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All results from a given calculation for CH3CCH (propyne)

using model chemistry: QCISD(T)=FULL/aug-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 QCISD(T)=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-116.499223
Energy at 298.15K 
HF Energy-115.908995
Nuclear repulsion energy58.736816
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 QCISD(T)=FULL/aug-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 3463 3463        
2 A1 3055 3055        
3 A1 2184 2184        
4 A1 1413 1413        
5 A1 943 943        
6 E 3116 3116        
6 E 3116 3116        
7 E 1502 1502        
7 E 1502 1502        
8 E 1066 1066        
8 E 1065 1065        
9 E 646 646        
9 E 646 646        
10 E 323 323        
10 E 323 323        

Unscaled Zero Point Vibrational Energy (zpe) 12181.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12181.4 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 QCISD(T)=FULL/aug-cc-pVTZ
ABC
5.36417 0.28549 0.28549

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/aug-cc-pVTZ

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 0.217
C3 0.000 0.000 1.424
H4 0.000 0.000 2.483
H5 0.000 1.020 -1.626
H6 0.883 -0.510 -1.626
H7 -0.883 -0.510 -1.626

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45852.66623.72461.08941.08941.0894
C21.45851.20772.26602.10562.10562.1056
C32.66621.20771.05843.21593.21593.2159
H43.72462.26601.05844.23304.23304.2330
H51.08942.10563.21594.23301.76591.7659
H61.08942.10563.21594.23301.76591.7659
H71.08942.10563.21594.23301.76591.7659

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 110.627
C2 C1 H6 110.627 C2 C1 H7 110.627
C2 C3 H4 180.000 H5 C1 H6 108.291
H5 C1 H7 108.291 H6 C1 H7 108.291
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability