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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G
 hartrees
Energy at 0K-2648.613554
Energy at 298.15K 
HF Energy-2648.379064
Nuclear repulsion energy161.036245
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=FULL/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' 3155 2997 32.25      
2 A' 3141 2985 1.50      
3 A' 3067 2914 18.26      
4 A' 1570 1492 4.25      
5 A' 1553 1476 2.58      
6 A' 1499 1424 5.46      
7 A' 1350 1282 54.61      
8 A' 1116 1061 0.47      
9 A' 1023 972 12.65      
10 A' 556 528 12.82      
11 A' 290 276 2.01      
12 A" 3222 3062 14.17      
13 A" 3169 3011 12.26      
14 A" 1562 1484 8.10      
15 A" 1330 1264 0.72      
16 A" 1072 1019 0.05      
17 A" 800 760 5.16      
18 A" 273 260 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 14874.6 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 14132.3 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=FULL/6-31G
ABC
0.97143 0.12188 0.11295

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.586 -2.054 0.000
C2 0.617 -1.112 0.000
Br3 0.000 0.809 0.000
H4 1.233 -1.215 0.896
H5 1.233 -1.215 -0.896
H6 -0.238 -3.098 0.000
H7 -1.209 -1.895 0.889
H8 -1.209 -1.895 -0.889

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52762.92252.19422.19421.09991.09681.0968
C21.52762.01761.09221.09222.16202.17612.1761
Br32.92252.01762.53382.53383.91403.09253.0925
H42.19421.09222.53381.79132.55172.53493.0998
H52.19421.09222.53381.79132.55173.09982.5349
H61.09992.16203.91402.55172.55171.78261.7826
H71.09682.17613.09252.53493.09981.78261.7771
H81.09682.17613.09253.09982.53491.78261.7771

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 110.281 C1 C2 H4 112.707
C1 C2 H5 112.707 C2 C1 H6 109.659
C2 C1 H7 110.963 C2 C1 H8 110.963
Br3 C2 H4 105.217 Br3 C2 H5 105.217
H4 C2 H5 110.182 H6 C1 H7 108.479
H6 C1 H8 108.479 H7 C1 H8 108.221
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability