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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: B1B95/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at B1B95/6-311G*
 hartrees
Energy at 0K-157.157342
Energy at 298.15K-157.166466
HF Energy-157.157342
Nuclear repulsion energy127.690636
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 B1B95/6-311G*
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 3106 2977 0.00      
2 A1 3069 2942 0.00      
3 A1 1516 1453 0.00      
4 A1 1168 1119 0.00      
5 A1 1043 1000 0.00      
6 A1 211 202 0.00      
7 A2 1246 1195 0.00      
8 A2 962 922 0.00      
9 B1 1256 1204 0.00      
10 B1 1163 1115 0.00      
11 B1 962 923 0.00      
12 B2 3135 3005 103.30      
13 B2 3063 2936 13.51      
14 B2 1481 1420 5.38      
15 B2 897 860 0.00      
16 B2 616 591 3.17      
17 E 3118 2989 27.05      
17 E 3118 2989 27.05      
18 E 3063 2937 75.98      
18 E 3063 2937 75.98      
19 E 1475 1414 1.23      
19 E 1475 1414 1.23      
20 E 1287 1233 2.89      
20 E 1287 1233 2.89      
21 E 1249 1198 0.39      
21 E 1249 1198 0.39      
22 E 933 894 3.35      
22 E 933 894 3.35      
23 E 755 724 0.45      
23 E 755 724 0.45      

Unscaled Zero Point Vibrational Energy (zpe) 24326.5 cm-1
Scaled (by 0.9586) Zero Point Vibrational Energy (zpe) 23319.4 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 B1B95/6-311G*
ABC
0.36071 0.36071 0.21519

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.072 0.140
C2 0.000 -1.072 0.140
C3 -1.072 0.000 -0.140
C4 1.072 0.000 -0.140
H5 0.000 1.362 1.193
H6 0.000 1.975 -0.471
H7 0.000 -1.362 1.193
H8 0.000 -1.975 -0.471
H9 -1.362 0.000 -1.193
H10 -1.975 0.000 0.471
H11 1.362 0.000 -1.193
H12 1.975 0.000 0.471

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.14351.54131.54131.09181.09042.65133.10752.18592.27142.18592.2714
C22.14351.54131.54132.65133.10751.09181.09042.18592.27142.18592.2714
C31.54131.54132.14352.18592.27142.18592.27141.09181.09042.65133.1075
C41.54131.54132.14352.18592.27142.18592.27142.65133.10751.09181.0904
H51.09182.65132.18592.18591.77282.72323.72833.06542.50523.06542.5052
H61.09043.10752.27142.27141.77283.72833.95032.50522.94762.50522.9476
H72.65131.09182.18592.18592.72323.72831.77283.06542.50523.06542.5052
H83.10751.09042.27142.27143.72833.95031.77282.50522.94762.50522.9476
H92.18592.18591.09182.65133.06542.50523.06542.50521.77282.72323.7283
H102.27142.27141.09043.10752.50522.94762.50522.94761.77283.72833.9503
H112.18592.18592.65131.09183.06542.50523.06542.50522.72323.72831.7728
H122.27142.27143.10751.09042.50522.94762.50522.94763.72833.95031.7728

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.112 C1 C3 H9 111.075
C1 C3 H10 118.324 C1 C4 C2 88.112
C1 C4 H11 111.075 C1 C4 H12 118.324
C2 C3 H9 111.075 C2 C3 H10 118.324
C2 C4 H11 111.075 C2 C4 H12 118.324
C3 C1 C4 88.112 C3 C1 H5 111.075
C3 C1 H6 118.324 C3 C2 C4 88.112
C3 C2 H7 111.075 C3 C2 H8 118.324
C4 C1 H5 111.075 C4 C1 H6 118.324
C4 C2 H7 111.075 C4 C2 H8 118.324
H5 C1 H6 108.661 H7 C2 H8 108.661
H9 C3 H10 108.661 H11 C4 H12 108.661
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.255      
2 C -0.255      
3 C -0.255      
4 C -0.255      
5 H 0.132      
6 H 0.123      
7 H 0.132      
8 H 0.123      
9 H 0.132      
10 H 0.123      
11 H 0.132      
12 H 0.123      


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 -27.175 0.000 0.000
y 0.000 -27.175 0.000
z 0.000 0.000 -25.797
Traceless
 xyz
x -0.689 0.000 0.000
y 0.000 -0.689 0.000
z 0.000 0.000 1.379
Polar
3z2-r22.757
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 6.744 0.000 0.000
y 0.000 6.744 0.000
z 0.000 0.000 6.136


<r2> (average value of r2) Å2
<r2> 74.320
(<r2>)1/2 8.621