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: B1B95/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/cc-pVTZ
 hartrees
Energy at 0K-132.673467
Energy at 298.15K-132.675661
HF Energy-132.673467
Nuclear repulsion energy59.775716
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 B1B95/cc-pVTZ
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' 3575 3421 17.15      
2 A' 3505 3355 91.42      
3 A' 2270 2172 119.73      
4 A' 1639 1569 28.37      
5 A' 1100 1053 16.82      
6 A' 619 592 184.88      
7 A' 504 482 120.11      
8 A' 443 424 9.49      
9 A" 3663 3506 37.59      
10 A" 1200 1149 0.03      
11 A" 708 677 38.44      
12 A" 377 361 8.73      

Unscaled Zero Point Vibrational Energy (zpe) 9800.9 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 9380.5 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 B1B95/cc-pVTZ
ABC
10.36667 0.31542 0.30867

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.031 1.358 0.000
C2 0.000 0.160 0.000
N3 0.105 -1.181 0.000
H4 -0.066 2.416 0.000
H5 -0.240 -1.629 0.833
H6 -0.240 -1.629 -0.833

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.19882.54231.05863.10753.1075
C21.19881.34432.25741.98711.9871
N32.54231.34433.60071.00641.0064
H41.05862.25743.60074.13314.1331
H53.10751.98711.00644.13311.6653
H63.10751.98711.00644.13311.6653

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 177.025 C2 C1 H4 179.622
C2 N3 H5 114.654 C2 N3 H6 114.654
H5 N3 H6 111.658
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.443      
2 C 0.172      
3 N -0.223      
4 H 0.144      
5 H 0.175      
6 H 0.175      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.006 -1.535 0.000 1.836
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.226 1.748 0.000
y 1.748 -12.123 0.000
z 0.000 0.000 -16.981
Traceless
 xyz
x -5.674 1.748 0.000
y 1.748 6.481 0.000
z 0.000 0.000 -0.807
Polar
3z2-r2-1.613
x2-y2-8.104
xy1.748
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.833 -0.030 0.000
y -0.030 6.843 0.000
z 0.000 0.000 3.029


<r2> (average value of r2) Å2
<r2> 43.976
(<r2>)1/2 6.631