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

using model chemistry: QCISD/STO-3G

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/STO-3G
 hartrees
Energy at 0K-2622.551155
Energy at 298.15K 
HF Energy-2622.391036
Nuclear repulsion energy162.021107
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/STO-3G
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' 3439 3439 1.52      
2 A' 3300 3300 3.11      
3 A' 3280 3280 1.90      
4 A' 1685 1685 0.36      
5 A' 1657 1657 1.23      
6 A' 1578 1578 0.41      
7 A' 1437 1437 35.18      
8 A' 1159 1159 1.93      
9 A' 1078 1078 3.26      
10 A' 698 698 2.74      
11 A' 301 301 0.79      
12 A" 3448 3448 2.60      
13 A" 3404 3404 2.43      
14 A" 1677 1677 1.34      
15 A" 1383 1383 0.00      
16 A" 1141 1141 1.19      
17 A" 826 826 1.19      
18 A" 232 232 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 15860.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15860.9 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/STO-3G
ABC
0.97987 0.12277 0.11394

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.583 -2.071 0.000
C2 0.606 -1.050 0.000
Br3 0.000 0.803 0.000
H4 1.243 -1.208 0.901
H5 1.243 -1.208 -0.901
H6 -0.184 -3.109 0.000
H7 -1.219 -1.937 0.902
H8 -1.219 -1.937 -0.902

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.56722.93262.21202.21201.11241.11141.1114
C21.56721.94941.11541.11542.20542.22002.2200
Br32.93261.94942.53072.53073.91653.13143.1314
H42.21201.11542.53071.80252.54202.56753.1375
H52.21201.11542.53071.80252.54203.13752.5675
H61.11242.20543.91652.54202.54201.80521.8052
H71.11142.22003.13142.56753.13751.80521.8041
H81.11142.22003.13143.13752.56751.80521.8041

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 112.556 C1 C2 H4 109.946
C1 C2 H5 109.946 C2 C1 H6 109.611
C2 C1 H7 110.795 C2 C1 H8 110.795
Br3 C2 H4 108.227 Br3 C2 H5 108.227
H4 C2 H5 107.801 H6 C1 H7 108.534
H6 C1 H8 108.534 H7 C1 H8 108.508
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability