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All results from a given calculation for HCCOH (ethynol)

using model chemistry: CCSD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-152.100689
Energy at 298.15K-152.101221
HF Energy-151.658852
Nuclear repulsion energy57.663782
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3745 3536 86.82      
2 A' 3519 3323 69.22      
3 A' 2303 2175 79.33      
4 A' 1309 1236 113.64      
5 A' 1077 1017 71.14      
6 A' 590 557 45.97      
7 A' 328 310 9.85      
8 A" 518 489 33.37      
9 A" 327 309 26.79      

Unscaled Zero Point Vibrational Energy (zpe) 6857.5 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 6475.5 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/6-31G*
ABC
21.63032 0.31881 0.31418

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.127 0.000
C2 0.167 1.324 0.000
O3 -0.242 -1.179 0.000
H4 0.323 2.379 0.000
H5 0.608 -1.655 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20891.32842.27531.8824
C21.20892.53661.06653.0113
O31.32842.53663.60300.9733
H42.27531.06653.60304.0439
H51.88243.01130.97334.0439

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.527 C1 O3 H5 108.760
C2 C1 O3 177.462
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability