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 C4H8 (methylcyclopropane)

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-157.212032
Energy at 298.15K-157.220606
HF Energy-157.212032
Nuclear repulsion energy123.869496
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/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' 3225 3097 33.14      
2 A' 3146 3021 10.90      
3 A' 3142 3017 29.34      
4 A' 3101 2978 21.49      
5 A' 3037 2916 36.05      
6 A' 1541 1479 0.70      
7 A' 1530 1469 6.45      
8 A' 1452 1394 2.08      
9 A' 1415 1359 3.94      
10 A' 1247 1197 0.12      
11 A' 1222 1174 0.05      
12 A' 1069 1027 6.52      
13 A' 1007 967 6.43      
14 A' 952 914 3.84      
15 A' 803 771 3.83      
16 A' 774 743 2.69      
17 A' 365 351 0.19      
18 A" 3211 3083 0.33      
19 A" 3138 3013 27.79      
20 A" 3098 2975 34.63      
21 A" 1523 1463 1.61      
22 A" 1497 1437 1.09      
23 A" 1211 1163 0.39      
24 A" 1156 1110 0.35      
25 A" 1121 1077 4.24      
26 A" 1082 1039 1.28      
27 A" 878 843 6.67      
28 A" 827 794 4.95      
29 A" 342 328 0.65      
30 A" 226 217 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24167.3 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 23207.8 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 B3LYP/6-31G*
ABC
0.51987 0.20989 0.18434

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.346 0.402 0.000
C2 -0.880 1.291 0.000
H3 1.291 0.944 0.000
C4 0.346 -0.904 0.756
C5 0.346 -0.904 -0.756
H6 1.253 -1.209 1.272
H7 1.253 -1.209 -1.272
H8 -0.569 -1.197 1.265
H9 -0.569 -1.197 -1.265
H10 -1.799 0.691 0.000
H11 -0.906 1.936 0.887
H12 -0.906 1.936 -0.887

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51451.08951.50911.50912.24372.24372.23472.23472.16442.16972.1697
C21.51452.19882.62542.62543.52343.52342.80772.80771.09691.09721.0972
H31.08952.19882.20932.20932.50082.50083.10573.10573.10032.56852.5685
C41.50912.62542.20931.51161.08692.24221.08772.23742.77803.10693.5119
C51.50912.62542.20931.51162.24221.08692.23741.08772.77803.51193.1069
H62.24373.52342.50081.08692.24222.54431.82253.12363.81323.83384.3829
H72.24373.52342.50082.24221.08692.54433.12361.82253.81324.38293.8338
H82.23472.80773.10571.08772.23741.82253.12362.52922.58363.17363.8154
H92.23472.80773.10572.23741.08773.12361.82252.52922.58363.81543.1736
H102.16441.09693.10032.77802.77803.81323.81322.58362.58361.77031.7703
H112.16971.09722.56853.10693.51193.83384.38293.17363.81541.77031.7734
H122.16971.09722.56853.51193.10694.38293.83383.81543.17361.77031.7734

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.948 C1 C2 H11 111.356
C1 C2 H12 111.356 C1 C4 H5 59.946
C1 C4 H6 118.698 C1 C4 H8 117.848
C1 H5 C4 59.946 C1 H5 H7 118.698
C1 H5 H9 117.848 C2 C1 C3 114.227
C2 C1 C4 120.520 C2 C1 H5 120.520
C3 C1 C4 115.517 C3 C1 H5 115.517
C4 C1 H5 60.108 C4 H5 H7 118.365
C4 H5 H9 117.892 H5 C4 H6 118.365
H5 C4 H8 117.892 H6 C4 H8 113.878
H7 H5 H9 113.878 H10 C2 H11 107.582
H10 C2 H12 107.582 H11 C2 H12 107.838
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.083      
2 C -0.447      
3 H 0.136      
4 C -0.311      
5 C -0.311      
6 H 0.147      
7 H 0.147      
8 H 0.146      
9 H 0.146      
10 H 0.139      
11 H 0.145      
12 H 0.145      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.028 0.104 0.000 0.108
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.110 0.200 0.000
y 0.200 -26.970 0.000
z 0.000 0.000 -26.751
Traceless
 xyz
x 1.751 0.200 0.000
y 0.200 -1.040 0.000
z 0.000 0.000 -0.711
Polar
3z2-r2-1.421
x2-y21.861
xy0.200
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.830 -0.399 0.000
y -0.399 6.269 0.000
z 0.000 0.000 5.865


<r2> (average value of r2) Å2
<r2> 83.841
(<r2>)1/2 9.156