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

using model chemistry: B3PW91/6-31+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 B3PW91/6-31+G**
 hartrees
Energy at 0K-2650.914061
Energy at 298.15K 
HF Energy-2650.914061
Nuclear repulsion energy163.545733
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 B3PW91/6-31+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' 3132 3007 20.34      
2 A' 3112 2988 5.82      
3 A' 3050 2929 19.53      
4 A' 1498 1438 3.60      
5 A' 1488 1429 1.44      
6 A' 1414 1358 8.28      
7 A' 1290 1238 60.55      
8 A' 1088 1044 0.11      
9 A' 983 944 18.42      
10 A' 568 545 16.64      
11 A' 289 277 2.22      
12 A" 3185 3058 7.73      
13 A" 3151 3025 6.53      
14 A" 1485 1426 11.71      
15 A" 1270 1219 0.61      
16 A" 1048 1006 0.13      
17 A" 777 746 4.67      
18 A" 260 250 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 14543.4 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 13963.1 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 B3PW91/6-31+G**
ABC
1.01454 0.12504 0.11620

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.571 -2.038 0.000
C2 0.595 -1.074 0.000
Br3 0.000 0.797 0.000
H4 1.218 -1.176 0.889
H5 1.218 -1.176 -0.889
H6 -0.187 -3.066 0.000
H7 -1.197 -1.908 0.887
H8 -1.197 -1.908 -0.887

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51272.89262.17552.17551.09711.09321.0932
C21.51271.96331.09071.09072.14002.16592.1659
Br32.89261.96332.48382.48383.86793.08813.0881
H42.17551.09072.48381.77832.51692.52323.0853
H52.17551.09072.48381.77832.51693.08532.5232
H61.09712.14003.86792.51692.51691.77431.7743
H71.09322.16593.08812.52323.08531.77431.7731
H81.09322.16593.08813.08532.52321.77431.7731

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 111.989 C1 C2 H4 112.352
C1 C2 H5 112.352 C2 C1 H6 109.131
C2 C1 H7 111.412 C2 C1 H8 111.412
Br3 C2 H4 105.228 Br3 C2 H5 105.228
H4 C2 H5 109.215 H6 C1 H7 108.202
H6 C1 H8 108.202 H7 C1 H8 108.376
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.460      
2 C -0.284      
3 Br -0.181      
4 H 0.195      
5 H 0.195      
6 H 0.169      
7 H 0.183      
8 H 0.183      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.492 -2.246 0.000 2.299
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.959 -1.047 0.000
y -1.047 -29.962 0.000
z 0.000 0.000 -32.323
Traceless
 xyz
x -0.816 -1.047 0.000
y -1.047 2.179 0.000
z 0.000 0.000 -1.363
Polar
3z2-r2-2.726
x2-y2-1.997
xy-1.047
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.708 -0.179 0.000
y -0.179 8.195 0.000
z 0.000 0.000 5.426


<r2> (average value of r2) Å2
<r2> 106.262
(<r2>)1/2 10.308