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

using model chemistry: PBEPBE/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 PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-2650.580312
Energy at 298.15K 
HF Energy-2650.580312
Nuclear repulsion energy164.158783
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 PBEPBE/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' 3057 3026 15.94 72.80 0.69 0.82
2 A' 3024 2993 8.30 100.10 0.12 0.21
3 A' 2977 2946 16.99 151.43 0.07 0.13
4 A' 1449 1434 1.84 8.85 0.74 0.85
5 A' 1432 1417 0.67 11.65 0.74 0.85
6 A' 1356 1342 3.97 6.03 0.63 0.77
7 A' 1229 1216 43.65 3.09 0.46 0.63
8 A' 1054 1043 0.16 3.46 0.37 0.54
9 A' 952 943 14.99 2.76 0.64 0.78
10 A' 574 568 11.28 14.86 0.20 0.33
11 A' 280 277 1.89 2.05 0.33 0.50
12 A" 3094 3062 12.53 8.38 0.75 0.86
13 A" 3069 3037 1.51 95.94 0.75 0.86
14 A" 1433 1418 7.79 15.72 0.75 0.86
15 A" 1223 1210 0.42 3.59 0.75 0.86
16 A" 1001 990 0.02 4.05 0.75 0.86
17 A" 750 742 4.10 0.08 0.75 0.86
18 A" 256 253 0.02 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14104.0 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 13958.7 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 PBEPBE/6-31G(2df,p)
ABC
0.99743 0.12692 0.11764

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.576 -2.023 0.000
C2 0.601 -1.062 0.000
Br3 0.000 0.791 0.000
H4 1.231 -1.175 0.893
H5 1.231 -1.175 -0.893
H6 -0.205 -3.063 0.000
H7 -1.205 -1.880 0.891
H8 -1.205 -1.880 -0.891

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51922.87232.18602.18601.10411.10051.1005
C21.51921.94801.09871.09872.15702.17362.1736
Br32.87231.94802.48562.48563.85933.06283.0628
H42.18601.09872.48561.78652.53392.53523.1004
H52.18601.09872.48561.78652.53393.10042.5352
H61.10412.15703.85932.53392.53391.78731.7873
H71.10052.17363.06282.53523.10041.78731.7830
H81.10052.17363.06283.10042.53521.78731.7830

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 111.276 C1 C2 H4 112.243
C1 C2 H5 112.243 C2 C1 H6 109.610
C2 C1 H7 111.134 C2 C1 H8 111.134
Br3 C2 H4 105.955 Br3 C2 H5 105.955
H4 C2 H5 108.783 H6 C1 H7 108.333
H6 C1 H8 108.333 H7 C1 H8 108.206
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.388      
2 C -0.319      
3 Br -0.048      
4 H 0.161      
5 H 0.161      
6 H 0.133      
7 H 0.150      
8 H 0.150      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.417 -1.972 0.000 2.015
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.337 -0.926 0.000
y -0.926 -29.696 0.000
z 0.000 0.000 -31.646
Traceless
 xyz
x -0.666 -0.926 0.000
y -0.926 1.796 0.000
z 0.000 0.000 -1.130
Polar
3z2-r2-2.260
x2-y2-1.641
xy-0.926
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.716 -0.096 0.000
y -0.096 8.098 0.000
z 0.000 0.000 5.401


<r2> (average value of r2) Å2
<r2> 105.043
(<r2>)1/2 10.249