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All results from a given calculation for CH3CCH (propyne)

using model chemistry: PBE1PBE/aug-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 PBE1PBE/aug-cc-pVDZ
 hartrees
Energy at 0K-116.514528
Energy at 298.15K 
HF Energy-116.514528
Nuclear repulsion energy58.561286
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 PBE1PBE/aug-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 3502 3368 66.68 26.65 0.26 0.41
2 A1 3056 2938 15.81 248.84 0.02 0.04
3 A1 2245 2159 10.90 174.46 0.14 0.25
4 A1 1380 1327 0.01 10.47 0.45 0.62
5 A1 966 929 0.28 5.94 0.03 0.05
6 E 3139 3019 4.49 75.62 0.75 0.86
6 E 3139 3019 4.49 75.63 0.75 0.86
7 E 1444 1388 9.57 5.88 0.75 0.86
7 E 1444 1388 9.57 5.88 0.75 0.86
8 E 1028 989 0.21 0.27 0.75 0.86
8 E 1028 989 0.21 0.27 0.75 0.86
9 E 627 603 52.69 3.09 0.75 0.86
9 E 627 603 52.69 3.10 0.75 0.86
10 E 329 316 7.97 4.24 0.75 0.86
10 E 329 316 7.97 4.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12141.2 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 11675.0 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 PBE1PBE/aug-cc-pVDZ
ABC
5.28197 0.28468 0.28468

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.241
C2 0.000 0.000 0.214
C3 0.000 0.000 1.426
H4 0.000 0.000 2.496
H5 0.000 1.027 -1.630
H6 0.890 -0.514 -1.630
H7 -0.890 -0.514 -1.630

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45582.66753.73751.09841.09841.0984
C21.45581.21172.28172.11122.11122.1112
C32.66751.21171.07003.22413.22413.2241
H43.73752.28171.07004.25204.25204.2520
H51.09842.11123.22414.25201.77951.7795
H61.09842.11123.22414.25201.77951.7795
H71.09842.11123.22414.25201.77951.7795

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 110.715
C2 C1 H6 110.715 C2 C1 H7 110.715
C2 C3 H4 180.000 H5 C1 H6 108.199
H5 C1 H7 108.199 H6 C1 H7 108.199
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.331      
2 C -0.736      
3 C 1.142      
4 H -0.632      
5 H -0.035      
6 H -0.035      
7 H -0.035      


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 -0.856 0.856
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.755 0.000 0.000
y 0.000 -19.755 0.000
z 0.000 0.000 -14.011
Traceless
 xyz
x -2.872 0.000 0.000
y 0.000 -2.872 0.000
z 0.000 0.000 5.744
Polar
3z2-r211.489
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 4.289 0.000 0.000
y 0.000 4.289 0.000
z 0.000 0.000 7.744


<r2> (average value of r2) Å2
<r2> 50.235
(<r2>)1/2 7.088