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 CH3CCH (propyne)

using model chemistry: B3PW91/daug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at B3PW91/daug-cc-pVDZ
 hartrees
Energy at 0K-116.619137
Energy at 298.15K 
HF Energy-116.619137
Nuclear repulsion energy58.523845
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/daug-cc-pVDZ
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 3487 3487 64.41 26.70 0.29 0.44
2 A1 3039 3039 17.82 250.18 0.02 0.04
3 A1 2230 2230 10.56 182.34 0.12 0.22
4 A1 1381 1381 0.00 12.03 0.45 0.62
5 A1 957 957 0.28 6.08 0.02 0.04
6 E 3120 3120 5.73 77.09 0.75 0.86
6 E 3120 3120 5.73 77.06 0.75 0.86
7 E 1447 1447 9.19 6.25 0.75 0.86
7 E 1447 1447 9.19 6.24 0.75 0.86
8 E 1028 1028 0.16 0.19 0.75 0.86
8 E 1028 1028 0.16 0.19 0.75 0.86
9 E 605 605 52.52 2.48 0.75 0.86
9 E 605 605 52.52 2.47 0.75 0.86
10 E 320 320 6.81 3.46 0.75 0.86
10 E 320 320 6.81 3.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12066.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12066.9 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 B3PW91/daug-cc-pVDZ
ABC
5.28243 0.28421 0.28421

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/daug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.243
C2 0.000 0.000 0.215
C3 0.000 0.000 1.427
H4 0.000 0.000 2.497
H5 0.000 1.027 -1.632
H6 0.890 -0.514 -1.632
H7 -0.890 -0.514 -1.632

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45732.66993.73911.09861.09861.0986
C21.45731.21262.28182.11302.11302.1130
C32.66991.21261.06923.22693.22693.2269
H43.73912.28181.06924.25414.25414.2541
H51.09862.11303.22694.25411.77951.7795
H61.09862.11303.22694.25411.77951.7795
H71.09862.11303.22694.25411.77951.7795

picture of propyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 180.000 C2 C1 H5 110.741
C2 C1 H6 110.741 C2 C1 H7 110.741
C2 C3 H4 180.000 H5 C1 H6 108.172
H5 C1 H7 108.172 H6 C1 H7 108.172
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.073      
2 C -1.138      
3 C 1.943      
4 H -0.721      
5 H -0.004      
6 H -0.004      
7 H -0.004      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.857 0.857
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.682 0.000 0.000
y 0.000 -19.682 0.000
z 0.000 0.000 -14.034
Traceless
 xyz
x -2.824 0.000 0.000
y 0.000 -2.824 0.000
z 0.000 0.000 5.648
Polar
3z2-r211.295
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.415 0.000 0.000
y 0.000 4.415 0.000
z 0.000 0.000 7.784


<r2> (average value of r2) Å2
<r2> 50.267
(<r2>)1/2 7.090