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

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G
 hartrees
Energy at 0K-2640.414439
Energy at 298.15K 
HF Energy-2640.414439
Nuclear repulsion energy164.194387
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 PBE1PBE/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' 3148 3023 16.08 59.81 0.63 0.77
2 A' 3124 3001 5.16 105.90 0.18 0.30
3 A' 3069 2948 13.48 125.92 0.07 0.14
4 A' 1562 1500 5.12 17.22 0.73 0.85
5 A' 1534 1473 5.01 14.57 0.75 0.85
6 A' 1464 1406 13.00 6.12 0.65 0.79
7 A' 1316 1264 40.79 3.33 0.65 0.79
8 A' 1098 1055 3.38 4.82 0.48 0.65
9 A' 999 960 15.46 4.06 0.75 0.86
10 A' 608 584 10.46 16.75 0.27 0.42
11 A' 292 281 2.06 2.02 0.46 0.63
12 A" 3197 3070 8.58 20.09 0.75 0.86
13 A" 3162 3037 3.44 85.84 0.75 0.86
14 A" 1549 1488 13.09 22.93 0.75 0.86
15 A" 1308 1256 1.00 7.15 0.75 0.86
16 A" 1068 1026 0.02 6.95 0.75 0.86
17 A" 799 767 8.66 0.54 0.75 0.86
18 A" 266 256 0.02 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14782.8 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 14197.4 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 PBE1PBE/3-21G
ABC
0.98505 0.12751 0.11795

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.582 -2.015 0.000
C2 0.611 -1.069 0.000
Br3 0.000 0.790 0.000
H4 1.228 -1.186 0.893
H5 1.228 -1.186 -0.893
H6 -0.230 -3.055 0.000
H7 -1.200 -1.853 0.888
H8 -1.200 -1.853 -0.888

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52292.86432.18182.18181.09781.09411.0941
C21.52291.95621.09161.09162.15722.16452.1645
Br32.86431.95622.49162.49163.85143.03553.0355
H42.18181.09162.49161.78632.53312.51783.0843
H52.18181.09162.49161.78632.53313.08432.5178
H61.09782.15723.85142.53312.53311.78131.7813
H71.09412.16453.03552.51783.08431.78131.7766
H81.09412.16453.03553.08432.51781.78131.7766

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 110.212 C1 C2 H4 112.071
C1 C2 H5 112.071 C2 C1 H6 109.736
C2 C1 H7 110.532 C2 C1 H8 110.532
Br3 C2 H4 106.174 Br3 C2 H5 106.174
H4 C2 H5 109.807 H6 C1 H7 108.714
H6 C1 H8 108.714 H7 C1 H8 108.564
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.643      
2 C -0.505      
3 Br -0.080      
4 H 0.262      
5 H 0.262      
6 H 0.225      
7 H 0.239      
8 H 0.239      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.431 -1.897 0.000 1.945
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.287 -1.029 0.000
y -1.029 -29.462 0.000
z 0.000 0.000 -31.708
Traceless
 xyz
x -0.702 -1.029 0.000
y -1.029 2.036 0.000
z 0.000 0.000 -1.334
Polar
3z2-r2-2.667
x2-y2-1.825
xy-1.029
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.429 -0.284 0.000
y -0.284 6.881 0.000
z 0.000 0.000 4.173


<r2> (average value of r2) Å2
<r2> 104.692
(<r2>)1/2 10.232