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 C5H8 (Spiropentane)

using model chemistry: PBEPBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-195.011293
Energy at 298.15K-195.019763
Nuclear repulsion energy169.469082
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 PBEPBE/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 A1 3065 3023 0.00      
2 A1 1456 1437 0.00      
3 A1 1070 1056 0.00      
4 A1 1025 1011 0.00      
5 A1 603 595 0.00      
6 A2 3141 3098 0.00      
7 A2 1137 1122 0.00      
8 A2 805 794 0.00      
9 B1 3140 3097 0.00      
10 B1 1148 1132 0.00      
11 B1 993 980 0.00      
12 B1 283 279 0.00      
13 B2 3064 3022 39.12      
14 B2 1554 1533 0.74      
15 B2 1402 1382 0.43      
16 B2 978 965 11.18      
17 B2 903 890 14.21      
18 E 3153 3110 22.09      
18 E 3153 3110 22.09      
19 E 3062 3020 24.25      
19 E 3062 3020 24.25      
20 E 1426 1406 0.48      
20 E 1426 1406 0.48      
21 E 1151 1135 2.19      
21 E 1151 1135 2.19      
22 E 1031 1017 2.39      
22 E 1031 1017 2.39      
23 E 877 865 3.40      
23 E 877 865 3.40      
24 E 767 756 0.41      
24 E 767 756 0.41      
25 E 295 291 0.35      
25 E 295 291 0.35      

Unscaled Zero Point Vibrational Energy (zpe) 24644.5 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 24306.8 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 PBEPBE/6-31G**
ABC
0.35032 0.13765 0.13765

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.000 0.766 1.277
C3 0.000 -0.766 1.277
C4 -0.766 0.000 -1.277
C5 0.766 0.000 -1.277
H6 0.920 1.276 1.582
H7 -0.920 1.276 1.582
H8 -0.920 -1.276 1.582
H9 0.920 -1.276 1.582
H10 -1.276 -0.920 -1.582
H11 -1.276 0.920 -1.582
H12 1.276 0.920 -1.582
H13 1.276 -0.920 -1.582

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.48891.48891.48891.48892.23092.23092.23092.23092.23092.23092.23092.2309
C21.48891.53242.77362.77361.09521.09522.26032.26033.55573.13433.13433.5557
C31.48891.53242.77362.77362.26032.26031.09521.09523.13433.55573.55573.1343
C41.48892.77362.77361.53243.55573.13433.13433.55571.09521.09522.26032.2603
C51.48892.77362.77361.53243.13433.55573.55573.13432.26032.26031.09521.0952
H62.23091.09522.26033.55573.13431.84013.14562.55124.43343.86793.20413.8679
H72.23091.09522.26033.13433.55571.84012.55123.14563.86793.20413.86794.4334
H82.23092.26031.09523.13433.55573.14562.55121.84013.20413.86794.43343.8679
H92.23092.26031.09523.55573.13432.55123.14561.84013.86794.43343.86793.2041
H102.23093.55573.13431.09522.26034.43343.86793.20413.86791.84013.14562.5512
H112.23093.13433.55571.09522.26033.86793.20413.86794.43341.84012.55123.1456
H122.23093.13433.55572.26031.09523.20413.86794.43343.86793.14562.55121.8401
H132.23093.55573.13432.26031.09523.86794.43343.86793.20412.55123.14561.8401

picture of Spiropentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 59.029 C1 C2 H6 118.597
C1 C2 H7 118.597 C1 C3 C2 59.029
C1 C3 H8 118.597 C1 C3 H9 118.597
C1 C4 C5 59.029 C1 C4 H10 118.597
C1 C4 H11 118.597 C1 C5 C4 59.029
C1 C5 H12 118.597 C1 C5 H13 118.597
C2 C1 C3 61.942 C2 C1 C4 137.323
C2 C1 C5 137.323 C2 C3 H8 117.721
C2 C3 H9 117.721 C3 C1 C4 137.323
C3 C1 C5 137.323 C3 C2 H6 117.721
C3 C2 H7 117.721 C4 C1 C5 61.942
C4 C5 H12 117.721 C4 C5 H13 117.721
C5 C4 H10 117.721 C5 C4 H11 117.721
H6 C2 H7 114.299 H8 C3 H9 114.299
H10 C4 H11 114.299 H12 C5 H13 114.299
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.049      
2 C -0.260      
3 C -0.260      
4 C -0.260      
5 C -0.260      
6 H 0.124      
7 H 0.124      
8 H 0.124      
9 H 0.124      
10 H 0.124      
11 H 0.124      
12 H 0.124      
13 H 0.124      


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


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.284 0.000 0.000
y 0.000 -30.284 0.000
z 0.000 0.000 -32.115
Traceless
 xyz
x 0.915 0.000 0.000
y 0.000 0.915 0.000
z 0.000 0.000 -1.830
Polar
3z2-r2-3.661
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.128 0.000 0.000
y 0.000 7.128 0.000
z 0.000 0.000 8.289


<r2> (average value of r2) Å2
<r2> 112.314
(<r2>)1/2 10.598