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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: MP2/CEP-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 MP2/CEP-31G
 hartrees
Energy at 0K-22.510120
Energy at 298.15K-22.511848
HF Energy-22.247173
Nuclear repulsion energy30.870039
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-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' 3632 3510 37.91      
2 A' 3471 3354 62.15      
3 A' 2161 2088 100.80      
4 A' 1702 1645 46.94      
5 A' 1040 1005 20.27      
6 A' 559 540 124.31      
7 A' 356 344 1.76      
8 A' 245 237 459.99      
9 A" 3772 3645 38.62      
10 A" 1185 1145 5.36      
11 A" 709 685 77.18      
12 A" 333 322 8.64      

Unscaled Zero Point Vibrational Energy (zpe) 9582.2 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 9259.3 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-31G
ABC
10.74326 0.28761 0.28050

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.024 1.434 0.000
C2 0.000 0.161 0.000
N3 0.014 -1.230 0.000
H4 0.041 2.509 0.000
H5 -0.143 -1.732 0.871
H6 -0.143 -1.732 -0.871

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.27352.66451.07503.28823.2882
C21.27351.39132.34842.08872.0887
N32.66451.39133.73941.01721.0172
H41.07502.34843.73944.33364.3336
H53.28822.08871.01724.33361.7412
H63.28822.08871.01724.33361.7412

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 178.320 C2 C1 H4 179.788
C2 N3 H5 119.462 C2 N3 H6 119.462
H5 N3 H6 117.708
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability