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

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-2651.071451
Energy at 298.15K 
HF Energy-2651.071451
Nuclear repulsion energy163.995626
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 mPW1PW91/6-31G*
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' 3160 2997 21.91      
2 A' 3143 2980 4.79      
3 A' 3079 2919 17.96      
4 A' 1531 1452 2.99      
5 A' 1517 1439 1.08      
6 A' 1440 1366 6.62      
7 A' 1300 1232 57.55      
8 A' 1103 1046 0.21      
9 A' 994 943 15.85      
10 A' 578 548 15.72      
11 A' 290 275 2.37      
12 A" 3216 3049 9.83      
13 A" 3178 3014 6.32      
14 A" 1517 1439 9.79      
15 A" 1285 1219 0.57      
16 A" 1048 994 0.05      
17 A" 778 738 5.09      
18 A" 263 250 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14709.4 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 13948.9 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 mPW1PW91/6-31G*
ABC
1.00590 0.12632 0.11718

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.574 -2.026 0.000
C2 0.600 -1.073 0.000
Br3 0.000 0.793 0.000
H4 1.221 -1.176 0.889
H5 1.221 -1.176 -0.889
H6 -0.207 -3.058 0.000
H7 -1.197 -1.882 0.886
H8 -1.197 -1.882 -0.886

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51162.87682.17542.17541.09611.09231.0923
C21.51161.96061.08921.08922.14302.16012.1601
Br32.87681.96062.48192.48193.85743.06143.0614
H42.17541.08922.48191.77782.52422.51843.0808
H52.17541.08922.48191.77782.52423.08082.5184
H61.09612.14303.85742.52422.52421.77461.7746
H71.09232.16013.06142.51843.08081.77461.7712
H81.09232.16013.06143.08082.51841.77461.7712

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 111.239 C1 C2 H4 112.523
C1 C2 H5 112.523 C2 C1 H6 109.499
C2 C1 H7 111.085 C2 C1 H8 111.085
Br3 C2 H4 105.339 Br3 C2 H5 105.339
H4 C2 H5 109.398 H6 C1 H7 108.373
H6 C1 H8 108.373 H7 C1 H8 108.343
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.518      
2 C -0.352      
3 Br -0.146      
4 H 0.218      
5 H 0.218      
6 H 0.183      
7 H 0.198      
8 H 0.198      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.470 -2.113 0.000 2.165
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.315 -1.019 0.000
y -1.019 -29.440 0.000
z 0.000 0.000 -31.678
Traceless
 xyz
x -0.756 -1.019 0.000
y -1.019 2.056 0.000
z 0.000 0.000 -1.300
Polar
3z2-r2-2.601
x2-y2-1.875
xy-1.019
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.848 -0.232 0.000
y -0.232 7.336 0.000
z 0.000 0.000 4.594


<r2> (average value of r2) Å2
<r2> 105.177
(<r2>)1/2 10.256