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

using model chemistry: B1B95/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31+G**
 hartrees
Energy at 0K-2651.226704
Energy at 298.15K 
HF Energy-2651.226704
Nuclear repulsion energy164.174324
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 B1B95/6-31+G**
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' 3142 3005 19.44      
2 A' 3120 2984 6.58      
3 A' 3060 2927 19.33      
4 A' 1497 1432 3.50      
5 A' 1487 1423 1.32      
6 A' 1412 1351 7.95      
7 A' 1288 1232 60.04      
8 A' 1090 1043 0.06      
9 A' 984 942 17.41      
10 A' 574 549 16.40      
11 A' 287 275 2.10      
12 A" 3192 3053 7.76      
13 A" 3159 3022 6.27      
14 A" 1484 1420 11.67      
15 A" 1268 1213 0.55      
16 A" 1047 1001 0.15      
17 A" 775 741 4.37      
18 A" 262 250 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 14563.8 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 13931.8 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 B1B95/6-31+G**
ABC
1.01718 0.12620 0.11721

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.570 -2.029 0.000
C2 0.594 -1.068 0.000
Br3 0.000 0.794 0.000
H4 1.217 -1.172 0.887
H5 1.217 -1.172 -0.887
H6 -0.190 -3.056 0.000
H7 -1.195 -1.896 0.885
H8 -1.195 -1.896 -0.885

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.50952.87962.17102.17101.09501.09141.0914
C21.50951.95421.08891.08892.13682.16062.1606
Br32.87961.95422.47612.47613.85423.07313.0731
H42.17101.08892.47611.77492.51282.51743.0788
H52.17101.08892.47611.77492.51283.07882.5174
H61.09502.13683.85422.51282.51281.77161.7716
H71.09142.16063.07312.51743.07881.77161.7700
H81.09142.16063.07313.07882.51741.77161.7700

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 111.838 C1 C2 H4 112.332
C1 C2 H5 112.332 C2 C1 H6 109.223
C2 C1 H7 111.329 C2 C1 H8 111.329
Br3 C2 H4 105.350 Br3 C2 H5 105.350
H4 C2 H5 109.178 H6 C1 H7 108.249
H6 C1 H8 108.249 H7 C1 H8 108.361
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.453      
2 C -0.283      
3 Br -0.171      
4 H 0.192      
5 H 0.192      
6 H 0.165      
7 H 0.179      
8 H 0.179      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.491 -2.206 0.000 2.260
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.001 -1.051 0.000
y -1.051 -30.025 0.000
z 0.000 0.000 -32.353
Traceless
 xyz
x -0.812 -1.051 0.000
y -1.051 2.151 0.000
z 0.000 0.000 -1.340
Polar
3z2-r2-2.679
x2-y2-1.976
xy-1.051
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.721 -0.174 0.000
y -0.174 8.178 0.000
z 0.000 0.000 5.435


<r2> (average value of r2) Å2
<r2> 105.574
(<r2>)1/2 10.275