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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-131.404420
Energy at 298.15K-131.406291
HF Energy-131.120898
Nuclear repulsion energy59.007303
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 MP2/3-21G*
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' 3585 3410 43.03      
2 A' 3515 3344 67.96      
3 A' 2235 2126 79.94      
4 A' 1744 1659 46.87      
5 A' 1084 1031 18.87      
6 A' 517 492 29.89      
7 A' 435 413 59.46      
8 A' 219 209 438.55      
9 A" 3696 3516 41.58      
10 A" 1216 1157 6.33      
11 A" 740 704 40.96      
12 A" 438 416 11.32      

Unscaled Zero Point Vibrational Energy (zpe) 9710.5 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 9237.6 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 MP2/3-21G*
ABC
10.97963 0.30643 0.29848

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.036 1.384 0.000
C2 0.000 0.162 0.000
N3 0.059 -1.189 0.000
H4 -0.070 2.445 0.000
H5 -0.066 -1.700 0.863
H6 -0.066 -1.700 -0.863

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.22202.57481.06203.20303.2030
C21.22201.35292.28402.05412.0541
N32.57481.35293.63681.01081.0108
H41.06202.28403.63684.23474.2347
H53.20302.05411.01084.23471.7258
H63.20302.05411.01084.23471.7258

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 179.156 C2 C1 H4 179.823
C2 N3 H5 119.998 C2 N3 H6 119.998
H5 N3 H6 117.220
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability