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 C(CH3)3 (Tert-butyl radical)

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A"
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-157.575257
Energy at 298.15K-157.583771
HF Energy-157.409446
Nuclear repulsion energy125.210243
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 B2PLYP/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3094 2937 48.48      
2 A1 2999 2847 65.45      
3 A1 1540 1461 15.75      
4 A1 1473 1399 1.10      
5 A1 1131 1074 0.01      
6 A1 775 735 0.78      
7 A1 264 251 3.39      
8 A2 3136 2976 0.00      
9 A2 1524 1446 0.00      
10 A2 994 943 0.00      
11 A2 146 139 0.00      
12 E 3141 2981 47.99      
12 E 3141 2981 48.00      
13 E 3091 2934 17.09      
13 E 3091 2934 17.06      
14 E 2991 2839 30.73      
14 E 2991 2839 30.72      
15 E 1546 1467 2.54      
15 E 1546 1467 2.54      
16 E 1522 1445 2.54      
16 E 1522 1445 2.54      
17 E 1448 1374 2.78      
17 E 1448 1374 2.78      
18 E 1330 1262 6.15      
18 E 1330 1262 6.16      
19 E 1034 981 2.21      
19 E 1034 981 2.21      
20 E 964 915 0.40      
20 E 964 915 0.40      
21 E 383 363 0.07      
21 E 383 363 0.07      
22 E 142 135 0.00      
22 E 142 135 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26127.0 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 24799.7 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 B2PLYP/6-31G*
ABC
0.26644 0.26644 0.14462

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.162
C2 0.000 1.485 -0.017
C3 1.286 -0.743 -0.017
C4 -1.286 -0.743 -0.017
H5 0.000 1.772 -1.083
H6 1.534 -0.886 -1.083
H7 -1.534 -0.886 -1.083
H8 -0.887 1.945 0.431
H9 0.887 1.945 0.431
H10 2.128 -0.204 0.431
H11 1.241 -1.741 0.431
H12 -1.241 -1.741 0.431
H13 -2.128 -0.204 0.431

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
C11.49621.49621.49622.16572.16572.16572.15482.15482.15482.15482.15482.1548
C21.49622.57282.57281.10383.01883.01881.09511.09512.75423.48573.48572.7542
C31.49622.57282.57283.01881.10383.01883.48572.75421.09511.09512.75423.4857
C41.49622.57282.57283.01883.01881.10382.75423.48573.48572.75421.09511.0951
H52.16571.10383.01883.01883.06873.06871.76341.76343.27524.02134.02133.2752
H62.16573.01881.10383.01883.06873.06874.02133.27521.76341.76343.27524.0213
H72.16573.01883.01881.10383.06873.06873.27524.02134.02133.27521.76341.7634
H82.15481.09513.48572.75421.76344.02133.27521.77423.70324.25653.70322.4823
H92.15481.09512.75423.48571.76343.27524.02131.77422.48233.70324.25653.7032
H102.15482.75421.09513.48573.27521.76344.02133.70322.48231.77423.70324.2565
H112.15483.48571.09512.75424.02131.76343.27524.25653.70321.77422.48233.7032
H122.15483.48572.75421.09514.02133.27521.76343.70324.25653.70322.48231.7742
H132.15482.75423.48571.09513.27524.02131.76342.48233.70324.25653.70321.7742

picture of Tert-butyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 111.921 C1 C2 H8 111.584
C1 C2 H9 111.584 C1 C3 H6 111.921
C1 C3 H10 111.584 C1 C3 H11 111.584
C1 C4 H7 111.921 C1 C4 H12 111.584
C1 C4 H13 111.584 C2 C1 C3 118.583
C2 C1 C4 118.583 C3 C1 C4 118.583
H5 C2 H8 106.632 H5 C2 H9 106.632
H6 C3 H10 106.632 H6 C3 H11 106.632
H7 C4 H12 106.632 H7 C4 H13 106.632
H8 C2 H9 108.206 H10 C3 H11 108.206
H12 C4 H13 108.206
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.100      
2 C -0.492      
3 C -0.492      
4 C -0.492      
5 H 0.150      
6 H 0.150      
7 H 0.150      
8 H 0.154      
9 H 0.154      
10 H 0.154      
11 H 0.154      
12 H 0.154      
13 H 0.154      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.758 0.000 0.000
y 0.000 6.758 0.000
z 0.000 0.000 5.341


<r2> (average value of r2) Å2
<r2> 98.550
(<r2>)1/2 9.927