return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCSD=FULL/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at CCSD=FULL/TZVP
 hartrees
Energy at 0K-194.831744
Energy at 298.15K 
HF Energy-193.963269
Nuclear repulsion energy179.660589
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 CCSD=FULL/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' 3156 2990 0.00      
2 A1' 3087 2925 0.00      
3 A1' 1587 1504 0.00      
4 A1' 1151 1090 0.00      
5 A1' 936 887 0.00      
6 A1" 1009 956 0.00      
7 A2' 3145 2980 0.00      
8 A2' 984 933 0.00      
9 A2" 3150 2984 117.97      
10 A2" 1281 1213 35.77      
11 A2" 857 812 6.06      
12 E' 3152 2986 68.44      
12 E' 3152 2986 68.44      
13 E' 3081 2919 76.93      
13 E' 3081 2919 76.93      
14 E' 1537 1456 0.04      
14 E' 1537 1456 0.04      
15 E' 1271 1204 1.89      
15 E' 1271 1204 1.89      
16 E' 1136 1076 0.41      
16 E' 1136 1076 0.41      
17 E' 911 864 0.66      
17 E' 911 864 0.66      
18 E' 559 530 0.22      
18 E' 559 530 0.22      
19 E" 1235 1170 0.00      
19 E" 1235 1170 0.00      
20 E" 1159 1098 0.00      
20 E" 1159 1098 0.00      
21 E" 1028 974 0.00      
21 E" 1028 974 0.00      
22 E" 804 762 0.00      
22 E" 804 762 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26042.5 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 24675.2 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 CCSD=FULL/TZVP
ABC
0.24159 0.24159 0.20914

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.940
C2 0.000 1.236 0.000
C3 1.071 -0.618 0.000
C4 -1.071 -0.618 0.000
C5 0.000 0.000 -0.940
H6 0.000 0.000 2.028
H7 0.000 0.000 -2.028
H8 0.904 1.848 0.000
H9 -0.904 1.848 0.000
H10 1.148 -1.706 0.000
H11 2.052 -0.141 0.000
H12 -2.052 -0.141 0.000
H13 -1.148 -1.706 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55281.55281.55281.87921.08802.96722.26122.26122.26122.26122.26122.2612
C21.55282.14132.14131.55282.37482.37481.09101.09103.15882.47142.47143.1588
C31.55282.14132.14131.55282.37482.37482.47143.15881.09101.09103.15882.4714
C41.55282.14132.14131.55282.37482.37483.15882.47142.47143.15881.09101.0910
C51.87921.55281.55281.55282.96721.08802.26122.26122.26122.26122.26122.2612
H61.08802.37482.37482.37482.96724.05532.88822.88822.88822.88822.88822.8882
H72.96722.37482.37482.37481.08804.05532.88822.88822.88822.88822.88822.8882
H82.26121.09102.47143.15882.26122.88822.88821.80733.56242.29663.56244.1038
H92.26121.09103.15882.47142.26122.88822.88821.80734.10383.56242.29663.5624
H102.26123.15881.09102.47142.26122.88822.88823.56244.10381.80733.56242.2966
H112.26122.47141.09103.15882.26122.88822.88822.29663.56241.80734.10383.5624
H122.26122.47143.15881.09102.26122.88822.88823.56242.29663.56244.10381.8073
H132.26123.15882.47141.09102.26122.88822.88824.10383.56242.29663.56241.8073

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 74.471 C1 C2 H8 116.495
C1 C2 H9 116.495 C1 C3 C5 74.471
C1 C3 H10 116.495 C1 C3 H11 116.495
C1 C4 C5 74.471 C1 C4 H12 116.495
C1 C4 H13 116.495 C2 C1 C3 87.180
C2 C1 C4 87.180 C2 C1 H6 127.235
C2 C5 C3 87.180 C2 C5 C4 87.180
C2 C5 H7 127.235 C3 C1 C4 87.180
C3 C1 H6 127.235 C3 C5 C4 87.180
C3 C5 H7 127.235 C4 C1 H6 127.235
C4 C5 H7 127.235 C5 C2 H8 116.495
C5 C2 H9 116.495 C5 C3 H10 116.495
C5 C3 H11 116.495 C5 C4 H12 116.495
C5 C4 H13 116.495 H8 C2 H9 111.840
H10 C3 H11 111.840 H12 C4 H13 111.840
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability