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

using model chemistry: mPW1PW91/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-2653.537055
Energy at 298.15K 
HF Energy-2653.537055
Nuclear repulsion energy163.812614
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/aug-cc-pVDZ
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' 3143 3012 18.83 72.29 0.64 0.78
2 A' 3121 2991 6.69 125.50 0.09 0.17
3 A' 3059 2931 18.15 209.06 0.05 0.10
4 A' 1474 1413 2.17 3.69 0.75 0.86
5 A' 1462 1401 1.31 4.15 0.72 0.83
6 A' 1392 1334 6.94 2.01 0.58 0.73
7 A' 1266 1213 49.04 5.72 0.32 0.49
8 A' 1092 1047 0.24 3.93 0.16 0.28
9 A' 980 939 17.09 3.31 0.58 0.73
10 A' 579 555 16.03 19.79 0.18 0.31
11 A' 289 277 2.10 2.60 0.29 0.45
12 A" 3196 3063 7.45 27.16 0.75 0.86
13 A" 3162 3030 6.52 72.67 0.75 0.86
14 A" 1459 1398 10.26 5.33 0.75 0.86
15 A" 1256 1203 0.34 0.81 0.75 0.86
16 A" 1030 987 0.03 1.18 0.75 0.86
17 A" 769 737 3.82 0.01 0.75 0.86
18 A" 259 249 0.01 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14493.9 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 13889.5 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/aug-cc-pVDZ
ABC
1.00896 0.12587 0.11688

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.572 -2.029 0.000
C2 0.597 -1.073 0.000
Br3 0.000 0.795 0.000
H4 1.220 -1.176 0.892
H5 1.220 -1.176 -0.892
H6 -0.192 -3.061 0.000
H7 -1.197 -1.893 0.889
H8 -1.197 -1.893 -0.889

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51012.88152.17642.17641.09951.09561.0956
C21.51011.96111.09331.09332.13862.16342.1634
Br32.88151.96112.48352.48353.86073.07353.0735
H42.17641.09332.48351.78492.51902.52123.0873
H52.17641.09332.48351.78492.51903.08732.5212
H61.09952.13863.86072.51902.51901.77941.7794
H71.09562.16343.07352.52123.08731.77941.7789
H81.09562.16343.07353.08732.52121.77941.7789

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 111.566 C1 C2 H4 112.453
C1 C2 H5 112.453 C2 C1 H6 109.064
C2 C1 H7 111.254 C2 C1 H8 111.254
Br3 C2 H4 105.230 Br3 C2 H5 105.230
H4 C2 H5 109.423 H6 C1 H7 108.318
H6 C1 H8 108.318 H7 C1 H8 108.545
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.456      
2 C -0.155      
3 Br 0.167      
4 H -0.095      
5 H -0.095      
6 H -0.095      
7 H -0.091      
8 H -0.091      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.472 -2.201 0.000 2.251
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.962 -0.994 0.000
y -0.994 -30.054 0.000
z 0.000 0.000 -32.266
Traceless
 xyz
x -0.802 -0.994 0.000
y -0.994 2.060 0.000
z 0.000 0.000 -1.258
Polar
3z2-r2-2.515
x2-y2-1.908
xy-0.994
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.527 -0.064 0.000
y -0.064 9.028 0.000
z 0.000 0.000 6.126


<r2> (average value of r2) Å2
<r2> 105.815
(<r2>)1/2 10.287