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: B2PLYP/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/Def2TZVPP
 hartrees
Energy at 0K-2652.950369
Energy at 298.15K 
HF Energy-2652.745681
Nuclear repulsion energy163.919262
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 B2PLYP/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3131 3131 24.36 62.64 0.40 0.57
2 A' 3116 3116 1.94 128.83 0.20 0.33
3 A' 3056 3056 18.18 185.12 0.06 0.10
4 A' 1512 1512 2.18 4.76 0.75 0.85
5 A' 1500 1500 1.23 7.94 0.74 0.85
6 A' 1425 1425 4.26 1.42 0.74 0.85
7 A' 1290 1290 50.91 4.77 0.50 0.67
8 A' 1088 1088 0.07 4.23 0.20 0.33
9 A' 984 984 14.72 3.74 0.74 0.85
10 A' 577 577 14.81 18.72 0.24 0.39
11 A' 288 288 1.81 2.48 0.37 0.54
12 A" 3184 3184 8.27 28.66 0.75 0.86
13 A" 3146 3146 7.06 74.71 0.75 0.86
14 A" 1498 1498 9.32 7.86 0.75 0.86
15 A" 1278 1278 0.31 1.86 0.75 0.86
16 A" 1044 1044 0.16 2.50 0.75 0.86
17 A" 780 780 3.38 0.03 0.75 0.86
18 A" 261 261 0.01 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14578.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14578.4 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 B2PLYP/Def2TZVPP
ABC
1.01293 0.12582 0.11680

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.573 -2.031 0.000
C2 0.598 -1.074 0.000
Br3 0.000 0.795 0.000
H4 1.216 -1.176 0.885
H5 1.216 -1.176 -0.885
H6 -0.199 -3.057 0.000
H7 -1.193 -1.892 0.882
H8 -1.193 -1.892 -0.882

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51182.88342.17112.17111.09131.08751.0875
C21.51181.96261.08421.08422.13662.15752.1575
Br32.88341.96262.47942.47943.85673.06943.0694
H42.17111.08422.47941.76962.51452.51353.0724
H52.17111.08422.47941.76962.51453.07242.5135
H61.09132.13663.85672.51452.51451.76691.7669
H71.08752.15753.06942.51353.07241.76691.7643
H81.08752.15753.06943.07242.51351.76691.7643

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 111.523 C1 C2 H4 112.460
C1 C2 H5 112.460 C2 C1 H6 109.265
C2 C1 H7 111.155 C2 C1 H8 111.155
Br3 C2 H4 105.264 Br3 C2 H5 105.264
H4 C2 H5 109.387 H6 C1 H7 108.382
H6 C1 H8 108.382 H7 C1 H8 108.418
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.230      
2 C -0.136      
3 Br -0.150      
4 H 0.123      
5 H 0.123      
6 H 0.083      
7 H 0.093      
8 H 0.093      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.466 -2.106 0.000 2.157
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.180 -0.999 0.002
y -0.999 -30.414 0.021
z 0.002 0.021 -32.427
Traceless
 xyz
x -0.760 -0.999 0.002
y -0.999 1.890 0.021
z 0.002 0.021 -1.130
Polar
3z2-r2-2.260
x2-y2-1.766
xy-0.999
xz0.002
yz0.021


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.890 -0.159 -0.000
y -0.159 8.562 -0.001
z -0.000 -0.001 5.501


<r2> (average value of r2) Å2
<r2> 105.925
(<r2>)1/2 10.292