return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCOH (ethynol)

using model chemistry: QCISD(T)/6-311G**

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(T)/6-311G**
 hartrees
Energy at 0K-152.207308
Energy at 298.15K-152.207974
HF Energy-151.707282
Nuclear repulsion energy57.823488
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)/6-311G**
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' 3850 3850        
2 A' 3493 3493        
3 A' 2235 2235        
4 A' 1296 1296        
5 A' 1064 1064        
6 A' 617 617        
7 A' 368 368        
8 A" 530 530        
9 A" 372 372        

Unscaled Zero Point Vibrational Energy (zpe) 6912.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6912.1 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)/6-311G**
ABC
21.60316 0.32031 0.31563

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.122 0.000
C2 0.219 1.315 0.000
O3 -0.283 -1.168 0.000
H4 0.402 2.364 0.000
H5 0.554 -1.645 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21251.32122.27751.8520
C21.21252.53331.06502.9789
O31.32122.53333.59800.9632
H42.27751.06503.59804.0120
H51.85202.97890.96324.0120

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.528 C1 O3 H5 107.294
C2 C1 O3 178.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability