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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: B2PLYP=FULL/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 B2PLYP=FULL/6-311G*
 hartrees
Energy at 0K-157.061945
Energy at 298.15K-157.071117
HF Energy-156.857425
Nuclear repulsion energy127.044199
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 B2PLYP=FULL/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3112 3112 0.00      
2 A1 3081 3081 0.00      
3 A1 1556 1556 0.00      
4 A1 1196 1196 0.00      
5 A1 1033 1033 0.00      
6 A1 216 216 0.00      
7 A2 1268 1268 0.00      
8 A2 978 978 0.00      
9 B1 1278 1278 0.00      
10 B1 1183 1183 0.00      
11 B1 956 956 0.00      
12 B2 3145 3145 122.24      
13 B2 3072 3072 11.07      
14 B2 1522 1522 4.93      
15 B2 906 906 0.00      
16 B2 642 642 2.65      
17 E 3127 3127 22.78      
17 E 3127 3127 22.78      
18 E 3074 3074 87.77      
18 E 3074 3074 87.77      
19 E 1515 1515 1.27      
19 E 1515 1515 1.27      
20 E 1307 1307 2.34      
20 E 1307 1307 2.34      
21 E 1268 1268 0.63      
21 E 1268 1268 0.63      
22 E 927 927 3.34      
22 E 927 927 3.34      
23 E 766 766 0.34      
23 E 766 766 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 24555.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 24555.6 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 B2PLYP=FULL/6-311G*
ABC
0.35709 0.35709 0.21195

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.080 0.132
C2 0.000 -1.080 0.132
C3 -1.080 0.000 -0.132
C4 1.080 0.000 -0.132
H5 0.000 1.396 1.178
H6 0.000 1.970 -0.499
H7 0.000 -1.396 1.178
H8 0.000 -1.970 -0.499
H9 -1.396 0.000 -1.178
H10 -1.970 0.000 0.499
H11 1.396 0.000 -1.178
H12 1.970 0.000 0.499

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.16071.55061.55061.09231.09132.68843.11552.19872.27692.19872.2769
C22.16071.55061.55062.68843.11551.09231.09132.19872.27692.19872.2769
C31.55061.55062.16072.19872.27692.19872.27691.09231.09132.68843.1155
C41.55061.55062.16072.19872.27692.19872.27692.68843.11551.09231.0913
H51.09232.68842.19872.19871.77272.79273.76143.07412.50863.07412.5086
H61.09133.11552.27692.27691.77273.76143.94082.50862.96002.50862.9600
H72.68841.09232.19872.19872.79273.76141.77273.07412.50863.07412.5086
H83.11551.09132.27692.27693.76143.94081.77272.50862.96002.50862.9600
H92.19872.19871.09232.68843.07412.50863.07412.50861.77272.79273.7614
H102.27692.27691.09133.11552.50862.96002.50862.96001.77273.76143.9408
H112.19872.19872.68841.09233.07412.50863.07412.50862.79273.76141.7727
H122.27692.27693.11551.09132.50862.96002.50862.96003.76143.94081.7727

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.329 C1 C3 H9 111.408
C1 C3 H10 117.995 C1 C4 C2 88.329
C1 C4 H11 111.408 C1 C4 H12 117.995
C2 C3 H9 111.408 C2 C3 H10 117.995
C2 C4 H11 111.408 C2 C4 H12 117.995
C3 C1 C4 88.329 C3 C1 H5 111.408
C3 C1 H6 117.995 C3 C2 C4 88.329
C3 C2 H7 111.408 C3 C2 H8 117.995
C4 C1 H5 111.408 C4 C1 H6 117.995
C4 C2 H7 111.408 C4 C2 H8 117.995
H5 C1 H6 108.544 H7 C2 H8 108.544
H9 C3 H10 108.544 H11 C4 H12 108.544
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability