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

using model chemistry: B3LYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/6-31G*
 hartrees
Energy at 0K-2650.934758
Energy at 298.15K 
HF Energy-2650.934758
Nuclear repulsion energy162.598929
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 B3LYP/6-31G*
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' 3127 3003 29.66      
2 A' 3114 2991 0.16      
3 A' 3050 2929 19.93      
4 A' 1529 1468 2.20      
5 A' 1514 1454 0.71      
6 A' 1438 1381 3.61      
7 A' 1290 1239 65.53      
8 A' 1088 1045 0.17      
9 A' 981 942 15.06      
10 A' 553 531 17.78      
11 A' 285 274 2.64      
12 A" 3186 3059 12.28      
13 A" 3143 3018 8.51      
14 A" 1514 1454 7.92      
15 A" 1279 1228 0.46      
16 A" 1037 996 0.08      
17 A" 776 745 4.28      
18 A" 259 249 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14581.3 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 14002.4 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 B3LYP/6-31G*
ABC
0.99823 0.12385 0.11496

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.576 -2.044 0.000
C2 0.603 -1.089 0.000
Br3 0.000 0.802 0.000
H4 1.224 -1.188 0.890
H5 1.224 -1.188 -0.890
H6 -0.208 -3.079 0.000
H7 -1.200 -1.901 0.887
H8 -1.200 -1.901 -0.887

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51742.90362.18322.18321.09811.09381.0938
C21.51741.98501.09011.09012.14802.16752.1675
Br32.90361.98502.50032.50033.88583.08753.0875
H42.18321.09012.50031.78092.53302.52713.0895
H52.18321.09012.50031.78092.53303.08952.5271
H61.09812.14803.88582.53302.53301.77711.7771
H71.09382.16753.08752.52713.08951.77711.7737
H81.09382.16753.08753.08952.52711.77711.7737

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 111.300 C1 C2 H4 112.684
C1 C2 H5 112.684 C2 C1 H6 109.381
C2 C1 H7 111.179 C2 C1 H8 111.179
Br3 C2 H4 105.043 Br3 C2 H5 105.043
H4 C2 H5 109.548 H6 C1 H7 108.337
H6 C1 H8 108.337 H7 C1 H8 108.339
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.438      
2 C -0.283      
3 Br -0.155      
4 H 0.190      
5 H 0.190      
6 H 0.155      
7 H 0.171      
8 H 0.171      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.468 -2.121 0.000 2.172
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.459 -1.008 0.000
y -1.008 -29.563 0.000
z 0.000 0.000 -31.824
Traceless
 xyz
x -0.765 -1.008 0.000
y -1.008 2.079 0.000
z 0.000 0.000 -1.313
Polar
3z2-r2-2.626
x2-y2-1.896
xy-1.008
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.857 -0.245 0.000
y -0.245 7.475 0.000
z 0.000 0.000 4.603


<r2> (average value of r2) Å2
<r2> 106.803
(<r2>)1/2 10.335