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

using model chemistry: QCISD/TZVP

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/TZVP
 hartrees
Energy at 0K-2651.652984
Energy at 298.15K 
HF Energy-2651.089593
Nuclear repulsion energy163.641685
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/TZVP
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' 3146 3005 33.55      
2 A' 3133 2993 1.64      
3 A' 3067 2930 20.60      
4 A' 1520 1452 1.74      
5 A' 1513 1445 0.72      
6 A' 1452 1387 2.66      
7 A' 1327 1268 64.03      
8 A' 1103 1053 0.00      
9 A' 996 952 9.59      
10 A' 586 560 14.35      
11 A' 292 279 1.48      
12 A" 3203 3060 11.98      
13 A" 3159 3018 10.37      
14 A" 1510 1442 7.04      
15 A" 1291 1233 0.42      
16 A" 1061 1014 0.53      
17 A" 789 754 2.08      
18 A" 274 262 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14710.9 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 14053.3 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 QCISD/TZVP
ABC
1.00765 0.12548 0.11646

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.574 -2.034 0.000
C2 0.600 -1.075 0.000
Br3 0.000 0.796 0.000
H4 1.218 -1.184 0.887
H5 1.218 -1.184 -0.887
H6 -0.199 -3.061 0.000
H7 -1.196 -1.892 0.884
H8 -1.196 -1.892 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51592.88752.17252.17251.09361.09031.0903
C21.51591.96481.08671.08672.14082.16222.1622
Br32.88751.96482.48862.48863.86233.07243.0724
H42.17251.08672.48861.77412.51322.51543.0766
H52.17251.08672.48861.77412.51323.07662.5154
H61.09362.14083.86232.51322.51321.77251.7725
H71.09032.16223.07242.51543.07661.77251.7689
H81.09032.16223.07243.07662.51541.77251.7689

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 111.461 C1 C2 H4 112.128
C1 C2 H5 112.128 C2 C1 H6 109.180
C2 C1 H7 111.071 C2 C1 H8 111.071
Br3 C2 H4 105.648 Br3 C2 H5 105.648
H4 C2 H5 109.434 H6 C1 H7 108.512
H6 C1 H8 108.512 H7 C1 H8 108.423
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability