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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: HF/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 HF/STO-3G
 hartrees
Energy at 0K-130.176812
Energy at 298.15K-130.179322
HF Energy-130.176812
Nuclear repulsion energy59.120381
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/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' 3958 3232 173.01      
2 A' 3921 3202 5.42      
3 A' 2725 2225 1.75      
4 A' 1963 1603 9.37      
5 A' 1163 950 12.31      
6 A' 918 750 161.82      
7 A' 857 700 24.89      
8 A' 498 406 15.83      
9 A" 4103 3350 2.34      
10 A" 1451 1185 0.57      
11 A" 957 781 11.76      
12 A" 451 368 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 11482.1 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 9375.1 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/STO-3G
ABC
9.34774 0.30822 0.30280

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.106 1.354 0.000
C2 0.000 0.189 0.000
N3 0.193 -1.204 0.000
H4 -0.207 2.411 0.000
H5 -0.255 -1.620 0.831
H6 -0.255 -1.620 -0.831

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.16982.57581.06223.09133.0913
C21.16981.40672.23202.00682.0068
N32.57581.40673.63781.03131.0313
H41.06222.23203.63784.11634.1163
H53.09132.00681.03134.11631.6612
H63.09132.00681.03134.11631.6612

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 177.307 C2 C1 H4 179.778
C2 N3 H5 109.836 C2 N3 H6 109.836
H5 N3 H6 107.292
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.143      
2 C 0.040      
3 N -0.377      
4 H 0.104      
5 H 0.188      
6 H 0.188      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.541 -0.562 0.000 1.640
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.836 2.097 0.000
y 2.097 -12.821 0.000
z 0.000 0.000 -15.587
Traceless
 xyz
x -3.632 2.097 0.000
y 2.097 3.891 0.000
z 0.000 0.000 -0.259
Polar
3z2-r2-0.518
x2-y2-5.016
xy2.097
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.446 -0.053 0.000
y -0.053 3.794 0.000
z 0.000 0.000 1.047


<r2> (average value of r2) Å2
<r2> 43.940
(<r2>)1/2 6.629