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: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-2690.390474
Energy at 298.15K-2690.400910
HF Energy-2690.390474
Nuclear repulsion energy251.220541
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 mPW1PW91/6-31G**
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' 3183 3028 19.53      
2 A' 3157 3004 27.08      
3 A' 3139 2987 0.93      
4 A' 3071 2922 25.58      
5 A' 1520 1446 7.03      
6 A' 1506 1433 9.59      
7 A' 1432 1363 5.44      
8 A' 1263 1201 44.19      
9 A' 1190 1132 32.45      
10 A' 1063 1011 10.39      
11 A' 908 863 7.23      
12 A' 551 524 17.84      
13 A' 404 384 1.75      
14 A' 297 282 2.38      
15 A' 262 249 0.74      
16 A" 3179 3025 8.94      
17 A" 3150 2997 2.05      
18 A" 3067 2918 11.34      
19 A" 1498 1425 0.43      
20 A" 1493 1421 2.56      
21 A" 1421 1353 13.36      
22 A" 1366 1299 0.51      
23 A" 1165 1108 1.14      
24 A" 960 913 0.03      
25 A" 945 900 1.99      
26 A" 286 272 0.73      
27 A" 240 228 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 20855.6 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 19844.2 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 mPW1PW91/6-31G**
ABC
0.26815 0.09714 0.07646

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.451 -0.905 0.000
Br2 -0.065 1.006 0.000
H3 1.541 -0.865 0.000
C4 -0.065 -1.549 1.270
C5 -0.065 -1.549 -1.270
H6 -1.157 -1.522 1.302
H7 0.254 -2.597 1.304
H8 0.317 -1.043 2.157
H9 -1.157 -1.522 -1.302
H10 0.254 -2.597 -1.304
H11 0.317 -1.043 -2.157

Atom - Atom Distances (Å)
  C1 Br2 H3 C4 C5 H6 H7 H8 H9 H10 H11
C11.98011.09071.51441.51442.15892.14472.16542.15892.14472.1654
Br21.98012.46612.85342.85343.04613.84472.99963.04613.84472.9996
H31.09072.46612.15902.15903.06692.52122.48643.06692.52122.4864
C41.51442.85342.15902.53921.09231.09531.09082.79352.79693.4848
C51.51442.85342.15902.53922.79352.79693.48481.09231.09531.0908
H62.15893.04613.06691.09232.79351.77311.77022.60343.15193.7900
H72.14473.84472.52121.09532.79691.77311.77333.15192.60843.7943
H82.16542.99962.48641.09083.48481.77021.77333.79003.79434.3138
H92.15893.04613.06692.79351.09232.60343.15193.79001.77311.7702
H102.14473.84472.52122.79691.09533.15192.60843.79431.77311.7733
H112.16542.99962.48643.48481.09083.79003.79434.31381.77021.7733

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 110.792 C1 C4 H7 109.487
C1 C4 H8 111.409 C1 C5 H9 110.792
C1 C5 H10 109.487 C1 C5 H11 111.409
Br2 C1 H3 102.993 Br2 C1 C4 108.754
Br2 C1 C5 108.754 H3 C1 C4 110.894
H3 C1 C5 110.894 C4 C1 C5 113.937
H6 C4 H7 108.296 H6 C4 H8 108.355
H7 C4 H8 108.416 H9 C5 H10 108.296
H9 C5 H11 108.355 H10 C5 H11 108.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.155      
2 Br -0.160      
3 H 0.178      
4 C -0.379      
5 C -0.379      
6 H 0.153      
7 H 0.138      
8 H 0.156      
9 H 0.153      
10 H 0.138      
11 H 0.156      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.453 -2.249 0.000 2.294
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.825 -0.695 0.000
y -0.695 -36.808 0.000
z 0.000 0.000 -37.769
Traceless
 xyz
x -0.536 -0.695 0.000
y -0.695 0.989 0.000
z 0.000 0.000 -0.453
Polar
3z2-r2-0.906
x2-y2-1.017
xy-0.695
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.031 -0.356 0.000
y -0.356 9.095 0.000
z 0.000 0.000 6.775


<r2> (average value of r2) Å2
<r2> 155.837
(<r2>)1/2 12.483