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

using model chemistry: QCISD/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/cc-pVTZ-PP
 hartrees
Energy at 0K-494.805243
Energy at 298.15K 
HF Energy-494.187732
Nuclear repulsion energy128.167887
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 QCISD/cc-pVTZ-PP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3133 3133 27.10      
2 A' 3119 3119 2.32      
3 A' 3056 3056 18.54      
4 A' 1517 1517 1.71      
5 A' 1505 1505 1.06      
6 A' 1431 1431 3.74      
7 A' 1303 1303 49.75      
8 A' 1098 1098 0.01      
9 A' 995 995 10.78      
10 A' 597 597 12.32      
11 A' 291 291 1.25      
12 A" 3184 3184 9.48      
13 A" 3145 3145 7.94      
14 A" 1506 1506 8.12      
15 A" 1284 1284 0.29      
16 A" 1050 1050 0.21      
17 A" 781 781 2.83      
18 A" 264 264 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14629.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14629.2 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 QCISD/cc-pVTZ-PP
ABC
1.00839 0.12747 0.11816

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVTZ-PP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.574 -2.019 0.000
C2 0.600 -1.063 0.000
Br3 0.000 0.789 0.000
H4 1.219 -1.171 0.885
H5 1.219 -1.171 -0.885
H6 -0.207 -3.048 0.000
H7 -1.195 -1.874 0.883
H8 -1.195 -1.874 -0.883

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51442.86672.17212.17211.09211.08891.0889
C21.51441.94731.08541.08542.14272.15872.1587
Br32.86671.94732.47272.47273.84283.05013.0501
H42.17211.08542.47271.77042.51772.51413.0736
H52.17211.08542.47271.77042.51773.07362.5141
H61.09212.14273.84282.51772.51771.76961.7696
H71.08892.15873.05012.51413.07361.76961.7658
H81.08892.15873.05013.07362.51411.76961.7658

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 111.192 C1 C2 H4 112.276
C1 C2 H5 112.276 C2 C1 H6 109.519
C2 C1 H7 110.983 C2 C1 H8 110.983
Br3 C2 H4 105.701 Br3 C2 H5 105.701
H4 C2 H5 109.287 H6 C1 H7 108.462
H6 C1 H8 108.462 H7 C1 H8 108.357
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability