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 C5H6 (3-Penten-1-yne, (E)-)

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-193.445298
Energy at 298.15K-193.449426
HF Energy-192.781776
Nuclear repulsion energy137.694481
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 MP2/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3489 3315 58.45      
2 A' 3194 3035 22.62      
3 A' 3182 3024 4.35      
4 A' 3167 3009 10.37      
5 A' 3068 2916 21.23      
6 A' 2125 2020 0.21      
7 A' 1698 1614 1.08      
8 A' 1530 1454 13.60      
9 A' 1449 1377 3.21      
10 A' 1342 1276 1.35      
11 A' 1331 1265 1.08      
12 A' 1150 1093 0.27      
13 A' 1057 1005 9.39      
14 A' 924 878 6.67      
15 A' 599 569 48.58      
16 A' 538 511 0.15      
17 A' 384 365 1.49      
18 A' 167 159 1.18      
19 A" 3142 2986 15.30      
20 A" 1514 1439 9.89      
21 A" 1078 1025 0.16      
22 A" 977 929 47.51      
23 A" 788 749 1.24      
24 A" 515 489 37.59      
25 A" 351 333 10.23      
26 A" 188 179 0.45      
27 A" 154 146 1.27      

Unscaled Zero Point Vibrational Energy (zpe) 19550.5 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 18578.8 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 MP2/6-311G*
ABC
1.27584 0.07446 0.07129

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.336 -0.431 0.000
H2 -2.768 -0.919 0.879
H3 -2.768 -0.919 -0.879
H4 -2.648 0.616 0.000
C5 -0.844 -0.555 0.000
H6 -0.425 -1.561 0.000
C7 0.000 0.495 0.000
H8 -0.405 1.507 0.000
C9 1.423 0.370 0.000
C10 2.642 0.295 0.000
H11 3.705 0.230 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 C7 H8 C9 C10 H11
C11.09481.09481.09251.49672.21972.51252.73543.84265.03026.0765
H21.09481.75841.77282.14692.58393.23063.49914.47215.61416.6330
H31.09481.75841.77282.14692.58393.23063.49914.47215.61416.6330
H41.09251.77281.77282.15093.11152.65102.41364.07835.30016.3649
C51.49672.14692.14692.15091.08991.34722.10832.44813.58804.6161
H62.21972.58392.58393.11151.08992.09993.06842.67293.58494.5017
C72.51253.23063.23062.65101.34722.09991.09011.42812.64963.7144
H82.73543.49913.49912.41362.10833.06841.09012.15273.27974.3041
C93.84264.47214.47214.07832.44812.67291.42812.15271.22172.2866
C105.03025.61415.61415.30013.58803.58492.64963.27971.22171.0648
H116.07656.63306.63306.36494.61614.50173.71444.30412.28661.0648

picture of 3-Penten-1-yne, (E)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 H6 117.348 C1 C5 C7 124.037
H2 C1 H3 106.856 H2 C1 H4 108.295
H2 C1 C5 110.923 H3 C1 H4 108.295
H3 C1 C5 110.923 H4 C1 C5 111.384
C5 C7 H8 119.387 C5 C7 C9 123.766
H6 C5 C7 118.615 C7 C9 C10 178.529
H8 C7 C9 116.847 C9 C10 H11 179.930
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability