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 (Cyclopropylacetylene)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-192.897939
Energy at 298.15K-192.903259
Nuclear repulsion energy147.038790
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 B3PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3502 3360 67.82      
2 A 3284 3151 5.95      
3 A 3195 3065 2.99      
4 A 3182 3053 3.52      
5 A 2247 2155 14.00      
6 A 1522 1460 1.06      
7 A 1387 1331 2.39      
8 A 1188 1140 0.82      
9 A 1161 1114 2.35      
10 A 1083 1039 18.62      
11 A 952 914 18.79      
12 A 820 787 1.83      
13 A 770 739 4.79      
14 A 743 713 49.88      
15 A 494 474 9.14      
16 A 209 200 2.09      
17 A 3267 3135 0.06      
18 A 3177 3048 9.82      
19 A 1505 1443 6.99      
20 A 1214 1165 0.80      
21 A 1135 1089 0.00      
22 A 1107 1062 16.05      
23 A 906 869 0.49      
24 A 822 788 13.77      
25 A 709 680 59.12      
26 A 541 519 4.35      
27 A 220 211 2.60      

Unscaled Zero Point Vibrational Energy (zpe) 20169.3 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 19350.4 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 B3PW91/3-21G*
ABC
0.52186 0.11181 0.10609

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.649 0.000
C2 -1.071 -0.303 0.000
H3 -0.294 1.694 0.000
C4 1.285 0.291 0.757
C5 1.285 0.291 -0.757
C6 -2.010 -1.064 0.000
H7 -2.815 -1.758 0.000
H8 1.793 1.103 1.265
H9 1.295 -0.664 1.267
H10 1.793 1.103 -1.265
H11 1.295 -0.664 -1.267

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 C6 H7 H8 H9 H10 H11
C11.43271.08591.53351.53352.64093.70352.24142.23742.24142.2374
C21.43272.14272.54462.54461.20892.27133.43242.70773.43242.7077
H31.08592.14272.24392.24393.24824.27432.51193.11332.51193.1133
C41.53352.54462.24391.51393.64224.64531.08441.08312.23772.2380
C51.53352.54462.24391.51393.64224.64532.23772.23801.08441.0831
C62.64091.20893.24823.64223.64221.06264.55663.56184.55663.5618
H73.70352.27134.27434.64534.64531.06265.56964.43725.56964.4372
H82.24143.43242.51191.08442.23774.55665.56961.83622.53093.1279
H92.23742.70773.11331.08312.23803.56184.43721.83623.12792.5334
H102.24143.43242.51192.23771.08444.55665.56962.53093.12791.8362
H112.23742.70773.11332.23801.08313.56184.43723.12792.53341.8362

picture of Cyclopropylacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C6 177.390 C1 C4 C5 60.422
C1 C4 H8 116.733 C1 C4 H9 116.474
C1 C5 C4 60.422 C1 C5 H10 116.733
C1 C5 H11 116.474 C2 C1 H3 115.903
C2 C1 C4 118.117 C2 C1 C5 118.117
C2 C6 H7 178.239 H3 C1 C4 116.848
H3 C1 C5 116.848 C4 C1 C5 59.156
C4 C5 H10 117.965 C4 C5 H11 118.075
C5 C4 H8 117.965 C5 C4 H9 118.075
H8 C4 H9 115.807 H10 C5 H11 115.807
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.476      
2 C 0.173      
3 H 0.257      
4 C -0.402      
5 C -0.402      
6 C -0.383      
7 H 0.272      
8 H 0.235      
9 H 0.245      
10 H 0.235      
11 H 0.245      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.841 0.347 0.000 0.909
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.637 2.845 0.000
y 2.845 -27.068 0.000
z 0.000 0.000 -31.278
Traceless
 xyz
x 0.536 2.845 0.000
y 2.845 2.889 0.000
z 0.000 0.000 -3.426
Polar
3z2-r2-6.851
x2-y2-1.569
xy2.845
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 120.286
(<r2>)1/2 10.967