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: MP3=FULL/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 MP3=FULL/6-31G*
 hartrees
Energy at 0K-152.105300
Energy at 298.15K-152.105983
HF Energy-151.659835
Nuclear repulsion energy57.891092
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 MP3=FULL/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' 3791 3557 99.22      
2 A' 3559 3339 77.30      
3 A' 2353 2208 87.55      
4 A' 1314 1233 117.63      
5 A' 1098 1030 76.13      
6 A' 620 582 48.51      
7 A' 371 348 10.49      
8 A" 539 505 41.05      
9 A" 392 368 21.98      

Unscaled Zero Point Vibrational Energy (zpe) 7018.3 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 6585.3 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 MP3=FULL/6-31G*
ABC
21.81517 0.32140 0.31673

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.131 0.000
C2 -0.291 1.298 0.000
O3 0.159 -1.190 0.000
H4 -0.636 2.301 0.000
H5 1.111 -1.352 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20201.33092.26151.8533
C21.20202.52801.06162.9976
O31.33092.52803.58100.9658
H42.26151.06163.58104.0498
H51.85332.99760.96584.0498

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 175.007 C1 O3 H5 106.507
C2 C1 O3 172.853
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability