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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-2641.104952
Energy at 298.15K 
HF Energy-2641.104952
Nuclear repulsion energy164.471307
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 B1B95/3-21G
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' 3157 3020 17.69 57.78 0.60 0.75
2 A' 3135 2999 4.48 107.58 0.19 0.32
3 A' 3079 2945 14.08 126.49 0.07 0.14
4 A' 1565 1497 4.86 17.23 0.73 0.85
5 A' 1538 1471 4.62 14.69 0.75 0.85
6 A' 1467 1403 11.74 6.13 0.65 0.79
7 A' 1316 1259 41.45 3.24 0.65 0.78
8 A' 1097 1050 3.24 4.95 0.49 0.66
9 A' 996 953 14.81 4.20 0.74 0.85
10 A' 606 579 11.07 17.23 0.27 0.42
11 A' 288 276 2.04 2.02 0.46 0.63
12 A" 3207 3068 9.16 22.22 0.75 0.86
13 A" 3171 3034 4.02 83.86 0.75 0.86
14 A" 1553 1485 12.69 22.94 0.75 0.86
15 A" 1308 1251 0.87 7.34 0.75 0.86
16 A" 1067 1021 0.01 7.03 0.75 0.86
17 A" 798 764 8.11 0.56 0.75 0.86
18 A" 265 254 0.02 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14805.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 14164.8 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 B1B95/3-21G
ABC
0.98554 0.12805 0.11839

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.582 -2.010 0.000
C2 0.612 -1.068 0.000
Br3 0.000 0.788 0.000
H4 1.226 -1.185 0.891
H5 1.226 -1.185 -0.891
H6 -0.236 -3.048 0.000
H7 -1.198 -1.846 0.886
H8 -1.198 -1.846 -0.886

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52132.85802.17872.17871.09471.09101.0910
C21.52131.95441.08841.08842.15422.16012.1601
Br32.85801.95442.48792.48793.84363.02613.0261
H42.17871.08842.48791.78172.53072.51283.0775
H52.17871.08842.48791.78172.53073.07752.5128
H61.09472.15423.84362.53072.53071.77651.7765
H71.09102.16013.02612.51283.07751.77651.7716
H81.09102.16013.02613.07752.51281.77651.7716

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 110.003 C1 C2 H4 112.133
C1 C2 H5 112.133 C2 C1 H6 109.796
C2 C1 H7 110.478 C2 C1 H8 110.478
Br3 C2 H4 106.181 Br3 C2 H5 106.181
H4 C2 H5 109.871 H6 C1 H7 108.739
H6 C1 H8 108.739 H7 C1 H8 108.564
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.619      
2 C -0.490      
3 Br -0.084      
4 H 0.256      
5 H 0.256      
6 H 0.217      
7 H 0.232      
8 H 0.232      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.428 -1.881 0.000 1.929
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.181 -1.028 0.000
y -1.028 -29.361 0.000
z 0.000 0.000 -31.601
Traceless
 xyz
x -0.700 -1.028 0.000
y -1.028 2.030 0.000
z 0.000 0.000 -1.330
Polar
3z2-r2-2.661
x2-y2-1.820
xy-1.028
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.421 -0.286 0.000
y -0.286 6.874 0.000
z 0.000 0.000 4.163


<r2> (average value of r2) Å2
<r2> 104.293
(<r2>)1/2 10.212