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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-22.325138
Energy at 298.15K-22.327683
HF Energy-22.325138
Nuclear repulsion energy32.025062
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' 3756 3394 17.46      
2 A' 3635 3284 79.29      
3 A' 2378 2148 99.33      
4 A' 1819 1643 40.08      
5 A' 1106 999 9.86      
6 A' 812 733 251.39      
7 A' 706 638 99.01      
8 A' 504 455 41.39      
9 A" 3848 3477 27.28      
10 A" 1334 1206 0.69      
11 A" 868 784 47.84      
12 A" 422 381 11.43      

Unscaled Zero Point Vibrational Energy (zpe) 10594.1 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 9570.7 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
10.17539 0.31240 0.30631

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 -0.093 1.356 0.000
C2 0.000 0.169 0.000
N3 0.164 -1.190 0.000
H4 -0.173 2.412 0.000
H5 -0.211 -1.619 0.823
H6 -0.211 -1.619 -0.823

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.19102.55911.05853.08923.0892
C21.19101.36862.24951.97941.9794
N32.55911.36863.61731.00091.0009
H41.05852.24953.61734.11404.1140
H53.08921.97941.00094.11401.6454
H63.08921.97941.00094.11401.6454

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 177.565 C2 C1 H4 179.887
C2 N3 H5 112.376 C2 N3 H6 112.376
H5 N3 H6 110.563
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 -0.480      
2 C -0.072      
3 N -0.541      
4 H 0.342      
5 H 0.376      
6 H 0.376      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.328 -1.196 0.000 1.787
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.773 1.945 0.000
y 1.945 -11.899 0.000
z 0.000 0.000 -17.177
Traceless
 xyz
x -6.235 1.945 0.000
y 1.945 7.076 0.000
z 0.000 0.000 -0.841
Polar
3z2-r2-1.682
x2-y2-8.874
xy1.945
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.310 -0.219 0.000
y -0.219 6.209 0.000
z 0.000 0.000 2.514


<r2> (average value of r2) Å2
<r2> 37.629
(<r2>)1/2 6.134