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: BLYP/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 BLYP/3-21G*
 hartrees
Energy at 0K-192.868670
Energy at 298.15K-192.873745
Nuclear repulsion energy145.632100
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 BLYP/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 3421 3399 58.82      
2 A 3190 3169 11.74      
3 A 3096 3076 7.00      
4 A 3091 3071 4.55      
5 A 2170 2155 12.67      
6 A 1487 1477 0.59      
7 A 1346 1337 3.64      
8 A 1133 1126 0.05      
9 A 1125 1118 2.20      
10 A 1040 1033 13.93      
11 A 902 896 13.18      
12 A 794 789 0.92      
13 A 731 727 4.17      
14 A 677 672 46.55      
15 A 468 465 6.02      
16 A 199 198 1.47      
17 A 3173 3153 0.02      
18 A 3089 3068 14.29      
19 A 1478 1468 3.75      
20 A 1183 1176 0.60      
21 A 1091 1084 0.74      
22 A 1063 1056 11.63      
23 A 856 851 1.42      
24 A 759 754 9.87      
25 A 628 624 53.64      
26 A 511 507 1.23      
27 A 210 209 1.71      

Unscaled Zero Point Vibrational Energy (zpe) 19455.5 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 19329.0 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 BLYP/3-21G*
ABC
0.51344 0.10944 0.10376

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.648 0.000
C2 -1.087 -0.298 0.000
H3 -0.282 1.703 0.000
C4 1.305 0.285 0.765
C5 1.305 0.285 -0.765
C6 -2.042 -1.054 0.000
H7 -2.855 -1.745 0.000
H8 1.814 1.101 1.278
H9 1.314 -0.677 1.277
H10 1.814 1.101 -1.278
H11 1.314 -0.677 -1.277

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 C6 H7 H8 H9 H10 H11
C11.44081.09261.55521.55522.65783.72532.26502.26092.26502.2609
C21.44082.15692.57772.57771.21762.28493.46532.74593.46532.7459
H31.09262.15692.26172.26173.27044.30232.52813.13732.52813.1373
C41.55522.57772.26171.53023.68444.69141.09061.08932.25842.2572
C51.55522.57772.26171.53023.68444.69142.25842.25721.09061.0893
C62.65781.21763.27043.68443.68441.06764.59853.61054.59853.6105
H73.72532.28494.30234.69144.69141.06765.61594.48965.61594.4896
H82.26503.46532.52811.09062.25844.59855.61591.84672.55603.1527
H92.26092.74593.13731.08932.25723.61054.48961.84673.15272.5544
H102.26503.46532.52812.25841.09064.59855.61592.55603.15271.8467
H112.26092.74593.13732.25721.08933.61054.48963.15272.55441.8467

picture of Cyclopropylacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C6 177.330 C1 C4 C5 60.532
C1 C4 H8 116.660 C1 C4 H9 116.397
C1 C5 C4 60.532 C1 C5 H10 116.660
C1 C5 H11 116.397 C2 C1 H3 116.042
C2 C1 C4 118.663 C2 C1 C5 118.663
C2 C6 H7 177.987 H3 C1 C4 116.246
H3 C1 C5 116.246 C4 C1 C5 58.937
C4 C5 H10 118.055 C4 C5 H11 118.043
C5 C4 H8 118.055 C5 C4 H9 118.043
H8 C4 H9 115.814 H10 C5 H11 115.814
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.423      
2 C 0.212      
3 H 0.209      
4 C -0.328      
5 C -0.328      
6 C -0.339      
7 H 0.206      
8 H 0.193      
9 H 0.202      
10 H 0.193      
11 H 0.202      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.835 0.339 0.000 0.901
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.870 2.619 0.000
y 2.619 -27.472 0.000
z 0.000 0.000 -31.324
Traceless
 xyz
x 0.528 2.619 0.000
y 2.619 2.625 0.000
z 0.000 0.000 -3.153
Polar
3z2-r2-6.306
x2-y2-1.398
xy2.619
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> 122.570
(<r2>)1/2 11.071