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All results from a given calculation for HCCOH (ethynol)

using model chemistry: QCISD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-152.135314
Energy at 298.15K-152.136033
HF Energy-151.677823
Nuclear repulsion energy57.506942
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/cc-pVDZ
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' 3831 3676 107.22      
2 A' 3500 3358 81.00      
3 A' 2267 2175 98.09      
4 A' 1307 1254 91.63      
5 A' 1073 1029 72.47      
6 A' 633 607 39.52      
7 A' 375 360 9.80      
8 A" 542 520 42.64      
9 A" 400 384 13.13      

Unscaled Zero Point Vibrational Energy (zpe) 6963.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 6680.8 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/cc-pVDZ
ABC
21.26626 0.31692 0.31226

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.122 0.000
C2 0.238 1.319 0.000
O3 -0.301 -1.170 0.000
H4 0.441 2.374 0.000
H5 0.537 -1.656 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.22051.32672.29531.8575
C21.22052.54691.07492.9901
O31.32672.54693.62150.9686
H42.29531.07493.62154.0319
H51.85752.99010.96864.0319

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.620 C1 O3 H5 107.011
C2 C1 O3 178.147
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability