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

using model chemistry: QCISD(T)/cc-pVDZ

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)/cc-pVDZ
 hartrees
Energy at 0K-2651.515329
Energy at 298.15K 
HF Energy-2651.040021
Nuclear repulsion energy162.819701
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)/cc-pVDZ
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' 3133 2987        
2 A' 3102 2957        
3 A' 3046 2904        
4 A' 1489 1419        
5 A' 1477 1408        
6 A' 1404 1338        
7 A' 1279 1219        
8 A' 1087 1036        
9 A' 984 938        
10 A' 579 552        
11 A' 288 275        
12 A" 3174 3025        
13 A" 3148 3000        
14 A" 1476 1407        
15 A" 1260 1201        
16 A" 1033 985        
17 A" 766 730        
18 A" 272 260        

Unscaled Zero Point Vibrational Energy (zpe) 14499.1 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 13819.1 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)/cc-pVDZ
ABC
0.98912 0.12460 0.11558

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.578 -2.041 0.000
C2 0.604 -1.076 0.000
Br3 0.000 0.799 0.000
H4 1.233 -1.188 0.899
H5 1.233 -1.188 -0.899
H6 -0.200 -3.083 0.000
H7 -1.208 -1.895 0.896
H8 -1.208 -1.895 -0.896

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52612.89812.19452.19451.10801.10471.1047
C21.52611.96931.10271.10272.16172.18062.1806
Br32.89811.96932.50482.50483.88643.08493.0849
H42.19451.10272.50481.79712.53982.54103.1108
H52.19451.10272.50481.79712.53983.11082.5410
H61.10802.16173.88642.53982.53981.79681.7968
H71.10472.18063.08492.54103.11081.79681.7920
H81.10472.18063.08493.11082.54101.79681.7920

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 111.386 C1 C2 H4 112.191
C1 C2 H5 112.191 C2 C1 H6 109.282
C2 C1 H7 110.952 C2 C1 H8 110.952
Br3 C2 H4 105.768 Br3 C2 H5 105.768
H4 C2 H5 109.145 H6 C1 H7 108.595
H6 C1 H8 108.595 H7 C1 H8 108.402
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability