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: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-2651.052517
Energy at 298.15K 
HF Energy-2651.052517
Nuclear repulsion energy162.590674
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 B1B95/6-31G
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' 3168 3021 26.38 63.27 0.28 0.44
2 A' 3154 3008 0.87 135.10 0.31 0.47
3 A' 3077 2935 17.10 153.84 0.06 0.12
4 A' 1546 1474 6.30 17.73 0.73 0.85
5 A' 1528 1457 3.37 14.91 0.75 0.85
6 A' 1470 1402 10.96 8.12 0.67 0.80
7 A' 1310 1249 52.17 5.77 0.64 0.78
8 A' 1117 1065 0.55 7.51 0.62 0.76
9 A' 1020 972 20.90 5.33 0.73 0.84
10 A' 553 527 19.25 22.13 0.32 0.49
11 A' 288 275 3.21 3.50 0.55 0.71
12 A" 3239 3089 10.74 39.93 0.75 0.86
13 A" 3185 3038 9.08 80.66 0.75 0.86
14 A" 1533 1462 12.32 22.01 0.75 0.86
15 A" 1299 1239 1.13 8.06 0.75 0.86
16 A" 1052 1003 0.02 11.32 0.75 0.86
17 A" 796 759 7.62 1.54 0.75 0.86
18 A" 263 251 0.00 0.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14798.7 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 14113.5 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 B1B95/6-31G
ABC
0.98231 0.12470 0.11547

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.581 -2.027 0.000
C2 0.613 -1.106 0.000
Br3 0.000 0.800 0.000
H4 1.228 -1.200 0.892
H5 1.228 -1.200 -0.892
H6 -0.246 -3.069 0.000
H7 -1.201 -1.867 0.884
H8 -1.201 -1.867 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.50812.88562.17932.17931.09471.09101.0910
C21.50812.00181.08691.08692.14282.15632.1563
Br32.88562.00182.51052.51053.87653.05503.0550
H42.17931.08692.51051.78312.54132.51813.0809
H52.17931.08692.51051.78312.54133.08092.5181
H61.09472.14283.87652.54132.54131.77121.7712
H71.09102.15633.05502.51813.08091.77121.7673
H81.09102.15633.05503.08092.51811.77121.7673

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 109.799 C1 C2 H4 113.243
C1 C2 H5 113.243 C2 C1 H6 109.809
C2 C1 H7 111.109 C2 C1 H8 111.109
Br3 C2 H4 104.827 Br3 C2 H5 104.827
H4 C2 H5 110.223 H6 C1 H7 108.266
H6 C1 H8 108.266 H7 C1 H8 108.185
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.442      
2 C -0.531      
3 Br -0.017      
4 H 0.225      
5 H 0.225      
6 H 0.171      
7 H 0.185      
8 H 0.185      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.521 -2.336 0.000 2.394
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.448 -0.880 0.000
y -0.880 -29.868 0.000
z 0.000 0.000 -31.875
Traceless
 xyz
x -0.577 -0.880 0.000
y -0.880 1.793 0.000
z 0.000 0.000 -1.216
Polar
3z2-r2-2.433
x2-y2-1.580
xy-0.880
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.891 -0.523 0.000
y -0.523 7.126 0.000
z 0.000 0.000 3.550


<r2> (average value of r2) Å2
<r2> 106.434
(<r2>)1/2 10.317