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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-131.392013
Energy at 298.15K-131.393918
HF Energy-131.123116
Nuclear repulsion energy59.426204
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 CID/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' 3648 3399 43.30      
2 A' 3539 3297 72.25      
3 A' 2322 2164 93.76      
4 A' 1755 1635 55.03      
5 A' 1120 1044 24.52      
6 A' 596 555 112.08      
7 A' 536 499 0.95      
8 A' 115 107 455.13      
9 A" 3755 3498 45.30      
10 A" 1219 1135 8.00      
11 A" 830 774 36.28      
12 A" 462 430 14.71      

Unscaled Zero Point Vibrational Energy (zpe) 9948.8 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 9268.3 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 CID/3-21G
ABC
11.22875 0.31105 0.30266

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.373 0.000
C2 0.000 0.165 0.000
N3 -0.000 -1.180 0.000
H4 0.000 2.433 0.000
H5 -0.000 -1.697 0.863
H6 -0.000 -1.697 -0.863

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.20792.55301.06043.18903.1890
C21.20791.34512.26842.05232.0523
N32.55301.34513.61341.00601.0060
H41.06042.26843.61344.21964.2196
H53.18902.05231.00604.21961.7261
H63.18902.05231.00604.21961.7261

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 179.995 C2 C1 H4 179.991
C2 N3 H5 120.921 C2 N3 H6 120.921
H5 N3 H6 118.158
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability