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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: MP2/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-156.743332
Energy at 298.15K-156.752611
HF Energy-156.145345
Nuclear repulsion energy127.666669
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 MP2/TZVP
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 3159 2995 0.00      
2 A1 3109 2947 0.00      
3 A1 1547 1466 0.00      
4 A1 1202 1140 0.00      
5 A1 1047 992 0.00      
6 A1 277 262 0.00      
7 A2 1264 1198 0.00      
8 A2 968 918 0.00      
9 B1 1276 1209 0.00      
10 B1 1154 1094 0.00      
11 B1 954 904 0.00      
12 B2 3187 3021 80.79      
13 B2 3104 2943 14.23      
14 B2 1515 1436 4.79      
15 B2 939 890 0.07      
16 B2 633 600 1.59      
17 E 3172 3007 25.08      
17 E 3172 3007 25.08      
18 E 3105 2944 64.80      
18 E 3105 2944 64.80      
19 E 1508 1429 0.41      
19 E 1508 1429 0.41      
20 E 1309 1241 3.27      
20 E 1309 1241 3.27      
21 E 1264 1198 0.20      
21 E 1264 1198 0.20      
22 E 933 885 3.16      
22 E 933 885 3.16      
23 E 777 736 0.19      
23 E 777 736 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 24734.5 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 23445.8 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 MP2/TZVP
ABC
0.35974 0.35974 0.21639

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.089 0.062
C2 0.000 -1.089 0.062
C3 1.089 0.000 -0.062
C4 -1.089 0.000 -0.062
H5 0.000 1.812 -0.757
H6 0.000 1.643 0.999
H7 0.000 -1.812 -0.757
H8 0.000 -1.643 0.999
H9 1.812 0.000 0.757
H10 1.643 0.000 -0.999
H11 -1.812 0.000 0.757
H12 -1.643 0.000 -0.999

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.17861.54551.54551.09281.08783.01482.88852.22542.23892.22542.2389
C22.17861.54551.54553.01482.88851.09281.08782.22542.23892.22542.2389
C31.54551.54552.17862.22542.23892.22542.23891.09281.08783.01482.8885
C41.54551.54552.17862.22542.23892.22542.23893.01482.88851.09281.0878
H51.09283.01482.22542.22541.76393.62393.87582.97662.45802.97662.4580
H61.08782.88852.23892.23891.76393.87583.28672.45803.06422.45803.0642
H73.01481.09282.22542.22543.62393.87581.76392.97662.45802.97662.4580
H82.88851.08782.23892.23893.87583.28671.76392.45803.06422.45803.0642
H92.22542.22541.09283.01482.97662.45802.97662.45801.76393.62393.8758
H102.23892.23891.08782.88852.45803.06422.45803.06421.76393.87583.2867
H112.22542.22543.01481.09282.97662.45802.97662.45803.62393.87581.7639
H122.23892.23892.88851.08782.45803.06422.45803.06423.87583.28671.7639

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 89.626 C1 C3 H9 113.923
C1 C3 H10 115.371 C1 C4 C2 89.626
C1 C4 H11 113.923 C1 C4 H12 115.371
C2 C3 H9 113.923 C2 C3 H10 115.371
C2 C4 H11 113.923 C2 C4 H12 115.371
C3 C1 C4 89.626 C3 C1 H5 113.923
C3 C1 H6 115.371 C3 C2 C4 89.626
C3 C2 H7 113.923 C3 C2 H8 115.371
C4 C1 H5 113.923 C4 C1 H6 115.371
C4 C2 H7 113.923 C4 C2 H8 115.371
H5 C1 H6 107.981 H7 C2 H8 107.981
H9 C3 H10 107.981 H11 C4 H12 107.981
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability