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

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G4
 hartrees
Energy at 0K-2652.774591
Energy at 298.15K-2652.769438
HF Energy-2653.109286
Nuclear repulsion energy162.948616
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(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' 3110 3001 22.80      
2 A' 3090 2982 4.89      
3 A' 3036 2930 18.78      
4 A' 1498 1446 1.50      
5 A' 1483 1431 0.78      
6 A' 1410 1361 2.57      
7 A' 1277 1232 49.74      
8 A' 1077 1039 0.12      
9 A' 976 942 13.49      
10 A' 573 553 14.07      
11 A' 286 276 1.83      
12 A" 3156 3045 12.58      
13 A" 3124 3015 4.80      
14 A" 1484 1432 6.95      
15 A" 1264 1220 0.31      
16 A" 1035 999 0.05      
17 A" 772 745 3.43      
18 A" 256 247 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 14452.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 13946.9 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(2df,p)
ABC
1.00526 0.12659 0.11739

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.574 -2.026 0.000
C2 0.600 -1.064 0.000
Br3 0.000 0.792 0.000
H4 1.224 -1.176 0.887
H5 1.224 -1.176 -0.887
H6 -0.203 -3.058 0.000
H7 -1.199 -1.886 0.886
H8 -1.199 -1.886 -0.886

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51812.87662.17782.17781.09651.09291.0929
C21.51811.95121.09001.09002.14942.16712.1671
Br32.87661.95122.48182.48183.85583.06513.0651
H42.17781.09002.48181.77352.52272.52483.0848
H52.17781.09002.48181.77352.52273.08482.5248
H61.09652.14943.85582.52272.52271.77501.7750
H71.09292.16713.06512.52483.08481.77501.7712
H81.09292.16713.06513.08482.52481.77501.7712

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 111.655 C1 C2 H4 112.472
C1 C2 H5 112.472 C2 C1 H6 109.208
C2 C1 H7 111.201 C2 C1 H8 111.201
Br3 C2 H4 105.152 Br3 C2 H5 105.152
H4 C2 H5 109.441 H6 C1 H7 108.344
H6 C1 H8 108.344 H7 C1 H8 108.457
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.354      
2 C -0.289      
3 Br -0.059      
4 H 0.151      
5 H 0.151      
6 H 0.121      
7 H 0.139      
8 H 0.139      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.441 -2.029 0.000 2.076
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 105.169
(<r2>)1/2 10.255