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All results from a given calculation for C5H8 (Bicyclo[1.1.1]pentane)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-194.649554
Energy at 298.15K 
HF Energy-193.918646
Nuclear repulsion energy180.317590
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 A1' 3202 2992 0.00      
2 A1' 3139 2933 0.00      
3 A1' 1609 1504 0.00      
4 A1' 1166 1090 0.00      
5 A1' 930 869 0.00      
6 A1" 1029 962 0.00      
7 A2' 3212 3002 0.00      
8 A2' 997 932 0.00      
9 A2" 3197 2988 107.53      
10 A2" 1299 1214 30.76      
11 A2" 884 826 3.60      
12 E' 3218 3007 56.29      
12 E' 3218 3007 56.29      
13 E' 3135 2930 64.14      
13 E' 3135 2930 64.14      
14 E' 1557 1455 0.00      
14 E' 1557 1455 0.00      
15 E' 1304 1219 1.60      
15 E' 1304 1219 1.60      
16 E' 1149 1074 0.61      
16 E' 1149 1074 0.61      
17 E' 944 882 0.20      
17 E' 944 882 0.20      
18 E' 560 523 0.16      
18 E' 560 523 0.16      
19 E" 1254 1171 0.00      
19 E" 1254 1171 0.00      
20 E" 1182 1104 0.00      
20 E" 1182 1104 0.00      
21 E" 1060 991 0.00      
21 E" 1060 991 0.00      
22 E" 832 777 0.00      
22 E" 832 777 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26527.2 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 24787.0 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
0.24349 0.24349 0.21071

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.935
C2 0.000 1.231 0.000
C3 1.066 -0.616 0.000
C4 -1.066 -0.616 0.000
C5 0.000 0.000 -0.935
H6 0.000 0.000 2.023
H7 0.000 0.000 -2.023
H8 0.902 1.843 0.000
H9 -0.902 1.843 0.000
H10 1.145 -1.702 0.000
H11 2.047 -0.140 0.000
H12 -2.047 -0.140 0.000
H13 -1.145 -1.702 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54591.54591.54591.87031.08742.95762.25452.25452.25452.25452.25452.2545
C21.54592.13222.13221.54592.36772.36771.08961.08963.14882.46372.46373.1488
C31.54592.13222.13221.54592.36772.36772.46373.14881.08951.08963.14882.4637
C41.54592.13222.13221.54592.36772.36773.14882.46372.46373.14881.08961.0895
C51.87031.54591.54591.54592.95761.08742.25452.25452.25452.25452.25452.2545
H61.08742.36772.36772.36772.95764.04502.88082.88082.88082.88082.88082.8808
H72.95762.36772.36772.36771.08744.04502.88082.88082.88082.88082.88082.8808
H82.25451.08962.46373.14882.25452.88082.88081.80343.55322.28993.55324.0932
H92.25451.08963.14882.46372.25452.88082.88081.80344.09323.55322.28993.5532
H102.25453.14881.08952.46372.25452.88082.88083.55324.09321.80343.55322.2899
H112.25452.46371.08963.14882.25452.88082.88082.28993.55321.80344.09333.5532
H122.25452.46373.14881.08962.25452.88082.88083.55322.28993.55324.09331.8034
H132.25453.14882.46371.08952.25452.88082.88084.09323.55322.28993.55321.8034

picture of Bicyclo[1.1.1]pentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 74.444 C1 C2 H8 116.552
C1 C2 H9 116.552 C1 C3 C5 74.444
C1 C3 H10 116.552 C1 C3 H11 116.552
C1 C4 C5 74.444 C1 C4 H12 116.552
C1 C4 H13 116.552 C2 C1 C3 87.199
C2 C1 C4 87.199 C2 C1 H6 127.222
C2 C5 C3 87.199 C2 C5 C4 87.199
C2 C5 H7 127.222 C3 C1 C4 87.199
C3 C1 H6 127.222 C3 C5 C4 87.199
C3 C5 H7 127.222 C4 C1 H6 127.222
C4 C5 H7 127.222 C5 C2 H8 116.552
C5 C2 H9 116.552 C5 C3 H10 116.552
C5 C3 H11 116.552 C5 C4 H12 116.552
C5 C4 H13 116.552 H8 C2 H9 111.700
H10 C3 H11 111.700 H12 C4 H13 111.700
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability