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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-2638.801555
Energy at 298.15K 
HF Energy-2638.484853
Nuclear repulsion energy162.991979
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 MP2/3-21G*
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' 3165 3011 16.28      
2 A' 3142 2989 5.72      
3 A' 3089 2939 12.12      
4 A' 1601 1523 3.34      
5 A' 1579 1502 3.28      
6 A' 1499 1426 6.32      
7 A' 1350 1285 47.62      
8 A' 1110 1056 2.84      
9 A' 983 935 9.54      
10 A' 604 574 11.52      
11 A' 296 282 1.94      
12 A" 3212 3055 10.09      
13 A" 3181 3026 4.38      
14 A" 1590 1513 8.47      
15 A" 1337 1272 0.52      
16 A" 1093 1040 0.02      
17 A" 813 774 5.46      
18 A" 275 262 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 14960.5 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 14231.9 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 MP2/3-21G*
ABC
0.97267 0.12543 0.11600

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.588 -2.033 0.000
C2 0.618 -1.079 0.000
Br3 0.000 0.796 0.000
H4 1.232 -1.194 0.894
H5 1.232 -1.194 -0.894
H6 -0.235 -3.071 0.000
H7 -1.203 -1.866 0.889
H8 -1.203 -1.866 -0.889

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.53752.88952.19462.19461.09671.09301.0930
C21.53751.97481.09051.09052.16632.17332.1733
Br32.88951.97482.50562.50563.87423.05363.0536
H42.19461.09052.50561.78762.54422.52593.0914
H52.19461.09052.50561.78762.54423.09142.5259
H61.09672.16633.87422.54422.54421.78261.7826
H71.09302.17333.05362.52593.09141.78261.7770
H81.09302.17333.05363.09142.52591.78261.7770

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 110.088 C1 C2 H4 112.127
C1 C2 H5 112.127 C2 C1 H6 109.511
C2 C1 H7 110.273 C2 C1 H8 110.273
Br3 C2 H4 106.025 Br3 C2 H5 106.025
H4 C2 H5 110.094 H6 C1 H7 108.996
H6 C1 H8 108.996 H7 C1 H8 108.761
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability