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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: CCD/3-21G*

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/3-21G*
 hartrees
Energy at 0K-131.419688
Energy at 298.15K-131.421687
HF Energy-131.121338
Nuclear repulsion energy59.057742
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/3-21G*
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' 3565 3410 30.13      
2 A' 3471 3320 61.24      
3 A' 2271 2172 77.74      
4 A' 1738 1662 47.86      
5 A' 1082 1035 20.17      
6 A' 552 528 75.29      
7 A' 489 468 19.16      
8 A' 252 241 438.88      
9 A" 3668 3509 30.62      
10 A" 1215 1162 5.23      
11 A" 765 732 37.26      
12 A" 441 422 11.34      

Unscaled Zero Point Vibrational Energy (zpe) 9754.1 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 9329.8 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/3-21G*
ABC
10.88703 0.30715 0.29926

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.058 1.379 0.000
C2 0.000 0.165 0.000
N3 0.082 -1.188 0.000
H4 -0.103 2.444 0.000
H5 -0.064 -1.697 0.862
H6 -0.064 -1.697 -0.862

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.21532.57131.06543.19533.1953
C21.21531.35602.28072.05372.0537
N32.57131.35603.63661.01201.0120
H41.06542.28073.63664.23024.2302
H53.19532.05371.01204.23021.7243
H63.19532.05371.01204.23021.7243

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 179.237 C2 C1 H4 179.736
C2 N3 H5 119.578 C2 N3 H6 119.578
H5 N3 H6 116.849
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability