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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-157.187250
Energy at 298.15K-157.195830
HF Energy-157.187250
Nuclear repulsion energy124.274561
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 B3PW91/6-311G*
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' 3218 3098 36.94      
2 A' 3140 3023 23.28      
3 A' 3129 3013 19.20      
4 A' 3096 2981 22.22      
5 A' 3028 2915 40.19      
6 A' 1526 1469 1.28      
7 A' 1512 1455 11.70      
8 A' 1435 1381 4.44      
9 A' 1401 1348 1.51      
10 A' 1246 1199 0.03      
11 A' 1217 1172 0.00      
12 A' 1054 1014 5.96      
13 A' 1007 969 14.01      
14 A' 947 911 3.55      
15 A' 804 774 6.20      
16 A' 778 749 2.52      
17 A' 363 350 0.20      
18 A" 3202 3082 0.28      
19 A" 3124 3007 32.39      
20 A" 3094 2979 35.79      
21 A" 1505 1449 3.11      
22 A" 1474 1419 4.43      
23 A" 1203 1158 0.80      
24 A" 1142 1100 0.10      
25 A" 1113 1071 5.41      
26 A" 1063 1023 2.01      
27 A" 885 852 8.44      
28 A" 824 793 5.82      
29 A" 343 330 0.84      
30 A" 222 214 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24046.0 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 23149.1 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 B3PW91/6-311G*
ABC
0.52300 0.21149 0.18578

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.345 0.401 0.000
C2 -0.877 1.284 0.000
H3 1.290 0.940 0.000
C4 0.345 -0.901 0.753
C5 0.345 -0.901 -0.753
H6 1.251 -1.204 1.267
H7 1.251 -1.204 -1.267
H8 -0.570 -1.192 1.261
H9 -0.570 -1.192 -1.261
H10 -1.795 0.688 0.000
H11 -0.904 1.929 0.885
H12 -0.904 1.929 -0.885

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50761.08791.50381.50382.23712.23712.22782.22782.15922.16252.1625
C21.50762.19422.61422.61423.51113.51112.79532.79531.09491.09501.0950
H31.08792.19422.20172.20172.49102.49103.09713.09713.09552.56402.5640
C41.50382.61422.20171.50631.08522.23491.08602.23102.76963.09573.4998
C51.50382.61422.20171.50632.23491.08522.23101.08602.76963.49983.0957
H62.23713.51112.49101.08522.23492.53431.82103.11553.80343.82214.3695
H72.23713.51112.49102.23491.08522.53433.11551.82103.80344.36953.8221
H82.22782.79533.09711.08602.23101.82103.11552.52152.57363.16093.8017
H92.22782.79533.09712.23101.08603.11551.82102.52152.57363.80173.1609
H102.15921.09493.09552.76962.76963.80343.80342.57362.57361.76561.7656
H112.16251.09502.56403.09573.49983.82214.36953.16093.80171.76561.7693
H122.16251.09502.56403.49983.09574.36953.82213.80173.16091.76561.7693

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 111.136 C1 C2 H11 111.398
C1 C2 H12 111.398 C1 C4 H5 59.946
C1 C4 H6 118.662 C1 C4 H8 117.777
C1 H5 C4 59.946 C1 H5 H7 118.662
C1 H5 H9 117.777 C2 C1 C3 114.454
C2 C1 C4 120.472 C2 C1 H5 120.472
C3 C1 C4 115.378 C3 C1 H5 115.378
C4 C1 H5 60.108 C4 H5 H7 118.273
C4 H5 H9 117.867 H5 C4 H6 118.273
H5 C4 H8 117.867 H6 C4 H8 114.015
H7 H5 H9 114.015 H10 C2 H11 107.466
H10 C2 H12 107.466 H11 C2 H12 107.780
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.230      
2 C -0.648      
3 H 0.215      
4 C -0.446      
5 C -0.446      
6 H 0.227      
7 H 0.227      
8 H 0.224      
9 H 0.224      
10 H 0.209      
11 H 0.223      
12 H 0.223      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.037 0.109 0.000 0.115
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.204 0.252 0.000
y 0.252 -27.350 0.000
z 0.000 0.000 -27.064
Traceless
 xyz
x 2.003 0.252 0.000
y 0.252 -1.216 0.000
z 0.000 0.000 -0.787
Polar
3z2-r2-1.574
x2-y22.146
xy0.252
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.186 -0.464 0.000
y -0.464 6.823 0.000
z 0.000 0.000 6.320


<r2> (average value of r2) Å2
<r2> 83.529
(<r2>)1/2 9.139