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 (Cyclobutane, methylene-)

using model chemistry: B3LYP/STO-3G

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/STO-3G
 hartrees
Energy at 0K-192.946139
Energy at 298.15K-192.954379
Nuclear repulsion energy165.146397
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/STO-3G
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' 3481 3106 1.93      
2 A' 3444 3073 1.42      
3 A' 3390 3025 13.13      
4 A' 3360 2998 2.23      
5 A' 3332 2974 0.00      
6 A' 1892 1688 0.88      
7 A' 1661 1482 0.12      
8 A' 1639 1462 0.17      
9 A' 1570 1401 0.24      
10 A' 1394 1244 4.56      
11 A' 1314 1173 0.04      
12 A' 1170 1044 0.31      
13 A' 1055 941 0.05      
14 A' 971 866 21.84      
15 A' 935 834 0.09      
16 A' 799 713 2.57      
17 A' 717 640 0.23      
18 A' 387 346 2.46      
19 A' 73 65 0.02      
20 A" 3536 3155 0.00      
21 A" 3444 3073 0.00      
22 A" 3330 2971 0.83      
23 A" 1631 1456 0.97      
24 A" 1415 1263 1.36      
25 A" 1348 1203 0.01      
26 A" 1324 1182 0.00      
27 A" 1311 1170 4.50      
28 A" 1136 1014 0.00      
29 A" 1046 934 0.17      
30 A" 982 876 0.00      
31 A" 888 792 0.00      
32 A" 695 620 0.00      
33 A" 363 324 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 27514.7 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 24554.2 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/STO-3G
ABC
0.34383 0.14885 0.11051

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 -0.439 1.117
C2 0.001 -0.439 -1.117
C3 -0.000 0.634 0.000
C4 0.001 -1.553 0.000
C5 -0.002 1.968 0.000
H6 -0.896 -0.433 1.761
H7 -0.896 -0.433 -1.761
H8 0.898 -0.432 1.760
H9 0.898 -0.432 -1.760
H10 -0.003 2.546 0.932
H11 -0.003 2.546 -0.932
H12 0.898 -2.192 0.000
H13 -0.897 -2.192 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C12.23311.54881.57742.65361.10433.01381.10433.01302.99113.62052.26362.2635
C22.23311.54881.57742.65363.01381.10433.01301.10433.62052.99112.26362.2635
C31.54881.54882.18771.33382.24542.24542.24532.24532.12692.12692.96552.9647
C41.57741.57742.18773.52152.27162.27162.27142.27144.20424.20421.10141.1014
C52.65362.65361.33383.52153.10883.10883.10943.10941.09651.09654.25624.2548
H61.10433.01382.24542.27163.10883.52151.79443.95143.21884.11383.06822.4886
H73.01381.10432.24542.27163.10883.52153.95141.79444.11383.21883.06822.4886
H81.10433.01302.24532.27143.10941.79443.95143.51933.22004.11422.48853.0684
H93.01301.10432.24532.27143.10943.95141.79443.51934.11423.22002.48853.0684
H102.99113.62052.12694.20421.09653.21884.11383.22004.11421.86354.91214.9106
H113.62052.99112.12694.20421.09654.11383.21884.11423.22001.86354.91214.9106
H122.26362.26362.96551.10144.25623.06823.06822.48852.48854.91214.91211.7953
H132.26352.26352.96471.10144.25482.48862.48863.06843.06844.91064.91061.7953

picture of Cyclobutane, methylene- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 92.256 C1 C3 C5 133.872
C1 C4 C2 90.117 C1 C4 H12 114.168
C1 C4 H13 114.159 C2 C3 C5 133.872
C2 C4 H12 114.168 C2 C4 H13 114.159
C3 C1 C4 88.813 C3 C1 H6 114.592
C3 C1 H8 114.584 C3 C2 C4 88.813
C3 C2 H7 114.592 C3 C2 H9 114.584
C3 C5 H10 121.818 C3 C5 H11 121.818
C4 C1 H6 114.641 C4 C1 H8 114.628
C4 C2 H7 114.641 C4 C2 H9 114.628
H6 C1 H8 108.683 H7 C2 H9 108.683
H10 C5 H11 116.364 H12 C4 H13 109.171
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.145      
2 C -0.145      
3 C 0.008      
4 C -0.134      
5 C -0.181      
6 H 0.076      
7 H 0.076      
8 H 0.076      
9 H 0.076      
10 H 0.074      
11 H 0.074      
12 H 0.071      
13 H 0.071      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 -0.377 0.000 0.377
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.651 -0.001 0.000
y -0.001 -29.499 0.000
z 0.000 0.000 -28.689
Traceless
 xyz
x -0.557 -0.001 0.000
y -0.001 -0.329 0.000
z 0.000 0.000 0.886
Polar
3z2-r21.772
x2-y2-0.152
xy-0.001
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.645 -0.004 0.000
y -0.004 5.804 0.000
z 0.000 0.000 4.016


<r2> (average value of r2) Å2
<r2> 117.977
(<r2>)1/2 10.862