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

using model chemistry: MP4=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-193.347463
Energy at 298.15K 
HF Energy-192.822448
Nuclear repulsion energy175.478619
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 MP4=FULL/3-21G
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' 3146 3080        
2 A1' 3055 2990        
3 A1' 1580 1547        
4 A1' 1104 1080        
5 A1' 931 912        
6 A1" 1018 997        
7 A2' 3122 3056        
8 A2' 955 935        
9 A2" 3133 3066        
10 A2" 1252 1226        
11 A2" 782 766        
12 E' 3130 3063        
12 E' 3130 3063        
13 E' 3050 2986        
13 E' 3050 2985        
14 E' 1540 1507        
14 E' 1540 1507        
15 E' 1251 1225        
15 E' 1251 1225        
16 E' 1250 1223        
16 E' 1250 1223        
17 E' 1111 1088        
17 E' 1111 1088        
18 E' 858 840        
18 E' 858 840        
19 E' 544 532        
19 E' 543 531        
20 E" 1157 1132        
20 E" 1157 1132        
21 E" 1066 1044        
21 E" 1066 1044        
22 E" 734 719        
22 E" 734 719        

Unscaled Zero Point Vibrational Energy (zpe) 25729.5 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 25184.0 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 MP4=FULL/3-21G
ABC
0.22927 0.22927 0.19980

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.974
C2 0.000 1.270 0.000
C3 1.100 -0.635 0.000
C4 -1.100 -0.635 0.000
C5 0.000 0.000 -0.974
H6 0.000 0.000 2.064
H7 0.000 0.000 -2.064
H8 0.915 1.876 0.000
H9 -0.915 1.876 0.000
H10 1.167 -1.730 0.000
H11 2.082 -0.146 0.000
H12 -2.082 -0.146 0.000
H13 -1.167 -1.730 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.60011.60011.60011.94721.09093.03812.30272.30272.30272.30272.30272.3027
C21.60012.19932.19931.60012.42372.42371.09701.09703.21862.51732.51733.2186
C31.60012.19932.19931.60012.42372.42372.51733.21861.09701.09703.21862.5173
C41.60012.19932.19931.60012.42372.42373.21862.51732.51733.21861.09701.0970
C51.94721.60011.60011.60013.03811.09092.30272.30272.30272.30272.30272.3027
H61.09092.42372.42372.42373.03814.12892.93542.93542.93542.93542.93542.9354
H73.03812.42372.42372.42371.09094.12892.93542.93542.93542.93542.93542.9354
H82.30271.09702.51733.21862.30272.93542.93541.82913.61432.33413.61434.1632
H92.30271.09703.21862.51732.30272.93542.93541.82914.16323.61432.33413.6143
H102.30273.21861.09702.51732.30272.93542.93543.61434.16321.82913.61432.3341
H112.30272.51731.09703.21862.30272.93542.93542.33413.61431.82914.16323.6143
H122.30272.51733.21861.09702.30272.93542.93543.61432.33413.61434.16321.8291
H132.30273.21862.51731.09702.30272.93542.93544.16323.61432.33413.61431.8291

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 74.958 C1 C2 H8 115.994
C1 C2 H9 115.994 C1 C3 C5 74.958
C1 C3 H10 115.994 C1 C3 H11 115.994
C1 C4 C5 74.958 C1 C4 H12 115.994
C1 C4 H13 115.994 C2 C1 C3 86.827
C2 C1 C4 86.827 C2 C1 H6 127.479
C2 C5 C3 86.827 C2 C5 C4 86.827
C2 C5 H7 127.479 C3 C1 C4 86.827
C3 C1 H6 127.479 C3 C5 C4 86.827
C3 C5 H7 127.479 C4 C1 H6 127.479
C4 C5 H7 127.479 C5 C2 H8 115.994
C5 C2 H9 115.994 C5 C3 H10 115.994
C5 C3 H11 115.994 C5 C4 H12 115.994
C5 C4 H13 115.994 H8 C2 H9 112.953
H10 C3 H11 112.953 H12 C4 H13 112.953
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability