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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-22.271913
Energy at 298.15K-22.274129
HF Energy-22.271913
Nuclear repulsion energy31.993450
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 HF/CEP-121G
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' 3826 3491 38.17      
2 A' 3634 3316 90.72      
3 A' 2343 2138 135.92      
4 A' 1805 1647 59.38      
5 A' 1142 1042 22.36      
6 A' 709 647 160.67      
7 A' 547 499 1.98      
8 A' 274 250 470.47      
9 A" 3973 3625 48.98      
10 A" 1268 1157 4.28      
11 A" 904 825 55.14      
12 A" 424 387 24.17      

Unscaled Zero Point Vibrational Energy (zpe) 10424.1 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 9512.0 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 HF/CEP-121G
ABC
11.48163 0.31114 0.30293

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 1.371 0.000
C2 0.000 0.168 0.000
N3 -0.000 -1.184 0.000
H4 0.001 2.425 0.000
H5 -0.001 -1.688 0.853
H6 -0.001 -1.688 -0.853

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.20312.55531.05313.17623.1762
C21.20311.35222.25622.04312.0431
N32.55531.35223.60840.99120.9912
H41.05312.25623.60844.20014.2001
H53.17622.04310.99124.20011.7069
H63.17622.04310.99124.20011.7069

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 179.989 C2 C1 H4 179.976
C2 N3 H5 120.569 C2 N3 H6 120.569
H5 N3 H6 118.862
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.706      
2 C 0.180      
3 N -0.486      
4 H 0.286      
5 H 0.363      
6 H 0.363      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.002 -1.621 0.000 1.621
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.189 0.003 0.000
y 0.003 -11.445 0.000
z 0.000 0.000 -16.945
Traceless
 xyz
x -6.995 0.003 0.000
y 0.003 7.622 0.000
z 0.000 0.000 -0.628
Polar
3z2-r2-1.255
x2-y2-9.745
xy0.003
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.003 0.002 0.000
y 0.002 6.249 0.000
z 0.000 0.000 2.216


<r2> (average value of r2) Å2
<r2> 37.999
(<r2>)1/2 6.164