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

using model chemistry: B3LYP/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-27.676172
Energy at 298.15K 
HF Energy-27.676172
Nuclear repulsion energy40.834041
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 B3LYP/CEP-121G
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' 3080 3001 49.10      
2 A' 3065 2987 3.48      
3 A' 2987 2911 29.07      
4 A' 1522 1483 5.51      
5 A' 1494 1455 1.43      
6 A' 1436 1399 7.95      
7 A' 1283 1250 73.19      
8 A' 1080 1052 0.19      
9 A' 982 957 22.50      
10 A' 523 509 23.98      
11 A' 271 264 3.46      
12 A" 3156 3075 28.31      
13 A" 3104 3025 15.69      
14 A" 1503 1464 10.86      
15 A" 1262 1230 1.87      
16 A" 1031 1004 0.83      
17 A" 780 761 7.29      
18 A" 246 240 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 14401.8 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 14034.5 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 B3LYP/CEP-121G
ABC
0.97476 0.11848 0.11008

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.585 -2.085 0.000
C2 0.614 -1.130 0.000
Br3 0.000 0.821 0.000
H4 1.231 -1.216 0.897
H5 1.231 -1.216 -0.897
H6 -0.219 -3.123 0.000
H7 -1.209 -1.941 0.889
H8 -1.209 -1.941 -0.889

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.53342.96392.20442.20441.10111.09541.0954
C21.53342.04481.09201.09202.16042.18472.1847
Br32.96392.04482.54302.54303.94993.14313.1431
H42.20441.09202.54301.79372.55822.54573.1096
H52.20441.09202.54301.79372.55823.10962.5457
H61.10112.16043.94992.55822.55821.78001.7800
H71.09542.18473.14312.54573.10961.78001.7777
H81.09542.18473.14313.10962.54571.78001.7777

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 111.050 C1 C2 H4 113.134
C1 C2 H5 113.134 C2 C1 H6 109.079
C2 C1 H7 111.326 C2 C1 H8 111.326
Br3 C2 H4 104.172 Br3 C2 H5 104.172
H4 C2 H5 110.440 H6 C1 H7 108.268
H6 C1 H8 108.268 H7 C1 H8 108.477
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.415      
2 C -0.488      
3 Br 0.004      
4 H 0.199      
5 H 0.199      
6 H 0.156      
7 H 0.173      
8 H 0.173      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.562 -2.461 0.000 2.525
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.686 -1.024 0.000
y -1.024 -26.661 0.000
z 0.000 0.000 -29.062
Traceless
 xyz
x -0.825 -1.024 0.000
y -1.024 2.213 0.000
z 0.000 0.000 -1.388
Polar
3z2-r2-2.776
x2-y2-2.026
xy-1.024
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.373 -0.546 0.000
y -0.546 8.326 0.000
z 0.000 0.000 3.849


<r2> (average value of r2) Å2
<r2> 77.097
(<r2>)1/2 8.780