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/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-131.902379
Energy at 298.15K-131.904866
HF Energy-131.902379
Nuclear repulsion energy60.128917
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/6-311+G(3df,2p)
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' 3774 3429 30.68      
2 A' 3621 3290 100.50      
3 A' 2392 2173 131.05      
4 A' 1775 1613 32.50      
5 A' 1129 1026 17.94      
6 A' 694 630 211.81      
7 A' 655 595 61.07      
8 A' 509 462 64.86      
9 A" 3866 3513 50.35      
10 A" 1304 1185 0.68      
11 A" 837 761 43.61      
12 A" 429 389 11.55      

Unscaled Zero Point Vibrational Energy (zpe) 10491.5 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 9532.6 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/6-311+G(3df,2p)
ABC
10.53593 0.31842 0.31166

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.085 1.346 0.000
C2 0.000 0.167 0.000
N3 0.147 -1.175 0.000
H4 -0.161 2.396 0.000
H5 -0.180 -1.624 0.826
H6 -0.180 -1.624 -0.826

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.18192.53101.05293.08353.0835
C21.18191.34952.23481.97991.9799
N32.53101.34953.58380.99510.9951
H41.05292.23483.58384.10354.1035
H53.08351.97990.99514.10351.6513
H63.08351.97990.99514.10351.6513

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 177.863 C2 C1 H4 179.997
C2 N3 H5 114.378 C2 N3 H6 114.378
H5 N3 H6 112.139
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.113      
2 C 0.185      
3 N -0.929      
4 H 0.230      
5 H 0.200      
6 H 0.200      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.025 -1.322 0.000 1.673
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.928 1.566 0.000
y 1.566 -12.204 0.000
z 0.000 0.000 -17.358
Traceless
 xyz
x -6.147 1.566 0.000
y 1.566 6.939 0.000
z 0.000 0.000 -0.792
Polar
3z2-r2-1.584
x2-y2-8.724
xy1.566
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.542 -0.184 0.000
y -0.184 6.600 0.000
z 0.000 0.000 3.556


<r2> (average value of r2) Å2
<r2> 43.864
(<r2>)1/2 6.623