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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-22.552973
Energy at 298.15K-22.554787
HF Energy-22.266675
Nuclear repulsion energy31.230445
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 MP2/CEP-121G
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' 3569 3483 27.38      
2 A' 3427 3345 56.81      
3 A' 2134 2083 95.27      
4 A' 1720 1679 47.32      
5 A' 1034 1009 14.63      
6 A' 489 477 100.34      
7 A' 344 336 29.72      
8 A' 330 322 385.66      
9 A" 3707 3618 29.08      
10 A" 1199 1170 3.18      
11 A" 701 685 57.31      
12 A" 352 343 12.86      

Unscaled Zero Point Vibrational Energy (zpe) 9502.3 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 9274.3 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 MP2/CEP-121G
ABC
10.73171 0.29565 0.28842

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.093 1.406 0.000
C2 0.000 0.167 0.000
N3 -0.028 -1.217 0.000
H4 0.132 2.476 0.000
H5 -0.248 -1.699 0.863
H6 -0.248 -1.699 -0.863

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.24262.62561.07013.24123.2412
C21.24261.38392.31232.07112.0711
N32.62561.38393.69561.01281.0128
H41.07012.31233.69564.28024.2802
H53.24122.07111.01284.28021.7254
H63.24122.07111.01284.28021.7254

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 176.861 C2 C1 H4 177.825
C2 N3 H5 118.752 C2 N3 H6 118.752
H5 N3 H6 116.812
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability