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: LSDA/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 LSDA/6-31+G**
 hartrees
Energy at 0K-131.948716
Energy at 298.15K-131.950489
HF Energy-131.948716
Nuclear repulsion energy59.289614
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 LSDA/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' 3497 3445 29.04      
2 A' 3422 3371 116.19      
3 A' 2224 2190 155.82      
4 A' 1564 1540 41.39      
5 A' 1122 1105 20.26      
6 A' 489 482 3.31      
7 A' 408 402 328.01      
8 A' 281 276 66.07      
9 A" 3597 3543 66.81      
10 A" 1116 1099 1.73      
11 A" 630 620 57.14      
12 A" 359 353 9.82      

Unscaled Zero Point Vibrational Energy (zpe) 9353.9 cm-1
Scaled (by 0.985) Zero Point Vibrational Energy (zpe) 9213.5 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 LSDA/6-31+G**
ABC
10.49996 0.31105 0.30350

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.029 1.373 0.000
C2 0.000 0.153 0.000
N3 0.084 -1.180 0.000
H4 -0.069 2.446 0.000
H5 -0.171 -1.671 0.856
H6 -0.171 -1.671 -0.856

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.21962.55501.07433.16513.1651
C21.21961.33592.29392.02272.0227
N32.55501.33593.62931.01941.0194
H41.07432.29393.62934.20684.2068
H53.16512.02271.01944.20681.7121
H63.16512.02271.01944.20681.7121

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 177.780 C2 C1 H4 179.280
C2 N3 H5 117.731 C2 N3 H6 117.731
H5 N3 H6 114.219
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.131      
2 C -0.277      
3 N -0.739      
4 H 0.218      
5 H 0.333      
6 H 0.333      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.875 -1.859 0.000 2.054
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.306 1.457 0.000
y 1.457 -11.879 0.000
z 0.000 0.000 -17.199
Traceless
 xyz
x -6.767 1.457 0.000
y 1.457 7.373 0.000
z 0.000 0.000 -0.607
Polar
3z2-r2-1.213
x2-y2-9.427
xy1.457
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.072 -0.111 0.000
y -0.111 7.625 0.000
z 0.000 0.000 2.916


<r2> (average value of r2) Å2
<r2> 44.834
(<r2>)1/2 6.696