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 (Spiropentane)

using model chemistry: MP2/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at MP2/SDD
 hartrees
Energy at 0K-194.275412
Energy at 298.15K-194.284079
HF Energy-193.842470
Nuclear repulsion energy166.736925
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/SDD
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 3136 3028 0.00      
2 A1 1531 1478 0.00      
3 A1 1137 1098 0.00      
4 A1 1021 985 0.00      
5 A1 571 551 0.00      
6 A2 3232 3120 0.00      
7 A2 1195 1154 0.00      
8 A2 885 854 0.00      
9 B1 3231 3119 0.00      
10 B1 1201 1159 0.00      
11 B1 1054 1017 0.00      
12 B1 290 280 0.00      
13 B2 3139 3030 38.24      
14 B2 1575 1520 0.12      
15 B2 1471 1420 0.92      
16 B2 1104 1065 29.85      
17 B2 849 820 23.48      
18 E 3246 3133 31.58      
18 E 3246 3133 31.58      
19 E 3129 3021 27.82      
19 E 3129 3021 27.82      
20 E 1506 1454 2.23      
20 E 1506 1454 2.23      
21 E 1207 1165 5.39      
21 E 1207 1165 5.39      
22 E 1125 1086 2.80      
22 E 1125 1086 2.80      
23 E 880 849 7.31      
23 E 880 849 7.31      
24 E 810 782 2.86      
24 E 810 782 2.86      
25 E 328 316 0.61      
25 E 328 316 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 25540.2 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 24653.9 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/SDD
ABC
0.33499 0.13343 0.13343

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.000 0.791 1.295
C3 0.000 -0.791 1.295
C4 -0.791 0.000 -1.295
C5 0.791 0.000 -1.295
H6 0.924 1.291 1.603
H7 -0.924 1.291 1.603
H8 -0.924 -1.291 1.603
H9 0.924 -1.291 1.603
H10 -1.291 -0.924 -1.603
H11 -1.291 0.924 -1.603
H12 1.291 0.924 -1.603
H13 1.291 -0.924 -1.603

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.51701.51701.51701.51702.25592.25592.25592.25592.25592.25592.25592.2559
C21.51701.58112.82062.82061.09491.09492.29832.29833.60573.17493.17493.6057
C31.51701.58112.82062.82062.29832.29831.09491.09493.17493.60573.60573.1749
C41.51702.82062.82061.58113.60573.17493.17493.60571.09491.09492.29832.2983
C51.51702.82062.82061.58113.17493.60573.60573.17492.29832.29831.09491.0949
H62.25591.09492.29833.60573.17491.84753.17542.58264.48183.91343.24713.9134
H72.25591.09492.29833.17493.60571.84752.58263.17543.91343.24713.91344.4818
H82.25592.29831.09493.17493.60573.17542.58261.84753.24713.91344.48183.9134
H92.25592.29831.09493.60573.17492.58263.17541.84753.91344.48183.91343.2471
H102.25593.60573.17491.09492.29834.48183.91343.24713.91341.84753.17542.5826
H112.25593.17493.60571.09492.29833.91343.24713.91344.48181.84752.58263.1754
H122.25593.17493.60572.29831.09493.24713.91344.48183.91343.17542.58261.8475
H132.25593.60573.17492.29831.09493.91344.48183.91343.24712.58263.17541.8475

picture of Spiropentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 58.592 C1 C2 H6 118.574
C1 C2 H7 118.574 C1 C3 C2 58.592
C1 C3 H8 118.574 C1 C3 H9 118.574
C1 C4 C5 58.592 C1 C4 H10 118.574
C1 C4 H11 118.574 C1 C5 C4 58.592
C1 C5 H12 118.574 C1 C5 H13 118.574
C2 C1 C3 62.815 C2 C1 C4 136.755
C2 C1 C5 136.755 C2 C3 H8 117.215
C2 C3 H9 117.215 C3 C1 C4 136.755
C3 C1 C5 136.755 C3 C2 H6 117.215
C3 C2 H7 117.215 C4 C1 C5 62.815
C4 C5 H12 117.215 C4 C5 H13 117.215
C5 C4 H10 117.215 C5 C4 H11 117.215
H6 C2 H7 115.062 H8 C3 H9 115.062
H10 C4 H11 115.062 H12 C5 H13 115.062
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability