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All results from a given calculation for CH3CCH (propyne)

using model chemistry: B1B95/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 B1B95/daug-cc-pVDZ
 hartrees
Energy at 0K-116.601275
Energy at 298.15K 
HF Energy-116.601275
Nuclear repulsion energy58.671834
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 B1B95/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 3504 3504 64.80 28.11 0.27 0.43
2 A1 3063 3063 16.53 245.99 0.02 0.04
3 A1 2248 2248 10.43 182.04 0.12 0.22
4 A1 1384 1384 0.00 10.84 0.46 0.63
5 A1 964 964 0.29 6.78 0.03 0.05
6 E 3145 3145 5.24 75.86 0.75 0.86
6 E 3145 3145 5.24 75.83 0.75 0.86
7 E 1451 1451 9.10 6.19 0.75 0.86
7 E 1451 1451 9.10 6.19 0.75 0.86
8 E 1030 1030 0.15 0.18 0.75 0.86
8 E 1030 1030 0.15 0.18 0.75 0.86
9 E 614 614 50.95 2.51 0.75 0.86
9 E 614 614 50.96 2.51 0.75 0.86
10 E 325 325 7.24 3.49 0.75 0.86
10 E 325 325 7.24 3.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12146.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12146.9 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 B1B95/daug-cc-pVDZ
ABC
5.31115 0.28560 0.28560

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/daug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.240
C2 0.000 0.000 0.214
C3 0.000 0.000 1.424
H4 0.000 0.000 2.491
H5 0.000 1.025 -1.627
H6 0.887 -0.512 -1.627
H7 -0.887 -0.512 -1.627

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45432.66373.73071.09521.09521.0952
C21.45431.20942.27642.10692.10692.1069
C32.66371.20941.06703.21793.21793.2179
H43.73072.27641.06704.24304.24304.2430
H51.09522.10693.21794.24301.77461.7746
H61.09522.10693.21794.24301.77461.7746
H71.09522.10693.21794.24301.77461.7746

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 110.680
C2 C1 H6 110.680 C2 C1 H7 110.680
C2 C3 H4 180.000 H5 C1 H6 108.236
H5 C1 H7 108.236 H6 C1 H7 108.236
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.202      
2 C -1.446      
3 C 2.132      
4 H -0.761      
5 H -0.042      
6 H -0.042      
7 H -0.042      


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 -0.849 0.849
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.684 0.000 0.000
y 0.000 -19.684 0.000
z 0.000 0.000 -14.084
Traceless
 xyz
x -2.800 0.000 0.000
y 0.000 -2.800 0.000
z 0.000 0.000 5.601
Polar
3z2-r211.202
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 4.379 0.000 0.000
y 0.000 4.379 0.000
z 0.000 0.000 7.723


<r2> (average value of r2) Å2
<r2> 50.083
(<r2>)1/2 7.077