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All results from a given calculation for HCCOH (ethynol)

using model chemistry: MP2/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/SDD
 hartrees
Energy at 0K-151.921905
Energy at 298.15K-151.922552
HF Energy-151.620776
Nuclear repulsion energy56.345487
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 MP2/SDD
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' 3658 3531 83.77      
2 A' 3503 3381 62.55      
3 A' 2150 2075 75.93      
4 A' 1240 1197 123.41      
5 A' 967 934 82.48      
6 A' 632 610 69.63      
7 A' 351 339 14.49      
8 A" 573 553 82.45      
9 A" 371 358 0.98      

Unscaled Zero Point Vibrational Energy (zpe) 6722.2 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 6488.9 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 MP2/SDD
ABC
22.70512 0.30291 0.29892

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.134 0.000
C2 0.011 1.372 0.000
O3 -0.107 -1.225 0.000
H4 0.029 2.441 0.000
H5 0.765 -1.680 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.23821.36292.30691.9688
C21.23822.59951.06863.1440
O31.36292.59953.66780.9844
H42.30691.06863.66784.1859
H51.96883.14400.98444.1859

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.539 C1 O3 H5 113.031
C2 C1 O3 175.981
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability