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 C2H5Br (Ethyl bromide)

using model chemistry: HSEh1PBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HSEh1PBE/6-31G**
 hartrees
Energy at 0K-2650.487610
Energy at 298.15K 
HF Energy-2650.487610
Nuclear repulsion energy164.135672
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 HSEh1PBE/6-31G**
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' 3152 3008 17.91 71.68 0.66 0.80
2 A' 3128 2985 7.22 110.58 0.16 0.27
3 A' 3067 2927 16.71 148.09 0.06 0.11
4 A' 1509 1440 2.70 12.24 0.74 0.85
5 A' 1496 1428 0.97 11.70 0.74 0.85
6 A' 1419 1355 6.56 7.02 0.68 0.81
7 A' 1285 1227 54.65 3.12 0.64 0.78
8 A' 1097 1047 0.14 4.34 0.46 0.63
9 A' 988 943 16.06 3.94 0.70 0.83
10 A' 582 555 14.93 17.42 0.26 0.41
11 A' 289 276 2.42 2.19 0.40 0.57
12 A" 3203 3056 9.42 26.63 0.75 0.86
13 A" 3169 3024 5.30 86.24 0.75 0.86
14 A" 1494 1425 9.39 18.28 0.75 0.86
15 A" 1273 1215 0.57 5.13 0.75 0.86
16 A" 1039 991 0.02 5.66 0.75 0.86
17 A" 773 738 4.99 0.31 0.75 0.86
18 A" 264 252 0.01 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14613.1 cm-1
Scaled (by 0.9543) Zero Point Vibrational Energy (zpe) 13945.3 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 HSEh1PBE/6-31G**
ABC
1.00578 0.12663 0.11744

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.573 -2.023 0.000
C2 0.600 -1.072 0.000
Br3 0.000 0.792 0.000
H4 1.222 -1.175 0.889
H5 1.222 -1.175 -0.889
H6 -0.209 -3.057 0.000
H7 -1.197 -1.878 0.885
H8 -1.197 -1.878 -0.885

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51002.87302.17562.17561.09611.09261.0926
C21.51001.95881.09011.09012.14282.15902.1590
Br32.87301.95882.48062.48063.85463.05703.0570
H42.17561.09012.48061.77842.52582.51913.0813
H52.17561.09012.48061.77842.52583.08132.5191
H61.09612.14283.85462.52582.52581.77481.7748
H71.09262.15903.05702.51913.08131.77481.7705
H81.09262.15903.05703.08132.51911.77481.7705

picture of Ethyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br3 111.180 C1 C2 H4 112.598
C1 C2 H5 112.598 C2 C1 H6 109.596
C2 C1 H7 111.091 C2 C1 H8 111.091
Br3 C2 H4 105.324 Br3 C2 H5 105.324
H4 C2 H5 109.322 H6 C1 H7 108.366
H6 C1 H8 108.366 H7 C1 H8 108.245
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.389      
2 C -0.268      
3 Br -0.151      
4 H 0.178      
5 H 0.178      
6 H 0.140      
7 H 0.156      
8 H 0.156      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.460 -2.092 0.000 2.142
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.367 -0.987 0.000
y -0.987 -29.508 0.000
z 0.000 0.000 -31.764
Traceless
 xyz
x -0.731 -0.987 0.000
y -0.987 2.057 0.000
z 0.000 0.000 -1.326
Polar
3z2-r2-2.652
x2-y2-1.859
xy-0.987
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.921 -0.224 0.000
y -0.224 7.414 0.000
z 0.000 0.000 4.657


<r2> (average value of r2) Å2
<r2> 105.042
(<r2>)1/2 10.249