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 CH3CHCH3 (Isopropyl radical)

using model chemistry: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-117.834969
Energy at 298.15K-117.841118
HF Energy-117.834969
Nuclear repulsion energy75.099769
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 B3LYP/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' 3185 3064 25.82      
2 A' 3101 2983 15.59      
3 A' 3039 2924 43.72      
4 A' 2962 2850 44.61      
5 A' 1562 1502 5.55      
6 A' 1550 1491 15.71      
7 A' 1468 1412 5.85      
8 A' 1213 1166 6.84      
9 A' 1070 1030 2.30      
10 A' 869 836 1.61      
11 A' 395 380 9.57      
12 A' 347 334 22.28      
13 A' 117 113 0.55      
14 A" 3102 2984 26.31      
15 A" 3037 2921 6.67      
16 A" 2957 2845 16.96      
17 A" 1548 1489 1.99      
18 A" 1537 1479 0.67      
19 A" 1451 1395 4.49      
20 A" 1396 1343 8.29      
21 A" 1133 1090 0.80      
22 A" 987 949 1.49      
23 A" 978 941 0.53      
24 A" 119 115 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 19560.5 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 18817.2 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 B3LYP/3-21G*
ABC
1.22831 0.27645 0.24666

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.010 0.545 0.000
C2 -0.010 -0.202 1.301
C3 -0.010 -0.202 -1.301
H4 0.224 1.605 0.000
H5 -0.762 -1.003 1.294
H6 -0.762 -1.003 -1.294
H7 0.964 -0.686 1.494
H8 -0.220 0.460 2.149
H9 0.964 -0.686 -1.494
H10 -0.220 0.460 -2.149

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.50011.50011.08562.15402.15402.16732.16052.16732.1605
C21.50012.60192.23881.09932.81851.10531.09532.99923.5187
C31.50012.60192.23882.81851.09932.99923.51871.10531.0953
H41.08562.23882.23883.07483.07482.83332.47512.83332.4751
H52.15401.09932.81853.07482.58871.76691.77923.29493.7803
H62.15402.81851.09933.07482.58873.29493.78031.76691.7792
H72.16731.10532.99922.83331.76693.29491.77272.98773.9977
H82.16051.09533.51872.47511.77923.78031.77273.99774.2974
H92.16732.99921.10532.83333.29491.76692.98773.99771.7727
H102.16053.51871.09532.47513.78031.77923.99774.29741.7727

picture of Isopropyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.978 C1 C2 H7 111.682
C1 C2 H8 111.753 C1 C3 H6 110.978
C1 C3 H9 111.682 C1 C3 H10 111.753
C2 C1 C3 120.279 C2 C1 H4 119.084
C3 C1 H4 119.084 H5 C2 H7 106.538
H5 C2 H8 108.331 H6 C3 H9 106.538
H6 C3 H10 108.331 H7 C2 H8 107.322
H9 C3 H10 107.322
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.150      
2 C -0.597      
3 C -0.597      
4 H 0.176      
5 H 0.194      
6 H 0.194      
7 H 0.194      
8 H 0.195      
9 H 0.194      
10 H 0.195      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.189 -0.137 0.000 0.234
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.506 0.329 0.000
y 0.329 -20.325 0.000
z 0.000 0.000 -20.244
Traceless
 xyz
x -1.221 0.329 0.000
y 0.329 0.550 0.000
z 0.000 0.000 0.671
Polar
3z2-r21.342
x2-y2-1.181
xy0.329
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.603 0.064 0.000
y 0.064 4.500 0.000
z 0.000 0.000 5.216


<r2> (average value of r2) Å2
<r2> 61.677
(<r2>)1/2 7.853