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: BLYP/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/TZVP
 hartrees
Energy at 0K-157.164536
Energy at 298.15K-157.173015
HF Energy-157.164536
Nuclear repulsion energy123.313393
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/TZVP
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' 3133 3125 31.65      
2 A' 3054 3047 20.49      
3 A' 3050 3042 17.05      
4 A' 3003 2995 22.62      
5 A' 2946 2939 40.07      
6 A' 1472 1468 1.26      
7 A' 1468 1464 7.99      
8 A' 1387 1383 3.04      
9 A' 1361 1357 3.36      
10 A' 1195 1192 0.01      
11 A' 1175 1173 0.03      
12 A' 1013 1010 13.50      
13 A' 965 962 3.56      
14 A' 918 916 3.77      
15 A' 777 775 2.25      
16 A' 738 736 5.24      
17 A' 361 360 0.19      
18 A" 3117 3109 0.31      
19 A" 3047 3039 31.25      
20 A" 2996 2989 34.33      
21 A" 1461 1457 2.17      
22 A" 1440 1437 2.25      
23 A" 1167 1164 0.80      
24 A" 1109 1106 0.03      
25 A" 1079 1077 3.94      
26 A" 1036 1033 1.84      
27 A" 825 823 5.55      
28 A" 803 801 7.70      
29 A" 337 336 0.73      
30 A" 218 218 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23325.6 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 23267.3 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/TZVP
ABC
0.51532 0.20783 0.18240

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.403 0.000
C2 -0.882 1.299 0.000
H3 1.296 0.943 0.000
C4 0.347 -0.910 0.761
C5 0.347 -0.910 -0.761
H6 1.256 -1.215 1.277
H7 1.256 -1.215 -1.277
H8 -0.572 -1.202 1.268
H9 -0.572 -1.202 -1.268
H10 -1.806 0.703 0.000
H11 -0.904 1.947 0.889
H12 -0.904 1.947 -0.889

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.52051.09181.51791.51792.25322.25322.24302.24302.17352.17662.1766
C21.52052.20662.63982.63983.53873.53872.82142.82141.09961.10021.1002
H31.09182.20662.21682.21682.50812.50813.11463.11463.11112.57652.5765
C41.51792.63982.21681.52151.08902.25181.08982.24672.79563.12153.5283
C51.51792.63982.21681.52152.25181.08902.24671.08982.79563.52833.1215
H62.25323.53872.50811.08902.25182.55331.82843.13373.83223.84924.3995
H72.25323.53872.50812.25181.08902.55333.13371.82843.83224.39953.8492
H82.24302.82143.11461.08982.24671.82843.13372.53692.60003.18903.8315
H92.24302.82143.11462.24671.08983.13371.82842.53692.60003.83153.1890
H102.17351.09963.11112.79562.79563.83223.83222.60002.60001.77501.7750
H112.17661.10022.57653.12153.52833.84924.39953.18903.83151.77501.7779
H122.17661.10022.57653.52833.12154.39953.84923.83153.18901.77501.7779

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 111.088 C1 C2 H11 111.302
C1 C2 H12 111.302 C1 C4 H5 59.922
C1 C4 H6 118.682 C1 C4 H8 117.731
C1 H5 C4 59.922 C1 H5 H7 118.682
C1 H5 H9 117.731 C2 C1 C3 114.281
C2 C1 C4 120.644 C2 C1 H5 120.644
C3 C1 C4 115.331 C3 C1 H5 115.331
C4 C1 H5 60.156 C4 H5 H7 118.276
C4 H5 H9 117.765 H5 C4 H6 118.276
H5 C4 H8 117.765 H6 C4 H8 114.099
H7 H5 H9 114.099 H10 C2 H11 107.583
H10 C2 H12 107.583 H11 C2 H12 107.803
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.087      
2 C -0.336      
3 H 0.145      
4 C -0.290      
5 C -0.290      
6 H 0.135      
7 H 0.135      
8 H 0.129      
9 H 0.129      
10 H 0.100      
11 H 0.116      
12 H 0.116      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.034 0.141 0.000 0.145
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.985 0.224 0.000
y 0.224 -27.965 0.000
z 0.000 0.000 -27.732
Traceless
 xyz
x 1.864 0.224 0.000
y 0.224 -1.106 0.000
z 0.000 0.000 -0.757
Polar
3z2-r2-1.515
x2-y21.980
xy0.224
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.866 -0.525 0.000
y -0.525 7.702 0.000
z 0.000 0.000 7.123


<r2> (average value of r2) Å2
<r2> 85.075
(<r2>)1/2 9.224