return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B3LYP/TZVP

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/TZVP
 hartrees
Energy at 0K-157.268859
Energy at 298.15K-157.277457
HF Energy-157.268859
Nuclear repulsion energy124.243058
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/TZVP
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' 3211 3100 27.67      
2 A' 3134 3025 19.26      
3 A' 3126 3018 14.08      
4 A' 3081 2974 22.14      
5 A' 3020 2915 36.43      
6 A' 1516 1463 1.18      
7 A' 1504 1452 9.26      
8 A' 1428 1379 3.80      
9 A' 1400 1352 1.98      
10 A' 1234 1192 0.00      
11 A' 1211 1169 0.00      
12 A' 1051 1015 10.71      
13 A' 997 963 7.11      
14 A' 946 913 3.80      
15 A' 800 772 3.35      
16 A' 768 741 5.29      
17 A' 369 356 0.20      
18 A" 3196 3086 0.28      
19 A" 3122 3014 27.31      
20 A" 3076 2970 32.40      
21 A" 1496 1444 2.21      
22 A" 1476 1425 3.20      
23 A" 1201 1159 0.77      
24 A" 1146 1106 0.11      
25 A" 1111 1073 4.46      
26 A" 1075 1038 1.58      
27 A" 864 834 8.15      
28 A" 827 798 6.52      
29 A" 347 335 0.74      
30 A" 223 216 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23977.8 cm-1
Scaled (by 0.9654) Zero Point Vibrational Energy (zpe) 23148.2 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 B3LYP/TZVP
ABC
0.52257 0.21123 0.18548

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.346 0.401 0.000
C2 -0.878 1.286 0.000
H3 1.288 0.939 0.000
C4 0.346 -0.901 0.755
C5 0.346 -0.901 -0.755
H6 1.250 -1.205 1.267
H7 1.250 -1.205 -1.267
H8 -0.569 -1.190 1.259
H9 -0.569 -1.190 -1.259
H10 -1.793 0.688 0.000
H11 -0.904 1.929 0.884
H12 -0.904 1.929 -0.884

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51011.08521.50531.50532.23652.23652.22582.22582.15812.16262.1626
C21.51012.19422.61732.61733.51253.51252.79512.79511.09311.09351.0935
H31.08522.19422.20102.20102.49042.49043.09313.09313.09192.56262.5626
C41.50532.61732.20101.50921.08262.23501.08352.23032.76943.09663.5009
C51.50532.61732.20101.50922.23501.08262.23031.08352.76943.50093.0966
H62.23653.51252.49041.08262.23502.53311.81853.11223.80103.82204.3686
H72.23653.51252.49042.23501.08262.53313.11221.81853.80104.36863.8220
H82.22582.79513.09311.08352.23031.81853.11222.51822.57153.15983.7994
H92.22582.79513.09312.23031.08353.11221.81852.51822.57153.79943.1598
H102.15811.09313.09192.76942.76943.80103.80102.57152.57151.76461.7646
H112.16261.09352.56263.09663.50093.82204.36863.15983.79941.76461.7675
H122.16261.09352.56263.50093.09664.36863.82203.79943.15981.76461.7675

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.977 C1 C2 H11 111.315
C1 C2 H12 111.315 C1 C4 H5 59.913
C1 C4 H6 118.678 C1 C4 H8 117.666
C1 H5 C4 59.913 C1 H5 H7 118.678
C1 H5 H9 117.666 C2 C1 C3 114.444
C2 C1 C4 120.452 C2 C1 H5 120.452
C3 C1 C4 115.386 C3 C1 H5 115.386
C4 C1 H5 60.174 C4 H5 H7 118.222
C4 H5 H9 117.753 H5 C4 H6 118.222
H5 C4 H8 117.753 H6 C4 H8 114.185
H7 H5 H9 114.185 H10 C2 H11 107.606
H10 C2 H12 107.606 H11 C2 H12 107.846
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.078      
2 C -0.343      
3 H 0.147      
4 C -0.300      
5 C -0.300      
6 H 0.138      
7 H 0.138      
8 H 0.131      
9 H 0.131      
10 H 0.100      
11 H 0.117      
12 H 0.117      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.033 0.142 0.000 0.146
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.687 0.218 0.000
y 0.218 -27.675 0.000
z 0.000 0.000 -27.437
Traceless
 xyz
x 1.868 0.218 0.000
y 0.218 -1.113 0.000
z 0.000 0.000 -0.756
Polar
3z2-r2-1.512
x2-y21.987
xy0.218
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.608 -0.478 0.000
y -0.478 7.383 0.000
z 0.000 0.000 6.864


<r2> (average value of r2) Å2
<r2> 83.823
(<r2>)1/2 9.155