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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B2PLYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/3-21G*
 hartrees
Energy at 0K-156.083274
Energy at 298.15K-156.091913
HF Energy-155.962269
Nuclear repulsion energy123.571873
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 B2PLYP/3-21G*
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' 3281 3281 18.76      
2 A' 3205 3205 11.68      
3 A' 3189 3189 8.45      
4 A' 3127 3127 20.71      
5 A' 3065 3065 25.95      
6 A' 1588 1588 7.40      
7 A' 1556 1556 2.73      
8 A' 1487 1487 4.39      
9 A' 1425 1425 1.34      
10 A' 1258 1258 0.24      
11 A' 1204 1204 0.04      
12 A' 1103 1103 22.52      
13 A' 1010 1010 0.06      
14 A' 956 956 7.05      
15 A' 816 816 0.96      
16 A' 764 764 7.12      
17 A' 373 373 0.17      
18 A" 3265 3265 0.16      
19 A" 3183 3183 15.84      
20 A" 3126 3126 26.99      
21 A" 1581 1581 2.15      
22 A" 1538 1538 3.80      
23 A" 1229 1229 0.65      
24 A" 1195 1195 1.09      
25 A" 1153 1153 7.21      
26 A" 1126 1126 1.75      
27 A" 869 869 0.47      
28 A" 839 839 13.63      
29 A" 354 354 1.17      
30 A" 225 225 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24544.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 24544.1 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 B2PLYP/3-21G*
ABC
0.51012 0.21044 0.18462

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.355 0.419 0.000
C2 -0.902 1.270 0.000
H3 1.287 0.972 0.000
C4 0.355 -0.899 0.765
C5 0.355 -0.899 -0.765
H6 1.264 -1.200 1.269
H7 1.264 -1.200 -1.269
H8 -0.561 -1.180 1.267
H9 -0.561 -1.180 -1.267
H10 -1.792 0.633 0.000
H11 -0.942 1.909 0.888
H12 -0.942 1.909 -0.888

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51821.08371.52391.52392.24842.24842.23682.23682.15842.16662.1666
C21.51822.20902.62122.62123.52163.52162.77932.77931.09491.09481.0948
H31.08372.20902.22622.22622.51552.51553.10743.10743.09802.57612.5761
C41.52392.62122.22621.53051.08182.24801.08242.24752.74683.09643.5077
C51.52392.62122.22621.53052.24801.08182.24751.08242.74683.50773.0964
H62.24843.52162.51551.08182.24802.53711.82603.12503.78313.83194.3803
H72.24843.52162.51552.24801.08182.53713.12501.82603.78314.38033.8319
H82.23682.77933.10741.08242.24751.82603.12502.53482.53143.13613.7861
H92.23682.77933.10742.24751.08243.12501.82602.53482.53143.78613.1361
H102.15841.09493.09802.74682.74683.78313.78312.53142.53141.77211.7721
H112.16661.09482.57613.09643.50773.83194.38033.13613.78611.77211.7751
H122.16661.09482.57613.50773.09644.38033.83193.78613.13611.77211.7751

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.321 C1 C2 H11 110.988
C1 C2 H12 110.988 C1 C4 H5 59.857
C1 C4 H6 118.294 C1 C4 H8 117.224
C1 H5 C4 59.857 C1 H5 H7 118.294
C1 H5 H9 117.224 C2 C1 C3 115.184
C2 C1 C4 118.998 C2 C1 H5 118.998
C3 C1 C4 116.217 C3 C1 H5 116.217
C4 C1 H5 60.286 C4 H5 H7 117.727
C4 H5 H9 117.641 H5 C4 H6 117.727
H5 C4 H8 117.641 H6 C4 H8 115.074
H7 H5 H9 115.074 H10 C2 H11 108.056
H10 C2 H12 108.056 H11 C2 H12 108.325
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.257      
2 C -0.535      
3 H 0.198      
4 C -0.382      
5 C -0.382      
6 H 0.200      
7 H 0.200      
8 H 0.198      
9 H 0.198      
10 H 0.182      
11 H 0.190      
12 H 0.190      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.002 0.104 0.000 0.104
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.439 0.141 0.000
y 0.141 -27.397 0.000
z 0.000 0.000 -27.228
Traceless
 xyz
x 1.873 0.141 0.000
y 0.141 -1.063 0.000
z 0.000 0.000 -0.810
Polar
3z2-r2-1.620
x2-y21.957
xy0.141
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.422 -0.363 0.000
y -0.363 5.785 0.000
z 0.000 0.000 5.487


<r2> (average value of r2) Å2
<r2> 84.060
(<r2>)1/2 9.168