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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-157.117402
Energy at 298.15K-157.125985
HF Energy-157.117402
Nuclear repulsion energy124.616462
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 B1B95/6-31G*
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' 3266 3100 25.80      
2 A' 3186 3025 18.53      
3 A' 3177 3016 15.37      
4 A' 3142 2983 20.43      
5 A' 3068 2912 33.91      
6 A' 1548 1470 1.04      
7 A' 1529 1452 7.97      
8 A' 1455 1382 3.14      
9 A' 1415 1343 2.51      
10 A' 1260 1196 0.17      
11 A' 1227 1165 0.06      
12 A' 1081 1026 3.90      
13 A' 1024 972 12.69      
14 A' 952 904 3.13      
15 A' 817 775 6.63      
16 A' 783 743 0.55      
17 A' 355 337 0.24      
18 A" 3252 3087 0.28      
19 A" 3172 3011 24.39      
20 A" 3142 2983 29.32      
21 A" 1521 1444 1.91      
22 A" 1491 1415 1.95      
23 A" 1210 1149 0.49      
24 A" 1156 1097 0.34      
25 A" 1123 1066 5.00      
26 A" 1081 1027 1.68      
27 A" 908 862 6.93      
28 A" 823 781 4.89      
29 A" 340 323 0.72      
30 A" 228 216 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24365.1 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 23129.7 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 B1B95/6-31G*
ABC
0.52498 0.21302 0.18727

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.346 0.403 0.000
C2 -0.879 1.275 0.000
H3 1.289 0.943 0.000
C4 0.346 -0.896 0.750
C5 0.346 -0.896 -0.750
H6 1.251 -1.199 1.265
H7 1.251 -1.199 -1.265
H8 -0.569 -1.184 1.257
H9 -0.569 -1.184 -1.257
H10 -1.788 0.666 0.000
H11 -0.913 1.918 0.884
H12 -0.913 1.918 -0.884

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50441.08651.49931.49932.23252.23252.22102.22102.15032.15992.1599
C21.50442.19312.60322.60323.50143.50142.77882.77881.09421.09401.0940
H31.08652.19312.19812.19812.48832.48833.09093.09093.08902.56522.5652
C41.49932.60322.19811.50061.08402.22971.08502.22452.74863.08563.4893
C51.49932.60322.19811.50062.22971.08402.22451.08502.74863.48933.0856
H62.23253.50142.48831.08402.22972.53011.81983.10973.78303.81384.3613
H72.23253.50142.48832.22971.08402.53013.10971.81983.78304.36133.8138
H82.22102.77883.09091.08502.22451.81983.10972.51322.54663.14303.7848
H92.22102.77883.09092.22451.08503.10971.81982.51322.54663.78483.1430
H102.15031.09423.08902.74862.74863.78303.78302.54662.54661.76541.7654
H112.15991.09402.56523.08563.48933.81384.36133.14303.78481.76541.7689
H122.15991.09402.56523.48933.08564.36133.81383.78483.14301.76541.7689

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.690 C1 C2 H11 111.476
C1 C2 H12 111.476 C1 C4 H5 59.972
C1 C4 H6 118.703 C1 C4 H8 117.609
C1 H5 C4 59.972 C1 H5 H7 118.703
C1 H5 H9 117.609 C2 C1 C3 114.700
C2 C1 C4 120.151 C2 C1 H5 120.151
C3 C1 C4 115.517 C3 C1 H5 115.517
C4 C1 H5 60.056 C4 H5 H7 118.351
C4 H5 H9 117.818 H5 C4 H6 118.351
H5 C4 H8 117.818 H6 C4 H8 114.065
H7 H5 H9 114.065 H10 C2 H11 107.564
H10 C2 H12 107.564 H11 C2 H12 107.889
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.134      
2 C -0.489      
3 H 0.163      
4 C -0.347      
5 C -0.347      
6 H 0.169      
7 H 0.169      
8 H 0.167      
9 H 0.167      
10 H 0.155      
11 H 0.164      
12 H 0.164      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.030 0.102 0.000 0.106
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.840 0.181 0.000
y 0.181 -26.772 0.000
z 0.000 0.000 -26.551
Traceless
 xyz
x 1.821 0.181 0.000
y 0.181 -1.077 0.000
z 0.000 0.000 -0.745
Polar
3z2-r2-1.489
x2-y21.932
xy0.181
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.804 -0.399 0.000
y -0.399 6.227 0.000
z 0.000 0.000 5.832


<r2> (average value of r2) Å2
<r2> 82.771
(<r2>)1/2 9.098