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return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for (cyclobutane)

using model chemistry: BLYP/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at BLYP/aug-cc-pVTZ
 hartrees
Energy at 0K-157.167917
Energy at 298.15K-157.176911
HF Energy-157.167917
Nuclear repulsion energy126.060220
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 BLYP/aug-cc-pVTZ
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 2998 2987 0.00      
2 A1 2975 2965 0.00      
3 A1 1483 1478 0.00      
4 A1 1144 1140 0.00      
5 A1 971 968 0.00      
6 A1 182 181 0.00      
7 A2 1225 1221 0.00      
8 A2 938 935 0.00      
9 B1 1221 1217 0.00      
10 B1 1133 1129 0.00      
11 B1 900 897 0.00      
12 B2 3030 3020 111.21      
13 B2 2969 2959 8.60      
14 B2 1458 1453 2.62      
15 B2 857 854 0.00      
16 B2 625 623 2.17      
17 E 3012 3002 18.96      
17 E 3012 3002 18.96      
18 E 2970 2960 91.82      
18 E 2970 2960 91.82      
19 E 1449 1444 0.69      
19 E 1449 1444 0.69      
20 E 1246 1241 0.91      
20 E 1246 1241 0.91      
21 E 1211 1207 0.61      
21 E 1211 1207 0.61      
22 E 875 872 1.66      
22 E 875 872 1.66      
23 E 733 730 0.13      
23 E 733 730 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 23549.3 cm-1
Scaled (by 0.9966) Zero Point Vibrational Energy (zpe) 23469.2 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 BLYP/aug-cc-pVTZ
ABC
0.35177 0.35177 0.20744

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/aug-cc-pVTZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.092 0.120
C2 0.000 -1.092 0.120
C3 -1.092 0.000 -0.120
C4 1.092 0.000 -0.120
H5 0.000 1.445 1.158
H6 0.000 1.965 -0.543
H7 0.000 -1.445 1.158
H8 0.000 -1.965 -0.543
H9 -1.445 0.000 -1.158
H10 -1.965 0.000 0.543
H11 1.445 0.000 -1.158
H12 1.965 0.000 0.543

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.18491.56351.56351.09651.09572.74193.12822.21732.28742.21732.2874
C22.18491.56351.56352.74193.12821.09651.09572.21732.28742.21732.2874
C31.56351.56352.18492.21732.28742.21732.28741.09651.09572.74193.1282
C41.56351.56352.18492.21732.28742.21732.28742.74193.12821.09651.0957
H51.09652.74192.21732.21731.77902.89063.81083.08932.51533.08932.5153
H61.09573.12822.28742.28741.77903.81083.92922.51532.98322.51532.9832
H72.74191.09652.21732.21732.89063.81081.77903.08932.51533.08932.5153
H83.12821.09572.28742.28743.81083.92921.77902.51532.98322.51532.9832
H92.21732.21731.09652.74193.08932.51533.08932.51531.77902.89063.8108
H102.28742.28741.09573.12822.51532.98322.51532.98321.77903.81083.9292
H112.21732.21732.74191.09653.08932.51533.08932.51532.89063.81081.7790
H122.28742.28743.12821.09572.51532.98322.51532.98323.81083.92921.7790

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.649 C1 C3 H9 111.729
C1 C3 H10 117.595 C1 C4 C2 88.649
C1 C4 H11 111.729 C1 C4 H12 117.595
C2 C3 H9 111.729 C2 C3 H10 117.595
C2 C4 H11 111.729 C2 C4 H12 117.595
C3 C1 C4 88.649 C3 C1 H5 111.729
C3 C1 H6 117.595 C3 C2 C4 88.649
C3 C2 H7 111.729 C3 C2 H8 117.595
C4 C1 H5 111.729 C4 C1 H6 117.595
C4 C2 H7 111.729 C4 C2 H8 117.595
H5 C1 H6 108.482 H7 C2 H8 108.482
H9 C3 H10 108.482 H11 C4 H12 108.482
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.362      
2 C -0.362      
3 C -0.362      
4 C -0.362      
5 H 0.116      
6 H 0.245      
7 H 0.116      
8 H 0.245      
9 H 0.116      
10 H 0.245      
11 H 0.116      
12 H 0.245      


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 -27.971 0.000 0.000
y 0.000 -27.971 0.000
z 0.000 0.000 -26.418
Traceless
 xyz
x -0.776 0.000 0.000
y 0.000 -0.776 0.000
z 0.000 0.000 1.552
Polar
3z2-r23.105
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 7.940 0.000 0.000
y 0.000 7.940 0.000
z 0.000 0.000 6.840


<r2> (average value of r2) Å2
<r2> 76.476
(<r2>)1/2 8.745