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

using model chemistry: B3PW91/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G(2df,p)
 hartrees
Energy at 0K-2651.067731
Energy at 298.15K 
HF Energy-2651.067731
Nuclear repulsion energy165.080026
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 B3PW91/6-31G(2df,p)
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' 3127 3006 17.85 69.72 0.68 0.81
2 A' 3098 2978 7.77 99.46 0.13 0.23
3 A' 3045 2928 17.74 139.22 0.06 0.12
4 A' 1492 1434 2.01 8.45 0.74 0.85
5 A' 1478 1421 1.01 10.78 0.75 0.86
6 A' 1403 1349 4.44 4.62 0.66 0.80
7 A' 1274 1225 44.05 2.71 0.41 0.58
8 A' 1083 1041 0.12 3.68 0.31 0.47
9 A' 981 943 14.38 2.80 0.70 0.82
10 A' 595 572 12.00 15.80 0.20 0.34
11 A' 289 278 1.77 1.96 0.32 0.49
12 A" 3168 3045 11.27 14.09 0.75 0.86
13 A" 3140 3019 3.12 89.51 0.75 0.86
14 A" 1478 1421 8.31 15.08 0.75 0.86
15 A" 1262 1213 0.36 3.57 0.75 0.86
16 A" 1036 996 0.02 3.42 0.75 0.86
17 A" 771 741 4.14 0.07 0.75 0.86
18 A" 261 251 0.03 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14490.0 cm-1
Scaled (by 0.9614) Zero Point Vibrational Energy (zpe) 13930.7 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 B3PW91/6-31G(2df,p)
ABC
1.01006 0.12822 0.11885

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.572 -2.014 0.000
C2 0.598 -1.054 0.000
Br3 0.000 0.787 0.000
H4 1.223 -1.168 0.886
H5 1.223 -1.168 -0.886
H6 -0.201 -3.046 0.000
H7 -1.197 -1.874 0.886
H8 -1.197 -1.874 -0.886

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51382.85922.17362.17361.09651.09311.0931
C21.51381.93521.09081.09082.14672.16312.1631
Br32.85921.93522.47062.47063.83843.04933.0493
H42.17361.09082.47061.77292.51802.52103.0815
H52.17361.09082.47061.77292.51803.08152.5210
H61.09652.14673.83842.51802.51801.77511.7751
H71.09312.16313.04932.52103.08151.77511.7712
H81.09312.16313.04933.08152.52101.77511.7712

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 111.407 C1 C2 H4 112.105
C1 C2 H5 112.105 C2 C1 H6 109.613
C2 C1 H7 111.122 C2 C1 H8 111.122
Br3 C2 H4 106.074 Br3 C2 H5 106.074
H4 C2 H5 108.716 H6 C1 H7 108.332
H6 C1 H8 108.332 H7 C1 H8 108.232
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.424      
2 C -0.347      
3 Br -0.056      
4 H 0.177      
5 H 0.177      
6 H 0.146      
7 H 0.163      
8 H 0.163      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.439 -2.016 0.000 2.063
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.221 -0.954 0.000
y -0.954 -29.602 0.000
z 0.000 0.000 -31.532
Traceless
 xyz
x -0.654 -0.954 0.000
y -0.954 1.775 0.000
z 0.000 0.000 -1.120
Polar
3z2-r2-2.241
x2-y2-1.619
xy-0.954
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.619 -0.127 0.000
y -0.127 7.892 0.000
z 0.000 0.000 5.327


<r2> (average value of r2) Å2
<r2> 104.091
(<r2>)1/2 10.202