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

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

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-pVTZ
 hartrees
Energy at 0K-2651.783962
Energy at 298.15K 
HF Energy-2651.142527
Nuclear repulsion energy164.249046
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-pVTZ
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' 3117 2956        
2 A' 3100 2941        
3 A' 3039 2883        
4 A' 1504 1427        
5 A' 1488 1412        
6 A' 1414 1341        
7 A' 1286 1220        
8 A' 1086 1030        
9 A' 983 933        
10 A' 588 558        
11 A' 287 272        
12 A" 3166 3003        
13 A" 3129 2968        
14 A" 1493 1416        
15 A" 1271 1205        
16 A" 1039 985        
17 A" 770 731        
18 A" 263 250        

Unscaled Zero Point Vibrational Energy (zpe) 14511.8 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 13765.9 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-pVTZ
ABC
1.00409 0.12679 0.11754

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.576 -2.024 0.000
C2 0.602 -1.067 0.000
Br3 0.000 0.792 0.000
H4 1.221 -1.176 0.887
H5 1.221 -1.176 -0.887
H6 -0.208 -3.054 0.000
H7 -1.196 -1.878 0.884
H8 -1.196 -1.878 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51702.87382.17542.17541.09351.09031.0903
C21.51701.95401.08711.08712.14512.16152.1615
Br32.87381.95402.48012.48013.85113.05583.0558
H42.17541.08712.48011.77382.52052.51703.0777
H52.17541.08712.48011.77382.52053.07772.5170
H61.09352.14513.85112.52052.52051.77271.7727
H71.09032.16153.05582.51703.07771.77271.7687
H81.09032.16153.05583.07772.51701.77271.7687

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 111.152 C1 C2 H4 112.260
C1 C2 H5 112.260 C2 C1 H6 109.445
C2 C1 H7 110.931 C2 C1 H8 110.931
Br3 C2 H4 105.715 Br3 C2 H5 105.715
H4 C2 H5 109.336 H6 C1 H7 108.534
H6 C1 H8 108.534 H7 C1 H8 108.399
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability