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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B1B95/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31+G**
 hartrees
Energy at 0K-157.132598
Energy at 298.15K-157.141178
HF Energy-157.132598
Nuclear repulsion energy124.595463
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 B1B95/6-31+G**
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' 3259 3118 24.06      
2 A' 3180 3042 19.08      
3 A' 3168 3030 13.47      
4 A' 3134 2998 21.26      
5 A' 3056 2924 39.62      
6 A' 1529 1463 1.62      
7 A' 1503 1438 10.64      
8 A' 1435 1373 4.21      
9 A' 1395 1335 2.18      
10 A' 1249 1194 0.04      
11 A' 1215 1162 0.04      
12 A' 1064 1018 4.83      
13 A' 1017 973 17.03      
14 A' 943 902 2.62      
15 A' 810 775 8.29      
16 A' 779 745 1.03      
17 A' 356 340 0.25      
18 A" 3246 3105 0.22      
19 A" 3163 3025 26.04      
20 A" 3133 2997 29.64      
21 A" 1494 1430 2.65      
22 A" 1469 1405 3.15      
23 A" 1197 1145 0.76      
24 A" 1142 1092 0.11      
25 A" 1109 1061 4.97      
26 A" 1072 1025 1.82      
27 A" 899 860 9.57      
28 A" 819 784 5.26      
29 A" 342 327 0.74      
30 A" 225 215 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24199.5 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 23149.2 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 B1B95/6-31+G**
ABC
0.52432 0.21304 0.18722

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.403 0.000
C2 -0.880 1.275 0.000
H3 1.289 0.943 0.000
C4 0.347 -0.895 0.751
C5 0.347 -0.895 -0.751
H6 1.251 -1.200 1.264
H7 1.251 -1.200 -1.264
H8 -0.569 -1.182 1.256
H9 -0.569 -1.182 -1.256
H10 -1.787 0.665 0.000
H11 -0.914 1.917 0.884
H12 -0.914 1.917 -0.884

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50491.08611.49991.49992.23312.23312.22002.22002.14992.15932.1593
C21.50492.19422.60352.60353.50223.50222.77652.77651.09351.09341.0934
H31.08612.19422.19802.19802.48852.48853.08963.08963.08892.56572.5657
C41.49992.60352.19801.50291.08352.23031.08452.22542.74793.08453.4889
C51.49992.60352.19801.50292.23031.08352.22541.08452.74793.48893.0845
H62.23313.50222.48851.08352.23032.52871.82053.10933.78253.81414.3611
H72.23313.50222.48852.23031.08352.52873.10931.82053.78254.36113.8141
H82.22002.77653.08961.08452.22541.82053.10932.51252.54363.13983.7818
H92.22002.77653.08962.22541.08453.10931.82052.51252.54363.78183.1398
H102.14991.09353.08892.74792.74793.78253.78252.54362.54361.76461.7646
H112.15931.09342.56573.08453.48893.81414.36113.13983.78181.76461.7686
H122.15931.09342.56573.48893.08454.36113.81413.78183.13981.76461.7686

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.666 C1 C2 H11 111.433
C1 C2 H12 111.433 C1 C4 H5 59.934
C1 C4 H6 118.743 C1 C4 H8 117.503
C1 H5 C4 59.934 C1 H5 H7 118.743
C1 H5 H9 117.503 C2 C1 C3 114.784
C2 C1 C4 120.097 C2 C1 H5 120.097
C3 C1 C4 115.478 C3 C1 H5 115.478
C4 C1 H5 60.132 C4 H5 H7 118.253
C4 H5 H9 117.740 H5 C4 H6 118.253
H5 C4 H8 117.740 H6 C4 H8 114.225
H7 H5 H9 114.225 H10 C2 H11 107.587
H10 C2 H12 107.587 H11 C2 H12 107.958
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.093      
2 C -0.620      
3 H 0.156      
4 C -0.360      
5 C -0.360      
6 H 0.159      
7 H 0.159      
8 H 0.156      
9 H 0.156      
10 H 0.145      
11 H 0.159      
12 H 0.159      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.039 0.133 0.000 0.139
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.352 0.199 0.000
y 0.199 -27.417 0.000
z 0.000 0.000 -27.178
Traceless
 xyz
x 1.945 0.199 0.000
y 0.199 -1.151 0.000
z 0.000 0.000 -0.794
Polar
3z2-r2-1.588
x2-y22.064
xy0.199
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.340 -0.465 0.000
y -0.465 7.172 0.000
z 0.000 0.000 6.682


<r2> (average value of r2) Å2
<r2> 83.147
(<r2>)1/2 9.118