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: B2PLYP/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/6-31G
 hartrees
Energy at 0K-132.458501
Energy at 298.15K-132.460109
HF Energy-132.359995
Nuclear repulsion energy59.070887
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 B2PLYP/6-31G
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' 3653 3653 36.81      
2 A' 3530 3530 73.44      
3 A' 2239 2239 93.23      
4 A' 1720 1720 50.23      
5 A' 1107 1107 18.36      
6 A' 479 479 6.79      
7 A' 313 313 520.42      
8 A' 227 227 63.02      
9 A" 3774 3774 41.29      
10 A" 1196 1196 8.31      
11 A" 681 681 46.06      
12 A" 341 341 8.38      

Unscaled Zero Point Vibrational Energy (zpe) 9630.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9630.5 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 B2PLYP/6-31G
ABC
11.28057 0.30661 0.29849

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 1.385 0.000
C2 0.000 0.163 0.000
N3 -0.002 -1.188 0.000
H4 0.005 2.447 0.000
H5 -0.003 -1.706 0.861
H6 -0.003 -1.706 -0.861

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.22192.57301.06253.20853.2085
C21.22191.35122.28442.05772.0577
N32.57301.35123.63551.00471.0047
H41.06252.28443.63554.24164.2416
H53.20852.05771.00474.24161.7221
H63.20852.05771.00474.24161.7221

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 179.958 C2 C1 H4 179.980
C2 N3 H5 121.019 C2 N3 H6 121.019
H5 N3 H6 117.962
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.213      
2 C 0.120      
3 N -0.831      
4 H 0.237      
5 H 0.343      
6 H 0.343      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.004 -1.740 0.000 1.740
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.347 0.019 0.000
y 0.019 -11.297 0.000
z 0.000 0.000 -16.412
Traceless
 xyz
x -6.492 0.019 0.000
y 0.019 7.082 0.000
z 0.000 0.000 -0.590
Polar
3z2-r2-1.180
x2-y2-9.050
xy0.019
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.280 0.011 0.000
y 0.011 6.132 0.000
z 0.000 0.000 1.908


<r2> (average value of r2) Å2
<r2> 44.846
(<r2>)1/2 6.697