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All results from a given calculation for C5H6 (3-Penten-1-yne, (E)-)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-193.377564
Energy at 298.15K-193.381690
HF Energy-192.744678
Nuclear repulsion energy137.725696
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 MP2/6-31G*
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' 3521 3320 59.93      
2 A' 3217 3034 20.61      
3 A' 3205 3023 6.16      
4 A' 3192 3010 9.44      
5 A' 3095 2918 19.49      
6 A' 2155 2032 0.80      
7 A' 1725 1626 0.41      
8 A' 1555 1466 9.52      
9 A' 1472 1388 1.80      
10 A' 1362 1284 1.80      
11 A' 1348 1271 1.32      
12 A' 1165 1099 0.52      
13 A' 1072 1011 8.55      
14 A' 938 885 5.96      
15 A' 577 544 46.22      
16 A' 535 505 2.37      
17 A' 387 365 1.08      
18 A' 170 160 0.77      
19 A" 3169 2989 15.07      
20 A" 1540 1452 7.16      
21 A" 1096 1034 0.08      
22 A" 996 940 37.82      
23 A" 795 750 0.98      
24 A" 506 477 30.97      
25 A" 350 330 19.34      
26 A" 196 185 0.49      
27 A" 159 150 0.45      

Unscaled Zero Point Vibrational Energy (zpe) 19748.8 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 18623.1 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 MP2/6-31G*
ABC
1.27927 0.07450 0.07133

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.334 -0.424 0.000
H2 -2.770 -0.909 0.880
H3 -2.770 -0.909 -0.880
H4 -2.640 0.626 0.000
C5 -0.845 -0.552 0.000
H6 -0.432 -1.561 0.000
C7 0.000 0.495 0.000
H8 -0.404 1.508 0.000
C9 1.422 0.367 0.000
C10 2.643 0.291 0.000
H11 3.704 0.180 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 C7 H8 C9 C10 H11
C11.09561.09561.09341.49472.21622.50872.73113.83835.02846.0681
H21.09561.76091.77422.14642.58193.22793.49504.46905.61386.6232
H31.09561.76091.77422.14642.58193.22793.49504.46905.61386.6232
H41.09341.77421.77422.14703.10762.64322.40384.06985.29376.3593
C51.49472.14642.14642.14701.08981.34612.10722.44623.58874.6074
H62.21622.58192.58193.10761.08982.10093.06902.67443.58944.4870
C72.50873.22793.22792.64321.34612.10091.09041.42742.65103.7171
H82.73113.49503.49502.40382.10723.06901.09042.15283.28114.3170
C93.83834.46904.46904.06982.44622.67441.42742.15281.22382.2897
C105.02845.61385.61385.29373.58873.58942.65103.28111.22381.0664
H116.06816.62326.62326.35934.60744.48703.71714.31702.28971.0664

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 117.217 C1 C5 C7 123.958
H2 C1 H3 106.961 H2 C1 H4 108.299
H2 C1 C5 110.979 H3 C1 H4 108.299
H3 C1 C5 110.979 H4 C1 C5 111.169
C5 C7 H8 119.369 C5 C7 C9 123.740
H6 C5 C7 118.825 C7 C9 C10 178.424
H8 C7 C9 116.891 C9 C10 H11 177.601
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability