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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-156.981410
Energy at 298.15K-156.989873
HF Energy-156.981410
Nuclear repulsion energy123.442945
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 PBEPBEultrafine/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' 3164 3112 27.12      
2 A' 3081 3030 11.42      
3 A' 3078 3027 25.83      
4 A' 3042 2992 17.96      
5 A' 2971 2922 35.74      
6 A' 1490 1466 1.08      
7 A' 1481 1456 7.64      
8 A' 1402 1379 2.75      
9 A' 1368 1346 3.22      
10 A' 1218 1198 0.13      
11 A' 1189 1170 0.08      
12 A' 1029 1012 5.40      
13 A' 987 971 11.02      
14 A' 923 908 3.57      
15 A' 787 774 5.66      
16 A' 757 744 0.82      
17 A' 354 348 0.22      
18 A" 3150 3098 0.35      
19 A" 3074 3024 25.76      
20 A" 3041 2991 29.27      
21 A" 1474 1450 2.05      
22 A" 1444 1421 1.76      
23 A" 1170 1151 0.55      
24 A" 1111 1093 0.23      
25 A" 1085 1067 4.91      
26 A" 1031 1014 2.03      
27 A" 866 852 5.83      
28 A" 796 783 4.88      
29 A" 329 324 0.80      
30 A" 223 220 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23558.8 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 23170.1 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 PBEPBEultrafine/6-31G*
ABC
0.51554 0.20902 0.18363

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.405 0.000
C2 -0.882 1.290 0.000
H3 1.300 0.950 0.000
C4 0.347 -0.906 0.758
C5 0.347 -0.906 -0.758
H6 1.260 -1.212 1.278
H7 1.260 -1.212 -1.278
H8 -0.577 -1.198 1.269
H9 -0.577 -1.198 -1.269
H10 -1.805 0.683 0.000
H11 -0.912 1.941 0.893
H12 -0.912 1.941 -0.893

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51481.09751.51411.51412.25472.25472.24342.24342.16982.17772.1777
C21.51482.20832.62832.62833.53363.53362.80962.80961.10491.10501.1050
H31.09752.20832.21942.21942.51242.51243.12163.12163.11612.58332.5833
C41.51412.62832.21941.51541.09462.25231.09562.24642.77993.11583.5233
C51.51412.62832.21941.51542.25231.09462.24641.09562.77993.52333.1158
H62.25473.53362.51241.09462.25232.55691.83673.14053.82333.84844.4018
H72.25473.53362.51242.25231.09462.55693.14051.83673.82334.40183.8484
H82.24342.80963.12161.09562.24641.83673.14052.53802.57953.17863.8256
H92.24342.80963.12162.24641.09563.14051.83672.53802.57953.82563.1786
H102.16981.10493.11612.77992.77993.82333.82332.57952.57951.78211.7821
H112.17771.10502.58333.11583.52333.84844.40183.17863.82561.78211.7856
H122.17771.10502.58333.52333.11584.40183.84843.82563.17861.78211.7856

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.869 C1 C2 H11 111.494
C1 C2 H12 111.494 C1 C4 H5 59.972
C1 C4 H6 118.722 C1 C4 H8 117.659
C1 H5 C4 59.972 C1 H5 H7 118.722
C1 H5 H9 117.659 C2 C1 C3 114.468
C2 C1 C4 120.396 C2 C1 H5 120.396
C3 C1 C4 115.460 C3 C1 H5 115.460
C4 C1 H5 60.057 C4 H5 H7 118.406
C4 H5 H9 117.820 H5 C4 H6 118.406
H5 C4 H8 117.820 H6 C4 H8 113.988
H7 H5 H9 113.988 H10 C2 H11 107.497
H10 C2 H12 107.497 H11 C2 H12 107.796
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.102      
2 C -0.489      
3 H 0.150      
4 C -0.333      
5 C -0.333      
6 H 0.159      
7 H 0.159      
8 H 0.158      
9 H 0.158      
10 H 0.152      
11 H 0.160      
12 H 0.160      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.024 0.104 0.000 0.107
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.964 0.170 0.000
y 0.170 -26.910 0.000
z 0.000 0.000 -26.707
Traceless
 xyz
x 1.844 0.170 0.000
y 0.170 -1.075 0.000
z 0.000 0.000 -0.769
Polar
3z2-r2-1.538
x2-y21.946
xy0.170
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.987 -0.444 0.000
y -0.444 6.440 0.000
z 0.000 0.000 5.987


<r2> (average value of r2) Å2
<r2> 84.153
(<r2>)1/2 9.173