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All results from a given calculation for HCCOH (ethynol)

using model chemistry: CCSD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-152.303986
Energy at 298.15K-152.304670
HF Energy-151.726468
Nuclear repulsion energy57.943809
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 CCSD(T)/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3818 3722        
2 A' 3489 3401        
3 A' 2242 2185        
4 A' 1283 1250        
5 A' 1065 1038        
6 A' 613 598        
7 A' 368 359        
8 A" 531 517        
9 A" 390 380        

Unscaled Zero Point Vibrational Energy (zpe) 6898.9 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 6725.0 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 CCSD(T)/cc-pVTZ
ABC
22.03598 0.32165 0.31703

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.123 0.000
C2 0.107 1.326 0.000
O3 -0.190 -1.183 0.000
H4 0.206 2.382 0.000
H5 0.671 -1.616 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20751.31942.26851.8637
C21.20752.52591.06102.9951
O31.31942.52593.58680.9637
H42.26851.06103.58684.0248
H51.86372.99510.96374.0248

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.712 C1 O3 H5 108.429
C2 C1 O3 176.806
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability