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/TZVP

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/TZVP
 hartrees
Energy at 0K-2652.994692
Energy at 298.15K 
HF Energy-2652.994692
Nuclear repulsion energy163.925081
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/TZVP
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' 3129 3005 22.68 67.97 0.46 0.63
2 A' 3114 2990 2.66 138.39 0.20 0.33
3 A' 3050 2929 16.97 194.36 0.06 0.11
4 A' 1497 1437 3.42 7.14 0.75 0.86
5 A' 1486 1427 1.65 10.29 0.75 0.85
6 A' 1414 1357 7.45 4.24 0.67 0.80
7 A' 1286 1235 57.77 5.33 0.65 0.79
8 A' 1092 1049 0.08 4.13 0.39 0.56
9 A' 985 946 17.75 5.09 0.70 0.82
10 A' 577 554 16.09 18.96 0.30 0.46
11 A' 287 276 2.26 2.13 0.50 0.67
12 A" 3184 3057 7.76 30.53 0.75 0.86
13 A" 3146 3020 6.45 86.91 0.75 0.86
14 A" 1481 1422 11.25 11.02 0.75 0.86
15 A" 1269 1218 0.84 3.53 0.75 0.86
16 A" 1039 998 0.15 4.43 0.75 0.86
17 A" 777 746 4.63 0.16 0.75 0.86
18 A" 265 254 0.01 0.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14538.5 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 13958.4 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/TZVP
ABC
1.01562 0.12584 0.11688

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.570 -2.029 0.000
C2 0.595 -1.075 0.000
Br3 0.000 0.795 0.000
H4 1.216 -1.177 0.887
H5 1.216 -1.177 -0.887
H6 -0.195 -3.058 0.000
H7 -1.194 -1.894 0.884
H8 -1.194 -1.894 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.50622.88132.16912.16911.09471.09071.0907
C21.50621.96261.08771.08772.13442.15752.1575
Br32.88131.96262.48122.48123.85773.07243.0724
H42.16911.08772.48121.77402.51312.51503.0762
H52.16911.08772.48121.77402.51313.07622.5150
H61.09472.13443.85772.51312.51311.77041.7704
H71.09072.15753.07242.51503.07621.77041.7687
H81.09072.15753.07243.07622.51501.77041.7687

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 111.652 C1 C2 H4 112.485
C1 C2 H5 112.485 C2 C1 H6 109.272
C2 C1 H7 111.354 C2 C1 H8 111.354
Br3 C2 H4 105.228 Br3 C2 H5 105.228
H4 C2 H5 109.271 H6 C1 H7 108.208
H6 C1 H8 108.208 H7 C1 H8 108.342
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.357      
2 C -0.187      
3 Br -0.163      
4 H 0.153      
5 H 0.153      
6 H 0.125      
7 H 0.138      
8 H 0.138      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.485 -2.177 0.000 2.231
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.959 -1.043 0.000
y -1.043 -30.033 0.000
z 0.000 0.000 -32.253
Traceless
 xyz
x -0.816 -1.043 0.000
y -1.043 2.073 0.000
z 0.000 0.000 -1.257
Polar
3z2-r2-2.513
x2-y2-1.926
xy-1.043
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.267 -0.264 0.000
y -0.264 8.230 0.000
z 0.000 0.000 4.903


<r2> (average value of r2) Å2
<r2> 105.749
(<r2>)1/2 10.283