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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-131.424536
Energy at 298.15K-131.426432
HF Energy-131.120998
Nuclear repulsion energy58.994832
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 QCISD/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' 3553 3415 32.07      
2 A' 3457 3322 60.65      
3 A' 2229 2143 74.54      
4 A' 1730 1663 46.37      
5 A' 1080 1038 19.17      
6 A' 516 496 41.36      
7 A' 477 459 60.86      
8 A' 210 202 435.77      
9 A" 3658 3515 31.95      
10 A" 1206 1159 5.31      
11 A" 762 732 33.69      
12 A" 433 416 11.78      

Unscaled Zero Point Vibrational Energy (zpe) 9655.7 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 9280.1 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 QCISD/3-21G*
ABC
10.94217 0.30646 0.29849

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.051 1.382 0.000
C2 0.000 0.164 0.000
N3 0.071 -1.189 0.000
H4 -0.089 2.448 0.000
H5 -0.051 -1.702 0.864
H6 -0.051 -1.702 -0.864

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.21932.57391.06603.20293.2029
C21.21931.35462.28532.05692.0569
N32.57391.35463.63991.01241.0124
H41.06602.28533.63994.23874.2387
H53.20292.05691.01244.23871.7284
H63.20292.05691.01244.23871.7284

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 179.396 C2 C1 H4 179.640
C2 N3 H5 119.991 C2 N3 H6 119.991
H5 N3 H6 117.220
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability