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All results from a given calculation for C2H5Br (Ethyl bromide)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-2650.891046
Energy at 298.15K 
HF Energy-2650.891046
Nuclear repulsion energy163.587731
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 B3PW91/6-31G*
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' 3141 3005 23.21      
2 A' 3123 2988 4.52      
3 A' 3060 2927 18.63      
4 A' 1523 1457 2.93      
5 A' 1509 1444 0.99      
6 A' 1432 1370 6.15      
7 A' 1290 1235 57.94      
8 A' 1094 1047 0.21      
9 A' 987 944 16.23      
10 A' 569 545 15.77      
11 A' 287 275 2.45      
12 A" 3196 3057 10.87      
13 A" 3159 3022 6.53      
14 A" 1509 1444 9.52      
15 A" 1277 1222 0.56      
16 A" 1041 996 0.05      
17 A" 775 741 5.13      
18 A" 261 250 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 14616.0 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13983.1 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 B3PW91/6-31G*
ABC
1.00341 0.12560 0.11654

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.574 -2.031 0.000
C2 0.601 -1.077 0.000
Br3 0.000 0.796 0.000
H4 1.222 -1.179 0.890
H5 1.222 -1.179 -0.890
H6 -0.205 -3.065 0.000
H7 -1.199 -1.889 0.887
H8 -1.199 -1.889 -0.887

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51372.88472.17902.17901.09781.09391.0939
C21.51371.96651.09071.09072.14532.16382.1638
Br32.88471.96652.48692.48693.86623.07053.0705
H42.17901.09072.48691.78062.52782.52293.0860
H52.17901.09072.48691.78062.52783.08602.5229
H61.09782.14533.86622.52782.52781.77691.7769
H71.09392.16383.07052.52293.08601.77691.7738
H81.09392.16383.07053.08602.52291.77691.7738

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 111.302 C1 C2 H4 112.567
C1 C2 H5 112.567 C2 C1 H6 109.439
C2 C1 H7 111.142 C2 C1 H8 111.142
Br3 C2 H4 105.241 Br3 C2 H5 105.241
H4 C2 H5 109.425 H6 C1 H7 108.344
H6 C1 H8 108.344 H7 C1 H8 108.343
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.508      
2 C -0.343      
3 Br -0.146      
4 H 0.214      
5 H 0.214      
6 H 0.179      
7 H 0.195      
8 H 0.195      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.467 -2.117 0.000 2.168
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.311 -1.010 0.000
y -1.010 -29.426 0.000
z 0.000 0.000 -31.677
Traceless
 xyz
x -0.759 -1.010 0.000
y -1.010 2.067 0.000
z 0.000 0.000 -1.308
Polar
3z2-r2-2.616
x2-y2-1.884
xy-1.010
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.874 -0.229 0.000
y -0.229 7.396 0.000
z 0.000 0.000 4.618


<r2> (average value of r2) Å2
<r2> 105.624
(<r2>)1/2 10.277