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All results from a given calculation for CH3CCH (propyne)

using model chemistry: B2PLYP=FULL/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at B2PLYP=FULL/6-311G*
 hartrees
Energy at 0K-116.559542
Energy at 298.15K 
HF Energy-116.409536
Nuclear repulsion energy58.683044
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 B2PLYP=FULL/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3488 3488 46.51 31.49 0.28 0.44
2 A1 3065 3065 18.80 180.32 0.01 0.01
3 A1 2198 2198 2.74 85.66 0.29 0.45
4 A1 1446 1446 0.01 15.17 0.57 0.72
5 A1 946 946 0.96 3.26 0.18 0.30
6 E 3133 3133 12.27 84.56 0.75 0.86
6 E 3133 3133 12.27 84.56 0.75 0.86
7 E 1516 1516 8.82 13.33 0.75 0.86
7 E 1516 1516 8.82 13.33 0.75 0.86
8 E 1071 1071 0.61 0.00 0.75 0.86
8 E 1071 1071 0.61 0.00 0.75 0.86
9 E 590 590 52.14 1.27 0.75 0.86
9 E 590 590 52.14 1.27 0.75 0.86
10 E 308 308 4.45 10.46 0.75 0.86
10 E 308 308 4.45 10.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12189.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12189.7 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 B2PLYP=FULL/6-311G*
ABC
5.36515 0.28499 0.28499

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.242
C2 0.000 0.000 0.218
C3 0.000 0.000 1.425
H4 0.000 0.000 2.488
H5 0.000 1.019 -1.632
H6 0.883 -0.510 -1.632
H7 -0.883 -0.510 -1.632

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45962.66673.72931.09151.09151.0915
C21.45961.20702.26972.11192.11192.1119
C32.66671.20701.06273.22213.22213.2221
H43.72932.26971.06274.24364.24364.2436
H51.09152.11193.22214.24361.76571.7657
H61.09152.11193.22214.24361.76571.7657
H71.09152.11193.22214.24361.76571.7657

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 110.934
C2 C1 H6 110.934 C2 C1 H7 110.934
C2 C3 H4 180.000 H5 C1 H6 107.969
H5 C1 H7 107.969 H6 C1 H7 107.969
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability