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

using model chemistry: HF/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/aug-cc-pVQZ
 hartrees
Energy at 0K-2651.151194
Energy at 298.15K 
HF Energy-2651.151194
Nuclear repulsion energy164.244015
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 HF/aug-cc-pVQZ
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' 3248 2951 32.02 98.04 0.05 0.10
2 A' 3223 2928 8.74 89.98 0.49 0.66
3 A' 3161 2872 27.68 182.29 0.07 0.12
4 A' 1615 1467 1.76 1.64 0.73 0.85
5 A' 1611 1463 1.54 6.73 0.66 0.80
6 A' 1539 1398 2.83 0.77 0.65 0.79
7 A' 1398 1270 71.68 8.13 0.28 0.44
8 A' 1158 1052 0.65 5.00 0.10 0.18
9 A' 1038 943 13.90 3.90 0.73 0.84
10 A' 602 547 28.46 28.20 0.20 0.34
11 A' 307 279 2.36 3.20 0.25 0.40
12 A" 3307 3005 9.41 38.02 0.75 0.86
13 A" 3247 2950 15.47 58.43 0.75 0.86
14 A" 1602 1456 8.55 5.27 0.75 0.86
15 A" 1372 1246 0.12 0.97 0.75 0.86
16 A" 1128 1025 0.12 0.90 0.75 0.86
17 A" 831 755 2.67 0.00 0.75 0.86
18 A" 275 250 0.03 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15330.8 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 13928.1 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 HF/aug-cc-pVQZ
ABC
1.02252 0.12597 0.11699

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.571 -2.033 0.000
C2 0.596 -1.070 0.000
Br3 0.000 0.794 0.000
H4 1.209 -1.172 0.878
H5 1.209 -1.172 -0.878
H6 -0.191 -3.049 0.000
H7 -1.188 -1.899 0.877
H8 -1.188 -1.899 -0.877

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51272.88402.16362.16361.08491.08091.0809
C21.51271.95751.07591.07592.12942.15392.1539
Br32.88401.95752.46962.46963.84793.07153.0715
H42.16361.07592.46961.75652.50112.50503.0589
H52.16361.07592.46961.75652.50113.05892.5050
H61.08492.12943.84792.50112.50111.75671.7567
H71.08092.15393.07152.50503.05891.75671.7547
H81.08092.15393.07153.05892.50501.75671.7547

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 111.786 C1 C2 H4 112.308
C1 C2 H5 112.308 C2 C1 H6 109.013
C2 C1 H7 111.203 C2 C1 H8 111.203
Br3 C2 H4 105.272 Br3 C2 H5 105.272
H4 C2 H5 109.434 H6 C1 H7 108.411
H6 C1 H8 108.411 H7 C1 H8 108.518
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.777      
2 C -0.487      
3 Br -0.108      
4 H 0.289      
5 H 0.289      
6 H 0.261      
7 H 0.266      
8 H 0.266      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.544 -2.386 0.000 2.448
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.107 -1.039 0.000
y -1.039 -30.415 0.000
z 0.000 0.000 -32.410
Traceless
 xyz
x -0.695 -1.039 0.000
y -1.039 1.844 0.000
z 0.000 0.000 -1.149
Polar
3z2-r2-2.298
x2-y2-1.693
xy-1.039
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.331 -0.140 0.000
y -0.140 8.692 0.000
z 0.000 0.000 5.982


<r2> (average value of r2) Å2
<r2> 105.715
(<r2>)1/2 10.282