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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B3LYP/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 B3LYP/6-31+G**
 hartrees
Energy at 0K-157.229457
Energy at 298.15K-157.238020
HF Energy-157.229457
Nuclear repulsion energy123.818348
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 B3LYP/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' 3220 3104 30.20      
2 A' 3140 3027 19.48      
3 A' 3133 3021 17.91      
4 A' 3092 2981 22.49      
5 A' 3025 2917 42.39      
6 A' 1520 1465 1.16      
7 A' 1504 1451 9.44      
8 A' 1429 1378 3.50      
9 A' 1396 1346 3.11      
10 A' 1234 1189 0.00      
11 A' 1209 1166 0.00      
12 A' 1051 1014 10.61      
13 A' 997 962 8.77      
14 A' 943 909 3.45      
15 A' 796 768 4.54      
16 A' 766 739 4.67      
17 A' 365 352 0.20      
18 A" 3205 3091 0.26      
19 A" 3128 3016 29.34      
20 A" 3088 2977 34.60      
21 A" 1496 1443 2.61      
22 A" 1474 1421 2.16      
23 A" 1197 1154 0.75      
24 A" 1141 1100 0.09      
25 A" 1107 1067 4.35      
26 A" 1070 1031 1.63      
27 A" 866 835 9.16      
28 A" 822 793 6.19      
29 A" 343 331 0.72      
30 A" 222 214 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23988.5 cm-1
Scaled (by 0.9642) 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 B3LYP/6-31+G**
ABC
0.51893 0.20981 0.18418

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.403 0.000
C2 -0.881 1.291 0.000
H3 1.292 0.943 0.000
C4 0.347 -0.904 0.757
C5 0.347 -0.904 -0.757
H6 1.253 -1.210 1.272
H7 1.253 -1.210 -1.272
H8 -0.570 -1.195 1.264
H9 -0.570 -1.195 -1.264
H10 -1.799 0.691 0.000
H11 -0.906 1.935 0.887
H12 -0.906 1.935 -0.887

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51491.08911.51051.51052.24492.24492.23412.23412.16452.16922.1692
C21.51492.20052.62642.62643.52483.52482.80592.80591.09631.09671.0967
H31.08912.20052.20922.20922.50082.50083.10453.10453.10102.56972.5697
C41.51052.62642.20921.51461.08642.24351.08732.23882.77863.10663.5124
C51.51052.62642.20921.51462.24351.08642.23881.08732.77863.51243.1066
H62.24493.52482.50081.08642.24352.54391.82373.12383.81383.83464.3835
H72.24493.52482.50082.24351.08642.54393.12381.82373.81384.38353.8346
H82.23412.80593.10451.08732.23881.82373.12382.52862.58143.17103.8130
H92.23412.80593.10452.23881.08733.12381.82372.52862.58143.81303.1710
H102.16451.09633.10102.77862.77863.81383.81382.58142.58141.76961.7696
H112.16921.09672.56973.10663.51243.83464.38353.17103.81301.76961.7733
H122.16921.09672.56973.51243.10664.38353.83463.81303.17101.76961.7733

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.956 C1 C2 H11 111.313
C1 C2 H12 111.313 C1 C4 H5 59.910
C1 C4 H6 118.732 C1 C4 H8 117.711
C1 H5 C4 59.910 C1 H5 H7 118.732
C1 H5 H9 117.711 C2 C1 C3 114.361
C2 C1 C4 120.477 C2 C1 H5 120.477
C3 C1 C4 115.427 C3 C1 H5 115.427
C4 C1 H5 60.181 C4 H5 H7 118.274
C4 H5 H9 117.793 H5 C4 H6 118.274
H5 C4 H8 117.793 H6 C4 H8 114.070
H7 H5 H9 114.070 H10 C2 H11 107.593
H10 C2 H12 107.593 H11 C2 H12 107.898
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.130      
2 C -0.590      
3 H 0.136      
4 C -0.337      
5 C -0.337      
6 H 0.144      
7 H 0.144      
8 H 0.141      
9 H 0.141      
10 H 0.135      
11 H 0.146      
12 H 0.146      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.035 0.140 0.000 0.145
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.736 0.227 0.000
y 0.227 -27.774 0.000
z 0.000 0.000 -27.536
Traceless
 xyz
x 1.919 0.227 0.000
y 0.227 -1.139 0.000
z 0.000 0.000 -0.780
Polar
3z2-r2-1.561
x2-y22.038
xy0.227
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.432 -0.482 0.000
y -0.482 7.340 0.000
z 0.000 0.000 6.835


<r2> (average value of r2) Å2
<r2> 84.339
(<r2>)1/2 9.184