return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CHBrCH3 (i-propyl bromide)

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-2680.081144
Energy at 298.15K-2680.091662
HF Energy-2680.081144
Nuclear repulsion energy251.527899
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 mPW1PW91/3-21G*
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' 3179 3019 18.89      
2 A' 3154 2995 17.95      
3 A' 3137 2979 2.25      
4 A' 3073 2918 21.11      
5 A' 1571 1491 12.11      
6 A' 1559 1481 12.98      
7 A' 1474 1400 10.28      
8 A' 1295 1230 42.38      
9 A' 1219 1158 30.27      
10 A' 1098 1043 11.35      
11 A' 900 855 6.43      
12 A' 578 549 12.59      
13 A' 410 390 1.09      
14 A' 299 284 1.93      
15 A' 268 255 0.53      
16 A" 3171 3011 8.15      
17 A" 3144 2986 2.29      
18 A" 3068 2913 8.70      
19 A" 1549 1471 1.04      
20 A" 1545 1467 5.17      
21 A" 1457 1384 21.11      
22 A" 1386 1316 1.45      
23 A" 1158 1100 2.09      
24 A" 992 942 2.74      
25 A" 982 932 1.18      
26 A" 288 273 0.59      
27 A" 249 237 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 21101.3 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 20037.8 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 mPW1PW91/3-21G*
ABC
0.26748 0.09766 0.07691

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.469 -0.894 0.000
Br2 -0.067 1.002 0.000
H3 1.560 -0.872 0.000
C4 -0.067 -1.546 1.270
C5 -0.067 -1.546 -1.270
H6 -1.160 -1.504 1.279
H7 0.245 -2.597 1.300
H8 0.311 -1.040 2.161
H9 -1.160 -1.504 -1.279
H10 0.245 -2.597 -1.300
H11 0.311 -1.040 -2.161

Atom - Atom Distances (Å)
  C1 Br2 H3 C4 C5 H6 H7 H8 H9 H10 H11
C11.97061.09161.52471.52472.15922.15442.17162.15922.15442.1716
Br21.97062.48222.84702.84703.01813.83972.99733.01813.83972.9973
H31.09162.48222.17162.17163.07192.52952.50163.07192.52952.5016
C41.52472.84702.17162.53911.09361.09691.09272.77362.79393.4882
C51.52472.84702.17162.53912.77362.79393.48821.09361.09691.0927
H62.15923.01813.07191.09362.77361.78051.77682.55873.13433.7703
H72.15443.83972.52951.09692.79391.78051.78043.13432.60043.7958
H82.17162.99732.50161.09273.48821.77681.78043.77033.79584.3218
H92.15923.01813.07192.77361.09362.55873.13433.77031.78051.7768
H102.15443.83972.52952.79391.09693.13432.60043.79581.78051.7804
H112.17162.99732.50163.48821.09273.77033.79584.32181.77681.7804

picture of i-propyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C4 H6 110.016 C1 C4 H7 109.450
C1 C4 H8 111.055 C1 C5 H9 110.016
C1 C5 H10 109.450 C1 C5 H11 111.055
Br2 C1 H3 104.630 Br2 C1 C4 108.407
Br2 C1 C5 108.407 H3 C1 C4 111.126
H3 C1 C5 111.126 C4 C1 C5 112.747
H6 C4 H7 108.750 H6 C4 H8 108.719
H7 C4 H8 108.806 H9 C5 H10 108.750
H9 C5 H11 108.719 H10 C5 H11 108.806
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.341      
2 Br -0.081      
3 H 0.265      
4 C -0.611      
5 C -0.611      
6 H 0.233      
7 H 0.220      
8 H 0.237      
9 H 0.233      
10 H 0.220      
11 H 0.237      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.411 -2.015 0.000 2.056
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.815 -0.731 0.000
y -0.731 -36.744 0.000
z 0.000 0.000 -37.836
Traceless
 xyz
x -0.525 -0.731 0.000
y -0.731 1.081 0.000
z 0.000 0.000 -0.556
Polar
3z2-r2-1.112
x2-y2-1.070
xy-0.731
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.487 -0.404 0.000
y -0.404 8.464 0.000
z 0.000 0.000 6.138


<r2> (average value of r2) Å2
<r2> 155.275
(<r2>)1/2 12.461