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

using model chemistry: MP2=FULL/STO-3G

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/STO-3G
 hartrees
Energy at 0K-2622.512511
Energy at 298.15K 
HF Energy-2622.392931
Nuclear repulsion energy162.844749
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/STO-3G
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' 3556 3161 0.91      
2 A' 3397 3019 3.07      
3 A' 3378 3003 1.62      
4 A' 1730 1538 0.43      
5 A' 1699 1510 1.58      
6 A' 1612 1433 0.30      
7 A' 1472 1308 41.63      
8 A' 1187 1055 2.19      
9 A' 1104 981 4.56      
10 A' 722 642 3.98      
11 A' 308 274 0.90      
12 A" 3564 3168 1.69      
13 A" 3512 3122 2.04      
14 A" 1722 1531 1.55      
15 A" 1420 1262 0.00      
16 A" 1170 1040 1.40      
17 A" 843 749 1.53      
18 A" 238 212 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 16317.0 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 14504.2 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/STO-3G
ABC
0.99303 0.12385 0.11496

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.580 -2.063 0.000
C2 0.602 -1.043 0.000
Br3 0.000 0.800 0.000
H4 1.236 -1.202 0.894
H5 1.236 -1.202 -0.894
H6 -0.181 -3.092 0.000
H7 -1.211 -1.932 0.895
H8 -1.211 -1.932 -0.895

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.56042.92082.19972.19971.10391.10301.1030
C21.56041.93901.10781.10782.19332.20822.2082
Br32.92081.93902.51682.51683.89643.11923.1192
H42.19971.10782.51681.78852.52642.55383.1182
H52.19971.10782.51681.78852.52643.11822.5538
H61.10392.19333.89642.52642.52641.79121.7912
H71.10302.20823.11922.55383.11821.79121.7899
H81.10302.20823.11923.11822.55381.79121.7899

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 112.713 C1 C2 H4 109.892
C1 C2 H5 109.892 C2 C1 H6 109.622
C2 C1 H7 110.837 C2 C1 H8 110.837
Br3 C2 H4 108.274 Br3 C2 H5 108.274
H4 C2 H5 107.648 H6 C1 H7 108.509
H6 C1 H8 108.509 H7 C1 H8 108.460
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability