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All results from a given calculation for HCCOH (ethynol)

using model chemistry: CCD/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 CCD/cc-pVDZ
 hartrees
Energy at 0K-152.129985
Energy at 298.15K-152.130756
HF Energy-151.678371
Nuclear repulsion energy57.601347
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 CCD/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' 3855 3688 110.41      
2 A' 3508 3357 82.36      
3 A' 2293 2194 99.93      
4 A' 1314 1257 93.20      
5 A' 1081 1035 76.30      
6 A' 645 617 40.33      
7 A' 388 371 10.20      
8 A" 560 536 46.27      
9 A" 419 401 9.07      

Unscaled Zero Point Vibrational Energy (zpe) 7031.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 6727.4 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 CCD/cc-pVDZ
ABC
21.35005 0.31800 0.31333

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/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 1.316 0.000
O3 -0.301 -1.168 0.000
H4 0.442 2.371 0.000
H5 0.535 -1.656 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21731.32522.29181.8568
C21.21732.54211.07452.9866
O31.32522.54213.61640.9674
H42.29181.07453.61644.0280
H51.85682.98660.96744.0280

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.639 C1 O3 H5 107.146
C2 C1 O3 178.166
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability