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: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-132.527744
Energy at 298.15K-132.529576
HF Energy-132.527744
Nuclear repulsion energy58.925740
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 PBEPBE/6-31+G**
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' 3469 3429 10.40      
2 A' 3432 3393 97.28      
3 A' 2187 2162 137.44      
4 A' 1591 1573 31.92      
5 A' 1078 1066 17.78      
6 A' 558 552 193.01      
7 A' 462 457 118.41      
8 A' 267 264 56.70      
9 A" 3564 3523 40.95      
10 A" 1152 1138 0.16      
11 A" 621 614 56.24      
12 A" 344 340 6.86      

Unscaled Zero Point Vibrational Energy (zpe) 9362.1 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 9255.4 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 PBEPBE/6-31+G**
ABC
10.19405 0.30652 0.29979

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.008 1.381 0.000
C2 0.000 0.157 0.000
N3 0.083 -1.196 0.000
H4 -0.027 2.453 0.000
H5 -0.253 -1.656 0.846
H6 -0.253 -1.656 -0.846

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.22392.57841.07203.16183.1618
C21.22391.35552.29592.01652.0165
N32.57841.35553.65031.02011.0201
H41.07202.29593.65034.20084.2008
H53.16182.01651.02014.20081.6928
H63.16182.01651.02014.20081.6928

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 176.868 C2 C1 H4 179.386
C2 N3 H5 115.449 C2 N3 H6 115.449
H5 N3 H6 112.132
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.174      
2 C -0.296      
3 N -0.711      
4 H 0.198      
5 H 0.317      
6 H 0.317      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.089 -1.644 0.000 1.972
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.128 1.997 0.000
y 1.997 -12.362 0.000
z 0.000 0.000 -17.368
Traceless
 xyz
x -6.263 1.997 0.000
y 1.997 6.886 0.000
z 0.000 0.000 -0.623
Polar
3z2-r2-1.247
x2-y2-8.766
xy1.997
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.113 -0.038 0.000
y -0.038 7.632 0.000
z 0.000 0.000 2.985


<r2> (average value of r2) Å2
<r2> 45.298
(<r2>)1/2 6.730