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

using model chemistry: B2PLYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/3-21G
 hartrees
Energy at 0K-2639.984567
Energy at 298.15K 
HF Energy-2639.910513
Nuclear repulsion energy161.227984
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 B2PLYP/3-21G
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' 3158 3158 24.12 54.20 0.07 0.12
2 A' 3143 3143 0.80 112.31 0.47 0.64
3 A' 3079 3079 13.89 125.59 0.08 0.15
4 A' 1586 1586 3.99 17.65 0.73 0.85
5 A' 1556 1556 4.67 17.71 0.75 0.86
6 A' 1489 1489 6.53 6.47 0.65 0.79
7 A' 1335 1335 54.76 4.62 0.60 0.75
8 A' 1099 1099 2.92 6.66 0.60 0.75
9 A' 993 993 14.59 4.94 0.74 0.85
10 A' 569 569 13.06 20.04 0.33 0.50
11 A' 289 289 2.07 3.59 0.54 0.70
12 A" 3219 3219 10.92 37.29 0.75 0.86
13 A" 3167 3167 8.16 72.29 0.75 0.86
14 A" 1574 1574 8.79 23.32 0.75 0.86
15 A" 1327 1327 0.81 8.69 0.75 0.86
16 A" 1073 1073 0.03 10.31 0.75 0.86
17 A" 799 799 7.17 1.49 0.75 0.86
18 A" 262 262 0.01 0.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14858.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14858.7 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 B2PLYP/3-21G
ABC
0.98613 0.12160 0.11286

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.582 -2.060 0.000
C2 0.611 -1.107 0.000
Br3 0.000 0.810 0.000
H4 1.224 -1.216 0.891
H5 1.224 -1.216 -0.891
H6 -0.220 -3.094 0.000
H7 -1.200 -1.906 0.886
H8 -1.200 -1.906 -0.886

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52682.92862.18412.18411.09541.09161.0916
C21.52682.01211.08721.08722.15382.16872.1687
Br32.92862.01212.52912.52913.91043.09893.0989
H42.18411.08722.52911.78162.53162.52103.0844
H52.18411.08722.52911.78162.53163.08442.5210
H61.09542.15383.91042.53162.53161.77701.7770
H71.09162.16873.09892.52103.08441.77701.7728
H81.09162.16873.09893.08442.52101.77701.7728

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 110.954 C1 C2 H4 112.252
C1 C2 H5 112.252 C2 C1 H6 109.337
C2 C1 H7 110.747 C2 C1 H8 110.747
Br3 C2 H4 105.455 Br3 C2 H5 105.455
H4 C2 H5 110.046 H6 C1 H7 108.683
H6 C1 H8 108.683 H7 C1 H8 108.591
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.547      
2 C -0.582      
3 Br 0.015      
4 H 0.245      
5 H 0.245      
6 H 0.201      
7 H 0.211      
8 H 0.211      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.447 -1.984 0.000 2.033
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.779 -0.860 0.000
y -0.860 -30.154 0.025
z 0.000 0.025 -32.106
Traceless
 xyz
x -0.649 -0.860 0.000
y -0.860 1.788 0.025
z 0.000 0.025 -1.140
Polar
3z2-r2-2.279
x2-y2-1.625
xy-0.860
xz0.000
yz0.025


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.644 -0.542 0.000
y -0.542 6.859 -0.001
z 0.000 -0.001 3.338


<r2> (average value of r2) Å2
<r2> 108.515
(<r2>)1/2 10.417