.98      
7 A' 1081 1051 4.59      
8 A' 591 575 11.33      
9 A' 348 339 0.10      
10 A" 1017 989 42.66      
11 A" 992 964 35.60      
12 A" 613 596 14.72      

Unscaled Zero Point Vibrational Energy (zpe) 9374.3 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 9114.7 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 CCD/3-21G
ABC
1.81391 0.13105 0.12222

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.463 -1.153 0.000
C2 -0.444 -2.129 0.000
Br3 0.000 0.746 0.000
H4 1.533 -1.327 0.000
H5 -0.135 -3.173 0.000
H6 -1.512 -1.928 0.000

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6
C11.33201.95431.08422.10662.1212
C21.33202.90882.13291.08891.0870
Br31.95432.90882.57823.92123.0715
H41.08422.13292.57822.48753.1034
H52.10661.08893.92122.48751.8567
H62.12121.08703.07153.10341.8567

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 120.636 C1 C2 H6 122.216
C2 C1 Br3 123.427 C2 C1 H4 123.626
Br3 C1 H4 112.947 H5 C2 H6 117.148
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability