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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G(2df,p)
 hartrees
Energy at 0K-2650.677016
Energy at 298.15K 
HF Energy-2650.677016
Nuclear repulsion energy165.645716
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 PBE1PBE/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' 3143 3008 15.52 71.48 0.68 0.81
2 A' 3110 2976 8.00 96.42 0.12 0.22
3 A' 3059 2927 15.97 134.34 0.05 0.10
4 A' 1493 1429 2.15 8.16 0.74 0.85
5 A' 1480 1417 1.10 10.72 0.75 0.86
6 A' 1405 1344 5.29 4.39 0.67 0.81
7 A' 1278 1224 42.30 2.51 0.41 0.58
8 A' 1092 1045 0.10 3.72 0.30 0.46
9 A' 987 945 13.87 2.80 0.68 0.81
10 A' 609 583 11.22 15.39 0.20 0.34
11 A' 292 279 1.67 1.81 0.32 0.49
12 A" 3181 3044 9.75 12.24 0.75 0.86
13 A" 3154 3019 2.49 89.83 0.75 0.86
14 A" 1480 1416 8.72 14.80 0.75 0.86
15 A" 1266 1211 0.38 3.49 0.75 0.86
16 A" 1040 995 0.02 3.32 0.75 0.86
17 A" 772 739 4.20 0.06 0.75 0.86
18 A" 264 252 0.03 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14552.2 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 13926.4 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 PBE1PBE/6-31G(2df,p)
ABC
1.01163 0.12931 0.11981

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.572 -2.006 0.000
C2 0.597 -1.048 0.000
Br3 0.000 0.783 0.000
H4 1.222 -1.165 0.886
H5 1.222 -1.165 -0.886
H6 -0.203 -3.038 0.000
H7 -1.196 -1.863 0.885
H8 -1.196 -1.863 -0.885

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51132.84752.17072.17071.09601.09301.0930
C21.51131.92611.09091.09092.14512.15992.1599
Br32.84751.92612.46482.46483.82703.03653.0365
H42.17071.09092.46481.77222.51522.51773.0784
H52.17071.09092.46481.77222.51523.07842.5177
H61.09602.14513.82702.51522.51521.77531.7753
H71.09302.15993.03652.51773.07841.77531.7707
H81.09302.15993.03653.07842.51771.77531.7707

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 111.296 C1 C2 H4 112.046
C1 C2 H5 112.046 C2 C1 H6 109.683
C2 C1 H7 111.046 C2 C1 H8 111.046
Br3 C2 H4 106.239 Br3 C2 H5 106.239
H4 C2 H5 108.640 H6 C1 H7 108.390
H6 C1 H8 108.390 H7 C1 H8 108.202
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.430      
2 C -0.354      
3 Br -0.053      
4 H 0.179      
5 H 0.179      
6 H 0.149      
7 H 0.165      
8 H 0.165      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.441 -1.995 0.000 2.043
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.280 -0.962 0.000
y -0.962 -29.678 0.000
z 0.000 0.000 -31.584
Traceless
 xyz
x -0.649 -0.962 0.000
y -0.962 1.754 0.000
z 0.000 0.000 -1.105
Polar
3z2-r2-2.210
x2-y2-1.602
xy-0.962
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.592 -0.127 0.000
y -0.127 7.817 0.000
z 0.000 0.000 5.300


<r2> (average value of r2) Å2
<r2> 103.501
(<r2>)1/2 10.174