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: PBEPBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/STO-3G
 hartrees
Energy at 0K-130.813021
Energy at 298.15K-130.814955
HF Energy-130.813021
Nuclear repulsion energy57.793854
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 PBEPBE/STO-3G
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' 3629 3316 158.73      
2 A' 3421 3126 1.86      
3 A' 2368 2163 7.47      
4 A' 1752 1600 8.13      
5 A' 1072 979 9.42      
6 A' 710 649 155.41      
7 A' 534 487 36.50      
8 A' 372 340 8.71      
9 A" 3598 3287 0.01      
10 A" 1296 1184 0.41      
11 A" 707 646 15.53      
12 A" 343 313 2.52      

Unscaled Zero Point Vibrational Energy (zpe) 9900.8 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 9045.3 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 PBEPBE/STO-3G
ABC
8.68499 0.29623 0.29137

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.128 1.386 0.000
C2 0.000 0.176 0.000
N3 0.013 -1.239 0.000
H4 0.215 2.466 0.000
H5 -0.535 -1.583 0.847
H6 -0.535 -1.583 -0.847

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.21672.62801.08293.15793.1579
C21.21671.41562.29952.02432.0243
N32.62801.41563.71041.06511.0651
H41.08292.29953.71044.20374.2037
H53.15792.02431.06514.20371.6933
H63.15792.02431.06514.20371.6933

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 173.469 C2 C1 H4 178.624
C2 N3 H5 108.553 C2 N3 H6 108.553
H5 N3 H6 105.284
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.161      
2 C -0.002      
3 N -0.347      
4 H 0.112      
5 H 0.199      
6 H 0.199      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.642 -0.768 0.000 1.813
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.055 2.968 0.000
y 2.968 -12.785 0.000
z 0.000 0.000 -15.553
Traceless
 xyz
x -2.886 2.968 0.000
y 2.968 3.519 0.000
z 0.000 0.000 -0.633
Polar
3z2-r2-1.265
x2-y2-4.270
xy2.968
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.613 0.539 0.000
y 0.539 4.317 0.000
z 0.000 0.000 1.126


<r2> (average value of r2) Å2
<r2> 45.159
(<r2>)1/2 6.720