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 C5H11 (2-Methylbut-2-yl radical)

using model chemistry: BLYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at BLYP/3-21G*
 hartrees
Energy at 0K-195.898461
Energy at 298.15K-195.908968
Nuclear repulsion energy179.372114
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 BLYP/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 3045 3026 40.92      
2 A 3032 3012 42.79      
3 A 3015 2995 37.59      
4 A 3012 2992 21.66      
5 A 2988 2968 10.26      
6 A 2973 2953 33.50      
7 A 2969 2949 29.79      
8 A 2961 2942 22.62      
9 A 2894 2876 44.75      
10 A 2863 2845 54.54      
11 A 2854 2835 34.07      
12 A 1535 1525 3.74      
13 A 1532 1522 5.07      
14 A 1524 1514 4.71      
15 A 1516 1506 5.52      
16 A 1510 1501 4.92      
17 A 1501 1491 3.89      
18 A 1501 1491 0.59      
19 A 1432 1423 1.09      
20 A 1414 1405 2.83      
21 A 1409 1400 2.41      
22 A 1345 1336 2.23      
23 A 1306 1298 3.44      
24 A 1256 1247 9.09      
25 A 1221 1213 3.82      
26 A 1080 1073 5.33      
27 A 1045 1038 6.17      
28 A 1020 1014 2.10      
29 A 985 979 1.12      
30 A 971 965 1.16      
31 A 954 947 0.88      
32 A 890 885 0.09      
33 A 784 778 3.64      
34 A 696 691 1.05      
35 A 422 419 1.39      
36 A 371 369 0.04      
37 A 333 331 1.34      
38 A 232 230 0.09      
39 A 187 186 2.08      
40 A 128 127 0.01      
41 A 97 96 0.15      
42 A 31 30 0.22      

Unscaled Zero Point Vibrational Energy (zpe) 31414.8 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 31210.6 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 BLYP/3-21G*
ABC
0.22392 0.11144 0.08533

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.875 1.456 0.014
H2 0.007 2.106 -0.120
H3 -1.600 1.686 -0.788
H4 -1.354 1.749 0.976
C5 2.051 -0.041 -0.372
H6 2.063 1.046 -0.559
H7 3.013 -0.325 0.088
H8 1.952 -0.558 -1.340
C9 0.855 -0.423 0.572
H10 0.872 -1.514 0.740
H11 1.028 0.062 1.556
C12 -0.495 -0.010 0.009
C13 -1.589 -1.037 -0.194
H14 -1.171 -2.031 -0.427
H15 -2.223 -1.152 0.716
H16 -2.269 -0.741 -1.015

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 H7 H8 C9 H10 H11 C12 C13 H14 H15 H16
C11.10391.10531.11443.30923.02164.27733.72562.61423.52152.81801.51462.60083.52723.01852.7972
H21.10391.79051.78362.97472.35473.87153.51662.75513.81982.83312.17863.52524.31254.03553.7526
H31.10531.79051.78234.06063.72635.10854.23813.51084.32343.87802.17612.78703.75963.27222.5277
H41.11441.78361.78234.07623.81174.91564.64933.12423.95712.97542.18403.03054.03653.03983.3166
C53.30922.97474.06064.07621.10241.10361.10171.57032.19012.18552.57433.77803.78804.54794.4230
H63.02162.35473.72633.81171.10241.78871.78712.21203.10762.55212.82514.21994.46624.98254.7080
H74.27733.87155.10854.91561.10361.78871.79392.21362.53402.49973.52304.66534.54825.33785.4116
H83.72563.51664.23814.64931.10171.78711.79392.20772.53103.10262.84703.75253.57194.69124.2372
C92.61422.75513.51083.12421.57032.21202.21362.20771.10421.11131.51972.63382.77343.16643.5179
H103.52153.81984.32343.95712.19013.10762.53402.53101.10421.78162.16002.67582.41013.11623.6804
H112.81802.83313.87802.97542.18552.55212.49973.10261.11131.78162.17233.33433.62673.57014.2569
C121.51462.17862.17612.18402.57432.82513.52302.84701.51972.16002.17231.51372.17522.18862.1742
C132.60083.52522.78703.03053.77804.21994.66533.75252.63382.67583.33431.51371.10381.11491.1060
H143.52724.31253.75964.03653.78804.46624.54823.57192.77342.41013.62672.17521.10381.78461.7929
H153.01854.03553.27223.03984.54794.98255.33784.69123.16643.11623.57012.18861.11491.78461.7797
H162.79723.75262.52773.31664.42304.70805.41164.23723.51793.68044.25692.17421.10601.79291.7797

picture of 2-Methylbut-2-yl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C12 C9 118.976 C1 C12 C13 118.372
H2 C1 H3 108.283 H2 C1 H4 107.038
H2 C1 C12 111.649 H3 C1 H4 106.830
H3 C1 C12 111.362 H4 C1 C12 111.442
C5 C9 H10 108.687 C5 C9 H11 107.942
C5 C9 C12 112.828 H6 C5 H7 108.352
H6 C5 H8 108.349 H6 C5 C9 110.489
H7 C5 H8 108.863 H7 C5 C9 110.539
H8 C5 C9 110.187 C9 C12 C13 120.512
H10 C9 H11 107.056 H10 C9 C12 109.799
H11 C9 C12 110.341 C12 C13 H14 111.449
C12 C13 H15 111.842 C12 C13 H16 111.233
H14 C13 H15 107.101 H14 C13 H16 108.456
H15 C13 H16 106.521
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.566      
2 H 0.183      
3 H 0.179      
4 H 0.177      
5 C -0.508      
6 H 0.176      
7 H 0.169      
8 H 0.178      
9 C -0.403      
10 H 0.174      
11 H 0.175      
12 C 0.090      
13 C -0.563      
14 H 0.179      
15 H 0.178      
16 H 0.179      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.095 0.011 0.163 0.189
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.878 -0.028 0.339
y -0.028 -33.580 0.049
z 0.339 0.049 -34.659
Traceless
 xyz
x 0.242 -0.028 0.339
y -0.028 0.688 0.049
z 0.339 0.049 -0.930
Polar
3z2-r2-1.860
x2-y2-0.298
xy-0.028
xz0.339
yz0.049


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


<r2> (average value of r2) Å2
<r2> 158.725
(<r2>)1/2 12.599