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All results from a given calculation for C4H6(CH3)2 (1,1-dimethylcyclobutane)

using model chemistry: MP2=FULL/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes CS 1A'

Conformer 1 (C2V)

Jump to S1C2
Vibrational Frequencies calculated at MP2=FULL/6-31G**
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/6-31G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-235.087323
Energy at 298.15K-235.100982
Nuclear repulsion energy256.388224
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=FULL/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3228 3016 50.08      
2 A' 3214 3003 38.40      
3 A' 3210 3000 20.39      
4 A' 3198 2989 15.31      
5 A' 3160 2952 29.16      
6 A' 3136 2930 6.78      
7 A' 3113 2909 24.88      
8 A' 3108 2904 23.65      
9 A' 1570 1467 1.69      
10 A' 1563 1461 1.33      
11 A' 1554 1452 5.58      
12 A' 1538 1437 0.28      
13 A' 1466 1370 1.06      
14 A' 1451 1356 7.42      
15 A' 1364 1275 5.08      
16 A' 1352 1263 1.79      
17 A' 1277 1193 0.82      
18 A' 1245 1163 0.14      
19 A' 1050 981 0.76      
20 A' 1026 959 0.35      
21 A' 986 921 0.28      
22 A' 959 896 0.31      
23 A' 907 848 0.51      
24 A' 729 681 0.80      
25 A' 614 574 1.34      
26 A' 404 378 0.47      
27 A' 360 336 0.02      
28 A' 193 180 0.01      
29 A" 3207 2997 49.26      
30 A" 3203 2993 0.42      
31 A" 3200 2991 10.52      
32 A" 3132 2927 57.78      
33 A" 1566 1463 5.78      
34 A" 1544 1443 0.08      
35 A" 1532 1432 1.60      
36 A" 1319 1233 0.17      
37 A" 1294 1209 0.26      
38 A" 1263 1180 0.02      
39 A" 1225 1144 1.97      
40 A" 1118 1045 0.04      
41 A" 1017 950 0.00      
42 A" 976 912 1.55      
43 A" 917 856 0.00      
44 A" 814 760 0.27      
45 A" 389 364 0.03      
46 A" 306 286 0.02      
47 A" 278 259 0.00      
48 A" 239 224 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 37756.4 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 35279.6 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 MP2=FULL/6-31G**
ABC
0.16812 0.10460 0.09535

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.108 0.400 0.000
C2 0.403 -1.703 0.000
C3 -0.108 -0.720 1.072
C4 -0.108 -0.720 -1.072
C5 1.203 1.171 0.000
C6 -1.292 1.347 0.000
H7 1.489 -1.775 0.000
H8 -0.009 -2.709 0.000
H9 0.498 -0.563 1.964
H10 0.498 -0.563 -1.964
H11 -1.126 -0.965 1.377
H12 -1.126 -0.965 -1.377
H13 2.062 0.501 0.000
H14 -2.230 0.794 0.000
H15 1.274 1.807 -0.883
H16 1.274 1.807 0.883
H17 -1.277 1.988 0.882
H18 -1.277 1.988 -0.882

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18
C12.16401.54991.54991.52151.51592.69853.11082.26982.26982.18972.18972.17272.15842.16102.16102.16052.1605
C22.16401.54181.54182.98343.48911.08801.08792.27292.27292.18592.18592.75873.62893.72273.72274.15064.1506
C31.54991.54182.14382.53862.61162.19412.26221.09003.09991.09042.66322.71112.81833.48092.88642.95583.5381
C41.54991.54182.14382.53862.61162.19412.26223.09991.09002.66321.09042.71112.81832.88643.48093.53812.9558
C51.52152.98342.53862.53862.50122.96044.06572.71332.71333.44753.44751.08923.45431.09041.09042.75652.7565
C61.51593.48912.61162.61162.50124.18094.25413.27243.27242.69612.69613.45891.08952.75192.75191.09071.0907
H72.69851.08802.19412.19412.96044.18091.76572.51182.51183.06413.06412.34784.52023.69623.69624.75344.7534
H83.11081.08792.26222.26224.06574.25411.76572.95342.95342.48682.48683.82114.14774.77784.77784.94514.9451
H92.26982.27291.09003.09992.71333.27242.51182.95343.92811.77323.73642.72693.62523.78472.71823.29124.2143
H102.26982.27293.09991.09002.71333.27242.51182.95343.92813.73641.77322.72693.62522.71823.78474.21433.2912
H112.18972.18591.09042.66323.44752.69613.06412.48681.77323.73642.75383.76962.49184.30713.69992.99863.7214
H122.18972.18592.66321.09043.44752.69613.06412.48683.73641.77322.75383.76962.49183.69994.30713.72142.9986
H132.17272.75872.71112.71111.08923.45892.34783.82112.72692.72693.76963.76964.30241.76261.76263.76033.7603
H142.15843.62892.81832.81833.45431.08954.52024.14773.62523.62522.49182.49184.30243.75303.75301.76461.7646
H152.16103.72273.48092.88641.09042.75193.69624.77783.78472.71824.30713.69991.76263.75301.76553.10712.5573
H162.16103.72272.88643.48091.09042.75193.69624.77782.71823.78473.69994.30711.76263.75301.76552.55733.1071
H172.16054.15062.95583.53812.75651.09074.75344.94513.29124.21432.99863.72143.76031.76463.10712.55731.7639
H182.16054.15063.53812.95582.75651.09074.75344.94514.21433.29123.72142.99863.76031.76462.55733.10711.7639

picture of 1,1-dimethylcyclobutane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.841 C1 C3 H9 117.524
C1 C3 H11 110.857 C1 C4 C2 88.841
C1 C4 H10 117.524 C1 C4 H12 110.857
C1 C5 H13 111.581 C1 C5 H15 110.578
C1 C5 H16 110.578 C1 C6 H14 110.821
C1 C6 H17 110.917 C1 C6 H18 110.917
C2 C3 H9 118.439 C2 C3 H11 111.130
C2 C4 H10 118.439 C2 C4 H12 111.130
C3 C1 C4 87.511 C3 C1 C5 111.482
C3 C1 C6 116.824 C3 C2 C4 88.091
C3 C2 H7 111.930 C3 C2 H8 117.653
C4 C1 C5 111.482 C4 C1 C6 116.824
C4 C2 H7 111.930 C4 C2 H8 117.653
C5 C1 C6 110.871 H7 C2 H8 108.478
H9 C3 H11 108.824 H10 C4 H12 108.824
H13 C5 H15 107.932 H13 C5 H16 107.932
H14 C6 H17 108.073 H14 C6 H18 108.073
H15 C5 H16 108.113 H17 C6 H18 107.918
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability