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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: HF/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/cc-pVDZ
 hartrees
Energy at 0K-156.107230
Energy at 298.15K-156.116059
HF Energy-156.107230
Nuclear repulsion energy124.427869
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 HF/cc-pVDZ
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' 3368 3058 37.39      
2 A' 3291 2988 19.64      
3 A' 3277 2976 24.65      
4 A' 3241 2942 25.19      
5 A' 3169 2877 44.21      
6 A' 1635 1485 1.41      
7 A' 1595 1449 7.35      
8 A' 1542 1400 1.82      
9 A' 1491 1354 2.80      
10 A' 1318 1197 0.07      
11 A' 1293 1174 0.01      
12 A' 1161 1055 2.68      
13 A' 1064 966 9.20      
14 A' 1006 914 3.59      
15 A' 847 769 5.44      
16 A' 820 744 4.42      
17 A' 389 353 0.19      
18 A" 3351 3043 0.28      
19 A" 3268 2967 30.82      
20 A" 3237 2939 43.12      
21 A" 1587 1441 1.62      
22 A" 1563 1419 1.97      
23 A" 1289 1170 0.29      
24 A" 1245 1131 0.55      
25 A" 1194 1084 4.40      
26 A" 1177 1069 0.42      
27 A" 940 853 12.21      
28 A" 878 797 5.29      
29 A" 366 332 0.53      
30 A" 241 219 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25420.7 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 23082.0 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 HF/cc-pVDZ
ABC
0.52489 0.21168 0.18601

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.345 0.398 0.000
C2 -0.878 1.285 0.000
H3 1.286 0.938 0.000
C4 0.345 -0.900 0.752
C5 0.345 -0.900 -0.752
H6 1.250 -1.202 1.263
H7 1.250 -1.202 -1.263
H8 -0.568 -1.192 1.258
H9 -0.568 -1.192 -1.258
H10 -1.795 0.690 0.000
H11 -0.898 1.928 0.884
H12 -0.898 1.928 -0.884

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51111.08501.49981.49982.23072.23072.22352.22352.15932.16052.1605
C21.51112.19232.61452.61453.50913.50912.79572.79571.09271.09311.0931
H31.08502.19232.19702.19702.48492.48493.09113.09113.09082.55642.5564
C41.49982.61452.19701.50401.08292.22991.08372.22692.76953.09173.4953
C51.49982.61452.19701.50402.22991.08292.22691.08372.76953.49533.0917
H62.23073.50912.48491.08292.22992.52651.81813.10853.80103.81554.3617
H72.23073.50912.48492.22991.08292.52653.10851.81813.80104.36173.8155
H82.22352.79573.09111.08372.22691.81813.10852.51632.57493.15973.7990
H92.22352.79573.09112.22691.08373.10851.81812.51632.57493.79903.1597
H102.15931.09273.09082.76952.76953.80103.80102.57492.57491.76551.7655
H112.16051.09312.55643.09173.49533.81554.36173.15973.79901.76551.7680
H122.16051.09312.55643.49533.09174.36173.81553.79903.15971.76551.7680

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 111.038 C1 C2 H11 111.107
C1 C2 H12 111.107 C1 C4 H5 59.908
C1 C4 H6 118.578 C1 C4 H8 117.878
C1 H5 C4 59.908 C1 H5 H7 118.578
C1 H5 H9 117.878 C2 C1 C3 114.229
C2 C1 C4 120.531 C2 C1 H5 120.531
C3 C1 C4 115.481 C3 C1 H5 115.481
C4 C1 H5 60.184 C4 H5 H7 118.171
C4 H5 H9 117.842 H5 C4 H6 118.171
H5 C4 H8 117.842 H6 C4 H8 114.095
H7 H5 H9 114.095 H10 C2 H11 107.748
H10 C2 H12 107.748 H11 C2 H12 107.937
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.205      
2 C 0.027      
3 H 0.022      
4 C -0.044      
5 C -0.044      
6 H 0.041      
7 H 0.041      
8 H 0.038      
9 H 0.038      
10 H 0.020      
11 H 0.033      
12 H 0.033      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.025 0.134 0.000 0.136
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.593 0.260 0.000
y 0.260 -27.550 0.000
z 0.000 0.000 -27.302
Traceless
 xyz
x 1.833 0.260 0.000
y 0.260 -1.103 0.000
z 0.000 0.000 -0.730
Polar
3z2-r2-1.460
x2-y21.957
xy0.260
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.903 -0.400 0.000
y -0.400 6.451 0.000
z 0.000 0.000 6.051


<r2> (average value of r2) Å2
<r2> 83.579
(<r2>)1/2 9.142