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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-2648.945283
Energy at 298.15K 
HF Energy-2648.538811
Nuclear repulsion energy163.398671
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 MP3/6-31G*
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' 3188 2992 20.42      
2 A' 3173 2978 3.86      
3 A' 3107 2916 15.16      
4 A' 1559 1463 2.98      
5 A' 1551 1456 1.11      
6 A' 1476 1385 5.95      
7 A' 1334 1252 54.93      
8 A' 1122 1054 0.25      
9 A' 1014 952 11.22      
10 A' 589 553 13.73      
11 A' 299 280 1.99      
12 A" 3243 3044 8.68      
13 A" 3205 3008 6.96      
14 A" 1547 1452 8.72      
15 A" 1312 1231 0.45      
16 A" 1073 1007 0.14      
17 A" 795 746 3.91      
18 A" 273 256 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 14928.7 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 14012.1 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 MP3/6-31G*
ABC
0.99697 0.12546 0.11633

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.578 -2.032 0.000
C2 0.605 -1.080 0.000
Br3 0.000 0.796 0.000
H4 1.224 -1.185 0.890
H5 1.224 -1.185 -0.890
H6 -0.213 -3.065 0.000
H7 -1.198 -1.881 0.886
H8 -1.198 -1.881 -0.886

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51732.88632.18052.18051.09591.09251.0925
C21.51731.97171.08911.08912.14672.16252.1625
Br32.88631.97172.49262.49263.86743.06413.0641
H42.18051.08912.49261.77962.52872.52033.0832
H52.18051.08912.49261.77962.52873.08322.5203
H61.09592.14673.86742.52872.52871.77721.7772
H71.09252.16253.06412.52033.08321.77721.7725
H81.09252.16253.06413.08322.52031.77721.7725

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 110.966 C1 C2 H4 112.527
C1 C2 H5 112.527 C2 C1 H6 109.407
C2 C1 H7 110.864 C2 C1 H8 110.864
Br3 C2 H4 105.384 Br3 C2 H5 105.384
H4 C2 H5 109.576 H6 C1 H7 108.606
H6 C1 H8 108.606 H7 C1 H8 108.432
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability