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

using model chemistry: QCISD(T)/6-311G*

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(T)/6-311G*
 hartrees
Energy at 0K-2651.489048
Energy at 298.15K 
HF Energy-2651.033291
Nuclear repulsion energy163.231457
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(T)/6-311G*
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' 3104 2988        
2 A' 3086 2971        
3 A' 3026 2914        
4 A' 1521 1464        
5 A' 1508 1452        
6 A' 1441 1387        
7 A' 1315 1266        
8 A' 1097 1056        
9 A' 991 954        
10 A' 578 557        
11 A' 292 281        
12 A" 3153 3036        
13 A" 3119 3003        
14 A" 1510 1454        
15 A" 1285 1237        
16 A" 1062 1022        
17 A" 780 751        
18 A" 277 266        

Unscaled Zero Point Vibrational Energy (zpe) 14571.5 cm-1
Scaled (by 0.9628) Zero Point Vibrational Energy (zpe) 14029.5 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(T)/6-311G*
ABC
0.99662 0.12510 0.11604

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.577 -2.036 0.000
C2 0.603 -1.076 0.000
Br3 0.000 0.797 0.000
H4 1.226 -1.189 0.891
H5 1.226 -1.189 -0.891
H6 -0.206 -3.071 0.000
H7 -1.202 -1.892 0.888
H8 -1.202 -1.892 -0.888

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52162.89162.18252.18251.09941.09571.0957
C21.52161.96821.09311.09312.15302.17112.1711
Br32.89161.96822.49852.49853.87393.07673.0767
H42.18251.09312.49851.78272.52752.52763.0914
H52.18251.09312.49851.78272.52753.09142.5276
H61.09942.15303.87392.52752.52751.78071.7807
H71.09572.17113.07672.52763.09141.78071.7770
H81.09572.17113.07673.09142.52761.78071.7770

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 111.269 C1 C2 H4 112.136
C1 C2 H5 112.136 C2 C1 H6 109.407
C2 C1 H7 111.060 C2 C1 H8 111.060
Br3 C2 H4 105.833 Br3 C2 H5 105.833
H4 C2 H5 109.256 H6 C1 H7 108.435
H6 C1 H8 108.435 H7 C1 H8 108.366
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability