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: CCD/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 CCD/6-31G
 hartrees
Energy at 0K-132.100650
Energy at 298.15K-132.102332
HF Energy-131.796516
Nuclear repulsion energy58.679597
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 CCD/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' 3646 3498 34.28      
2 A' 3464 3324 54.34      
3 A' 2246 2155 81.48      
4 A' 1741 1670 52.16      
5 A' 1081 1037 18.77      
6 A' 524 503 91.38      
7 A' 371 356 22.74      
8 A' 235 226 467.46      
9 A" 3764 3611 34.85      
10 A" 1212 1163 6.78      
11 A" 650 623 44.95      
12 A" 327 313 6.98      

Unscaled Zero Point Vibrational Energy (zpe) 9629.6 cm-1
Scaled (by 0.9595) Zero Point Vibrational Energy (zpe) 9239.6 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 CCD/6-31G
ABC
10.93388 0.30240 0.29474

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.264 1.367 0.000
C2 0.000 0.170 0.000
N3 -0.173 -1.187 0.000
H4 0.357 2.434 0.000
H5 -0.364 -1.674 0.861
H6 -0.364 -1.674 -0.861

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.22572.59111.07063.22243.2224
C21.22571.36812.29142.06762.0676
N32.59111.36813.65911.00771.0077
H41.07062.29143.65914.25844.2584
H53.22242.06761.00774.25841.7225
H63.22242.06761.00774.25841.7225

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 174.842 C2 C1 H4 172.573
C2 N3 H5 120.226 C2 N3 H6 120.226
H5 N3 H6 117.455
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability