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

using model chemistry: BLYP/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 BLYP/3-21G*
 hartrees
Energy at 0K-2640.778397
Energy at 298.15K 
HF Energy-2640.778397
Nuclear repulsion energy161.248143
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 BLYP/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' 3042 3022 27.92      
2 A' 3026 3007 1.32      
3 A' 2970 2951 18.91      
4 A' 1531 1521 3.29      
5 A' 1500 1491 2.26      
6 A' 1426 1417 5.88      
7 A' 1265 1256 50.75      
8 A' 1054 1047 2.50      
9 A' 942 935 14.93      
10 A' 548 545 12.79      
11 A' 274 273 2.50      
12 A" 3095 3074 16.58      
13 A" 3057 3037 5.62      
14 A" 1516 1506 9.10      
15 A" 1267 1259 0.73      
16 A" 1023 1017 0.00      
17 A" 774 769 6.64      
18 A" 249 247 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 14278.8 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 14186.0 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 BLYP/3-21G*
ABC
0.96730 0.12230 0.11331

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.588 -2.056 0.000
C2 0.617 -1.099 0.000
Br3 0.000 0.807 0.000
H4 1.236 -1.208 0.900
H5 1.236 -1.208 -0.900
H6 -0.228 -3.101 0.000
H7 -1.210 -1.896 0.894
H8 -1.210 -1.896 -0.894

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.53902.92232.20392.20391.10541.10061.1006
C21.53902.00361.09751.09752.17302.18482.1848
Br32.92232.00362.52942.52943.91443.09353.0935
H42.20391.09752.52941.79982.55692.54083.1105
H52.20391.09752.52941.79982.55693.11052.5408
H61.10542.17303.91442.55692.55691.79261.7926
H71.10062.18483.09352.54083.11051.79261.7886
H81.10062.18483.09353.11052.54081.79261.7886

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 110.472 C1 C2 H4 112.337
C1 C2 H5 112.337 C2 C1 H6 109.426
C2 C1 H7 110.630 C2 C1 H8 110.630
Br3 C2 H4 105.553 Br3 C2 H5 105.553
H4 C2 H5 110.158 H6 C1 H7 108.704
H6 C1 H8 108.704 H7 C1 H8 108.700
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.529      
2 C -0.407      
3 Br -0.089      
4 H 0.219      
5 H 0.219      
6 H 0.185      
7 H 0.200      
8 H 0.200      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.409 -1.867 0.000 1.912
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.350 -0.981 0.000
y -0.981 -29.432 0.000
z 0.000 0.000 -31.765
Traceless
 xyz
x -0.751 -0.981 0.000
y -0.981 2.126 0.000
z 0.000 0.000 -1.374
Polar
3z2-r2-2.749
x2-y2-1.918
xy-0.981
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.503 -0.264 0.000
y -0.264 7.217 0.000
z 0.000 0.000 4.230


<r2> (average value of r2) Å2
<r2> 108.001
(<r2>)1/2 10.392