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

using model chemistry: CCD/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 CCD/3-21G*
 hartrees
Energy at 0K-193.324971
Energy at 298.15K 
HF Energy-192.823255
Nuclear repulsion energy175.887793
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 CCD/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' 3166 3029 0.00      
2 A1' 3073 2939 0.00      
3 A1' 1589 1520 0.00      
4 A1' 1120 1071 0.00      
5 A1' 945 904 0.00      
6 A1" 1027 982 0.00      
7 A2' 3135 2998 0.00      
8 A2' 962 920 0.00      
9 A2" 3153 3016 71.15      
10 A2" 1266 1211 35.11      
11 A2" 800 765 5.55      
12 E' 3142 3006 43.47      
12 E' 3142 3006 43.47      
13 E' 3067 2933 46.08      
13 E' 3067 2933 46.08      
14 E' 1549 1482 0.65      
14 E' 1549 1482 0.65      
15 E' 1263 1208 2.25      
15 E' 1263 1208 2.25      
16 E' 1120 1071 0.07      
16 E' 1120 1071 0.07      
17 E' 872 834 0.96      
17 E' 872 834 0.96      
18 E' 552 528 0.14      
18 E' 552 528 0.14      
19 E" 1265 1210 0.00      
19 E" 1265 1210 0.00      
20 E" 1168 1117 0.00      
20 E" 1168 1117 0.00      
21 E" 1074 1028 0.00      
21 E" 1074 1028 0.00      
22 E" 749 716 0.00      
22 E" 749 716 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25938.4 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 24810.0 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 CCD/3-21G*
ABC
0.23043 0.23043 0.20075

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.971
C2 0.000 1.266 0.000
C3 1.097 -0.633 0.000
C4 -1.097 -0.633 0.000
C5 0.000 0.000 -0.971
H6 0.000 0.000 2.060
H7 0.000 0.000 -2.060
H8 0.913 1.873 0.000
H9 -0.913 1.873 0.000
H10 1.165 -1.727 0.000
H11 2.078 -0.146 0.000
H12 -2.078 -0.146 0.000
H13 -1.165 -1.727 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.59561.59561.59561.94151.08943.03092.29842.29842.29842.29842.29842.2984
C21.59562.19332.19331.59562.41822.41821.09601.09603.21212.51262.51263.2121
C31.59562.19332.19331.59562.41822.41822.51263.21211.09601.09603.21212.5126
C41.59562.19332.19331.59562.41822.41823.21212.51262.51263.21211.09601.0960
C51.94151.59561.59561.59563.03091.08942.29842.29842.29842.29842.29842.2984
H61.08942.41822.41822.41823.03094.12032.93002.93002.93002.93002.93002.9300
H73.03092.41822.41822.41821.08944.12032.93002.93002.93002.93002.93002.9300
H82.29841.09602.51263.21212.29842.93002.93001.82583.60852.33073.60854.1566
H92.29841.09603.21212.51262.29842.93002.93001.82584.15663.60852.33073.6085
H102.29843.21211.09602.51262.29842.93002.93003.60854.15661.82583.60852.3307
H112.29842.51261.09603.21212.29842.93002.93002.33073.60851.82584.15663.6085
H122.29842.51263.21211.09602.29842.93002.93003.60852.33073.60854.15661.8258
H132.29843.21212.51261.09602.29842.93002.93004.15663.60852.33073.60851.8258

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 74.947 C1 C2 H8 116.048
C1 C2 H9 116.048 C1 C3 C5 74.947
C1 C3 H10 116.048 C1 C3 H11 116.048
C1 C4 C5 74.947 C1 C4 H12 116.048
C1 C4 H13 116.048 C2 C1 C3 86.835
C2 C1 C4 86.835 C2 C1 H6 127.474
C2 C5 C3 86.835 C2 C5 C4 86.835
C2 C5 H7 127.474 C3 C1 C4 86.835
C3 C1 H6 127.474 C3 C5 C4 86.835
C3 C5 H7 127.474 C4 C1 H6 127.474
C4 C5 H7 127.474 C5 C2 H8 116.048
C5 C2 H9 116.048 C5 C3 H10 116.048
C5 C3 H11 116.048 C5 C4 H12 116.048
C5 C4 H13 116.048 H8 C2 H9 112.812
H10 C3 H11 112.812 H12 C4 H13 112.812
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability