return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: HF/TZVP

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/TZVP
 hartrees
Energy at 0K-131.899506
Energy at 298.15K-131.901986
HF Energy-131.899506
Nuclear repulsion energy60.095822
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/TZVP
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' 3770 3425 32.51      
2 A' 3635 3302 103.21      
3 A' 2405 2185 119.33      
4 A' 1785 1622 40.74      
5 A' 1129 1026 18.25      
6 A' 681 618 248.16      
7 A' 660 599 78.50      
8 A' 506 459 69.19      
9 A" 3865 3512 47.15      
10 A" 1311 1191 0.04      
11 A" 842 765 46.05      
12 A" 425 386 12.20      

Unscaled Zero Point Vibrational Energy (zpe) 10505.4 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 9545.2 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/TZVP
ABC
10.53997 0.31810 0.31126

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.087 1.346 0.000
C2 0.000 0.167 0.000
N3 0.147 -1.175 0.000
H4 -0.162 2.397 0.000
H5 -0.173 -1.626 0.828
H6 -0.173 -1.626 -0.828

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.18272.53211.05343.08693.0869
C21.18271.34982.23611.98251.9825
N32.53211.34983.58530.99570.9957
H41.05342.23613.58534.10764.1076
H53.08691.98250.99574.10761.6559
H63.08691.98250.99574.10761.6559

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 177.966 C2 C1 H4 179.849
C2 N3 H5 114.556 C2 N3 H6 114.556
H5 N3 H6 112.519
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.531      
2 C 0.177      
3 N -0.304      
4 H 0.169      
5 H 0.244      
6 H 0.244      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.119 -1.328 0.000 1.737
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.894 1.651 0.000
y 1.651 -12.171 0.000
z 0.000 0.000 -17.223
Traceless
 xyz
x -6.197 1.651 0.000
y 1.651 6.888 0.000
z 0.000 0.000 -0.691
Polar
3z2-r2-1.381
x2-y2-8.723
xy1.651
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.491 -0.216 0.000
y -0.216 6.318 0.000
z 0.000 0.000 2.632


<r2> (average value of r2) Å2
<r2> 43.865
(<r2>)1/2 6.623