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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: HF/CEP-31G*

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-31G*
 hartrees
Energy at 0K-22.301077
Energy at 298.15K-22.303557
HF Energy-22.301077
Nuclear repulsion energy31.719585
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-31G*
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' 3778 3393 24.36      
2 A' 3669 3295 96.58      
3 A' 2415 2169 108.22      
4 A' 1804 1620 37.85      
5 A' 1116 1002 13.64      
6 A' 796 715 235.87      
7 A' 659 592 148.16      
8 A' 487 437 23.45      
9 A" 3878 3482 36.48      
10 A" 1318 1183 1.03      
11 A" 844 758 50.52      
12 A" 415 372 8.01      

Unscaled Zero Point Vibrational Energy (zpe) 10588.9 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 9508.8 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-31G*
ABC
10.11705 0.30536 0.29946

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.136 1.375 0.000
C2 0.000 0.160 0.000
N3 0.198 -1.195 0.000
H4 -0.249 2.429 0.000
H5 -0.162 -1.637 0.827
H6 -0.162 -1.637 -0.827

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.22212.59171.06073.12303.1230
C21.22211.36992.28281.98451.9845
N32.59171.36993.65221.00391.0039
H41.06072.28283.65224.15024.1502
H53.12301.98451.00394.15021.6531
H63.12301.98451.00394.15021.6531

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 178.060 C2 C1 H4 179.761
C2 N3 H5 112.531 C2 N3 H6 112.531
H5 N3 H6 110.848
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.514      
2 C -0.208      
3 N -0.377      
4 H 0.365      
5 H 0.367      
6 H 0.367      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.304 -1.325 0.000 1.859
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.966 1.723 0.000
y 1.723 -11.794 0.000
z 0.000 0.000 -17.247
Traceless
 xyz
x -6.445 1.723 0.000
y 1.723 7.313 0.000
z 0.000 0.000 -0.868
Polar
3z2-r2-1.736
x2-y2-9.172
xy1.723
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.218 -0.385 0.000
y -0.385 6.264 0.000
z 0.000 0.000 2.444


<r2> (average value of r2) Å2
<r2> 38.229
(<r2>)1/2 6.183