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All results from a given calculation for CH3CCH (propyne)

using model chemistry: HF/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at HF/daug-cc-pVTZ
 hartrees
Energy at 0K-115.910691
Energy at 298.15K 
HF Energy-115.910691
Nuclear repulsion energy59.221872
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 HF/daug-cc-pVTZ
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 3616 3271 64.75 17.95 0.39 0.56
2 A1 3177 2874 20.29 207.93 0.01 0.02
3 A1 2382 2155 6.30 167.80 0.09 0.17
4 A1 1532 1386 1.04 4.52 0.52 0.68
5 A1 972 880 2.14 8.76 0.05 0.09
6 E 3240 2931 11.63 66.30 0.75 0.86
6 E 3240 2931 11.63 66.30 0.75 0.86
7 E 1597 1445 8.33 5.30 0.75 0.86
7 E 1597 1445 8.33 5.30 0.75 0.86
8 E 1153 1043 0.00 0.33 0.75 0.86
8 E 1153 1043 0.00 0.33 0.75 0.86
9 E 806 729 52.19 4.24 0.75 0.86
9 E 806 729 52.19 4.24 0.75 0.86
10 E 390 353 13.27 3.55 0.75 0.86
10 E 390 353 13.27 3.55 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13025.4 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 11782.8 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 HF/daug-cc-pVTZ
ABC
5.42623 0.28955 0.28955

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.238
C2 0.000 0.000 0.227
C3 0.000 0.000 1.409
H4 0.000 0.000 2.462
H5 0.000 1.014 -1.616
H6 0.878 -0.507 -1.616
H7 -0.878 -0.507 -1.616

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46422.64613.69981.08191.08191.0819
C21.46421.18192.23562.10282.10282.1028
C32.64611.18191.05373.18973.18973.1897
H43.69982.23561.05374.20214.20214.2021
H51.08192.10283.18974.20211.75571.7557
H61.08192.10283.18974.20211.75571.7557
H71.08192.10283.18974.20211.75571.7557

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 110.458
C2 C1 H6 110.458 C2 C1 H7 110.458
C2 C3 H4 180.000 H5 C1 H6 108.466
H5 C1 H7 108.466 H6 C1 H7 108.466
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.176      
2 C 1.382      
3 C -1.768      
4 H 1.133      
5 H 0.143      
6 H 0.143      
7 H 0.143      


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 -0.784 0.784
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.881 0.000 0.000
y 0.000 -19.881 0.000
z 0.000 0.000 -13.957
Traceless
 xyz
x -2.962 0.000 0.000
y 0.000 -2.962 0.000
z 0.000 0.000 5.923
Polar
3z2-r211.846
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 4.185 0.000 0.000
y 0.000 4.185 0.000
z 0.000 0.000 7.061


<r2> (average value of r2) Å2
<r2> 49.563
(<r2>)1/2 7.040