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All results from a given calculation for CH3CCH (propyne)

using model chemistry: HF/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 HF/daug-cc-pVDZ
 hartrees
Energy at 0K-115.878990
Energy at 298.15K 
HF Energy-115.878990
Nuclear repulsion energy58.837251
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-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 3628 3309 67.77 18.87 0.39 0.56
2 A1 3183 2903 21.96 210.86 0.01 0.02
3 A1 2385 2175 5.99 170.10 0.09 0.17
4 A1 1514 1381 1.13 4.46 0.54 0.70
5 A1 979 893 2.35 9.51 0.05 0.10
6 E 3259 2972 12.21 67.86 0.75 0.86
6 E 3259 2972 12.21 67.86 0.75 0.86
7 E 1576 1437 8.42 5.42 0.75 0.86
7 E 1576 1437 8.42 5.42 0.75 0.86
8 E 1135 1035 0.01 0.24 0.75 0.86
8 E 1135 1035 0.01 0.24 0.75 0.86
9 E 755 688 55.04 3.94 0.75 0.86
9 E 755 688 55.04 3.94 0.75 0.86
10 E 373 340 11.25 3.92 0.75 0.86
10 E 373 340 11.25 3.92 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12941.9 cm-1
Scaled (by 0.912) Zero Point Vibrational Energy (zpe) 11803.0 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 HF/daug-cc-pVDZ
ABC
5.35117 0.28604 0.28604

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.245
C2 0.000 0.000 0.225
C3 0.000 0.000 1.418
H4 0.000 0.000 2.479
H5 0.000 1.021 -1.623
H6 0.884 -0.510 -1.623
H7 -0.884 -0.510 -1.623

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46982.66323.72381.08861.08861.0886
C21.46981.19342.25412.11112.11112.1111
C32.66321.19341.06063.20813.20813.2081
H43.72382.25411.06064.22714.22714.2271
H51.08862.11113.20814.22711.76801.7680
H61.08862.11113.20814.22711.76801.7680
H71.08862.11113.20814.22711.76801.7680

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 110.329
C2 C1 H6 110.329 C2 C1 H7 110.329
C2 C3 H4 180.000 H5 C1 H6 108.600
H5 C1 H7 108.600 H6 C1 H7 108.600
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.250      
2 C -1.806      
3 C 1.858      
4 H -0.510      
5 H 0.069      
6 H 0.069      
7 H 0.069      


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 -0.797 0.797
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.021 0.000 0.000
y 0.000 -20.021 0.000
z 0.000 0.000 -13.973
Traceless
 xyz
x -3.024 0.000 0.000
y 0.000 -3.024 0.000
z 0.000 0.000 6.048
Polar
3z2-r212.097
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 4.250 0.000 0.000
y 0.000 4.250 0.000
z 0.000 0.000 7.196


<r2> (average value of r2) Å2
<r2> 50.091
(<r2>)1/2 7.077