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

using model chemistry: mPW1PW91/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/Def2TZVPP
 hartrees
Energy at 0K-2653.586351
Energy at 298.15K 
HF Energy-2653.586351
Nuclear repulsion energy164.468099
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 mPW1PW91/Def2TZVPP
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 3132 20.54 66.67 0.50 0.67
2 A' 3115 3115 3.46 126.89 0.16 0.27
3 A' 3055 3055 16.84 188.62 0.05 0.10
4 A' 1499 1499 2.67 4.90 0.75 0.85
5 A' 1488 1488 1.61 7.33 0.75 0.85
6 A' 1413 1413 6.02 1.96 0.72 0.83
7 A' 1282 1282 47.65 4.70 0.49 0.66
8 A' 1090 1090 0.11 3.85 0.22 0.36
9 A' 985 985 16.54 3.41 0.69 0.82
10 A' 586 586 14.17 17.69 0.24 0.38
11 A' 287 287 1.95 2.29 0.38 0.55
12 A" 3183 3183 7.57 25.44 0.75 0.86
13 A" 3147 3147 5.90 77.89 0.75 0.86
14 A" 1484 1484 10.37 7.76 0.75 0.86
15 A" 1269 1269 0.40 1.79 0.75 0.86
16 A" 1040 1040 0.07 2.38 0.75 0.86
17 A" 774 774 4.25 0.02 0.75 0.86
18 A" 258 258 0.01 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14542.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14542.5 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 mPW1PW91/Def2TZVPP
ABC
1.01850 0.12674 0.11767

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.570 -2.024 0.000
C2 0.595 -1.068 0.000
Br3 0.000 0.792 0.000
H4 1.215 -1.170 0.885
H5 1.215 -1.170 -0.885
H6 -0.195 -3.050 0.000
H7 -1.192 -1.888 0.883
H8 -1.192 -1.888 -0.883

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.50702.87322.16802.16801.09241.08871.0887
C21.50701.95241.08581.08582.13372.15532.1553
Br32.87321.95242.47162.47163.84693.06313.0631
H42.16801.08582.47161.77002.51122.51243.0720
H52.16801.08582.47161.77002.51123.07202.5124
H61.09242.13373.84692.51122.51121.76781.7678
H71.08872.15533.06312.51243.07201.76781.7655
H81.08872.15533.06313.07202.51241.76781.7655

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 111.663 C1 C2 H4 112.457
C1 C2 H5 112.457 C2 C1 H6 109.305
C2 C1 H7 111.248 C2 C1 H8 111.248
Br3 C2 H4 105.293 Br3 C2 H5 105.293
H4 C2 H5 109.195 H6 C1 H7 108.293
H6 C1 H8 108.293 H7 C1 H8 108.360
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.221      
2 C -0.124      
3 Br -0.161      
4 H 0.121      
5 H 0.121      
6 H 0.079      
7 H 0.092      
8 H 0.092      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.462 -2.122 0.000 2.171
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.782 -0.972 0.000
y -0.972 -29.998 0.000
z 0.000 0.000 -32.050
Traceless
 xyz
x -0.758 -0.972 0.000
y -0.972 1.918 0.000
z 0.000 0.000 -1.160
Polar
3z2-r2-2.320
x2-y2-1.784
xy-0.972
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.913 -0.132 0.000
y -0.132 8.550 0.000
z 0.000 0.000 5.523


<r2> (average value of r2) Å2
<r2> 105.108
(<r2>)1/2 10.252