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

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-2640.983148
Energy at 298.15K 
HF Energy-2640.983148
Nuclear repulsion energy164.116405
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 mPW1PW91/3-21G*
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' 3153 2994 17.38      
2 A' 3131 2973 4.70      
3 A' 3076 2921 14.16      
4 A' 1566 1487 5.05      
5 A' 1538 1460 4.97      
6 A' 1468 1394 12.35      
7 A' 1317 1251 41.60      
8 A' 1098 1043 3.56      
9 A' 997 946 15.20      
10 A' 601 571 10.97      
11 A' 291 276 2.09      
12 A" 3204 3042 8.87      
13 A" 3168 3008 3.88      
14 A" 1554 1476 12.90      
15 A" 1309 1243 0.97      
16 A" 1069 1015 0.01      
17 A" 799 759 8.60      
18 A" 261 248 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14799.6 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 14053.7 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 mPW1PW91/3-21G*
ABC
0.98542 0.12731 0.11778

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.582 -2.017 0.000
C2 0.611 -1.070 0.000
Br3 0.000 0.790 0.000
H4 1.227 -1.186 0.892
H5 1.227 -1.186 -0.892
H6 -0.230 -3.055 0.000
H7 -1.199 -1.855 0.887
H8 -1.199 -1.855 -0.887

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52342.86652.18142.18141.09651.09271.0927
C21.52341.95821.09011.09012.15612.16392.1639
Br32.86651.95822.49142.49143.85213.03723.0372
H42.18141.09012.49141.78462.53232.51663.0823
H52.18141.09012.49141.78462.53233.08232.5166
H61.09652.15613.85212.53232.53231.77911.7791
H71.09272.16393.03722.51663.08231.77911.7749
H81.09272.16393.03723.08232.51661.77911.7749

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 110.213 C1 C2 H4 112.095
C1 C2 H5 112.095 C2 C1 H6 109.695
C2 C1 H7 110.532 C2 C1 H8 110.532
Br3 C2 H4 106.107 Br3 C2 H5 106.107
H4 C2 H5 109.883 H6 C1 H7 108.714
H6 C1 H8 108.714 H7 C1 H8 108.606
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.640      
2 C -0.501      
3 Br -0.083      
4 H 0.262      
5 H 0.262      
6 H 0.224      
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
  0.433 -1.914 0.000 1.962
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.225 -1.026 0.000
y -1.026 -29.400 0.000
z 0.000 0.000 -31.649
Traceless
 xyz
x -0.700 -1.026 0.000
y -1.026 2.037 0.000
z 0.000 0.000 -1.337
Polar
3z2-r2-2.673
x2-y2-1.825
xy-1.026
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.418 -0.286 0.000
y -0.286 6.884 0.000
z 0.000 0.000 4.161


<r2> (average value of r2) Å2
<r2> 104.750
(<r2>)1/2 10.235