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

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-2648.539207
Energy at 298.15K 
HF Energy-2648.539207
Nuclear repulsion energy163.934946
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 HF/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' 3303 2967 33.12      
2 A' 3277 2944 10.50      
3 A' 3209 2884 28.56      
4 A' 1642 1475 1.40      
5 A' 1637 1471 1.33      
6 A' 1565 1406 2.44      
7 A' 1414 1271 83.79      
8 A' 1172 1053 0.81      
9 A' 1048 941 12.36      
10 A' 600 539 31.09      
11 A' 310 278 2.68      
12 A" 3368 3026 12.07      
13 A" 3302 2967 15.97      
14 A" 1632 1466 6.58      
15 A" 1386 1245 0.31      
16 A" 1133 1018 0.26      
17 A" 834 749 2.86      
18 A" 277 249 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 15554.2 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 13975.5 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 HF/6-31G*
ABC
1.00996 0.12587 0.11676

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.575 -2.031 0.000
C2 0.602 -1.075 0.000
Br3 0.000 0.795 0.000
H4 1.215 -1.176 0.881
H5 1.215 -1.176 -0.881
H6 -0.207 -3.054 0.000
H7 -1.192 -1.889 0.879
H8 -1.192 -1.889 -0.879

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51622.88392.17002.17001.08681.08291.0829
C21.51621.96451.07741.07742.13722.15692.1569
Br32.88391.96452.47702.47703.85403.06543.0654
H42.17001.07742.47701.76102.51402.50993.0650
H52.17001.07742.47701.76102.51403.06502.5099
H61.08682.13723.85402.51402.51401.76031.7603
H71.08292.15693.06542.50993.06501.76031.7572
H81.08292.15693.06543.06502.50991.76031.7572

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 111.242 C1 C2 H4 112.479
C1 C2 H5 112.479 C2 C1 H6 109.269
C2 C1 H7 111.073 C2 C1 H8 111.073
Br3 C2 H4 105.272 Br3 C2 H5 105.272
H4 C2 H5 109.616 H6 C1 H7 108.446
H6 C1 H8 108.446 H7 C1 H8 108.458
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.482      
2 C -0.307      
3 Br -0.192      
4 H 0.216      
5 H 0.216      
6 H 0.172      
7 H 0.188      
8 H 0.188      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.554 -2.353 0.000 2.417
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.816 -1.125 0.003
y -1.125 -30.059 -0.011
z 0.003 -0.011 -32.204
Traceless
 xyz
x -0.685 -1.125 0.003
y -1.125 1.952 -0.011
z 0.003 -0.011 -1.267
Polar
3z2-r2-2.534
x2-y2-1.757
xy-1.125
xz0.003
yz-0.011


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.706 -0.344 -0.014
y -0.344 7.217 0.006
z -0.014 0.006 4.490


<r2> (average value of r2) Å2
<r2> 105.705
(<r2>)1/2 10.281