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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-131.906667
Energy at 298.15K-131.909040
HF Energy-131.906667
Nuclear repulsion energy59.566833
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 B3PW91/3-21G
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' 3563 3425 27.60      
2 A' 3522 3386 91.78      
3 A' 2289 2201 100.65      
4 A' 1687 1621 54.33      
5 A' 1146 1102 17.34      
6 A' 722 694 128.08      
7 A' 567 545 10.05      
8 A' 372 358 410.94      
9 A" 3663 3521 45.78      
10 A" 1182 1136 9.95      
11 A" 894 860 29.35      
12 A" 481 463 21.61      

Unscaled Zero Point Vibrational Energy (zpe) 10044.2 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 9654.5 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 B3PW91/3-21G
ABC
11.14071 0.31347 0.30489

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.369 0.000
C2 0.000 0.158 0.000
N3 -0.001 -1.172 0.000
H4 0.001 2.430 0.000
H5 0.001 -1.696 0.866
H6 0.001 -1.696 -0.866

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.21102.54181.06073.18523.1852
C21.21101.33092.27172.04662.0466
N32.54181.33093.60251.01221.0122
H41.06072.27173.60254.21584.2158
H53.18522.04661.01224.21581.7329
H63.18522.04661.01224.21581.7329

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 179.986 C2 C1 H4 179.942
C2 N3 H5 121.131 C2 N3 H6 121.131
H5 N3 H6 117.738
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.041      
2 C 0.136      
3 N -1.016      
4 H 0.260      
5 H 0.330      
6 H 0.330      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.006 -2.072 0.000 2.072
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.168 -0.003 0.000
y -0.003 -10.837 0.000
z 0.000 0.000 -16.368
Traceless
 xyz
x -6.565 -0.003 0.000
y -0.003 7.431 0.000
z 0.000 0.000 -0.866
Polar
3z2-r2-1.731
x2-y2-9.330
xy-0.003
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.018 0.001 0.000
y 0.001 5.998 0.000
z 0.000 0.000 1.715


<r2> (average value of r2) Å2
<r2> 44.045
(<r2>)1/2 6.637