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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-132.229205
Energy at 298.15K-132.231312
HF Energy-131.844636
Nuclear repulsion energy59.323515
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 CISD/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' 3630 3360 16.47      
2 A' 3582 3316 74.44      
3 A' 2339 2165 66.65      
4 A' 1736 1607 35.10      
5 A' 1102 1020 9.49      
6 A' 751 696 264.19      
7 A' 513 475 84.08      
8 A' 355 329 21.91      
9 A" 3723 3446 26.78      
10 A" 1270 1176 0.00      
11 A" 660 611 40.91      
12 A" 349 323 1.74      

Unscaled Zero Point Vibrational Energy (zpe) 10004.9 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 9262.5 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 CISD/6-31G*
ABC
10.08288 0.31005 0.30391

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.042 1.367 0.000
C2 0.000 0.165 0.000
N3 0.126 -1.195 0.000
H4 -0.114 2.426 0.000
H5 -0.257 -1.626 0.829
H6 -0.257 -1.626 -0.829

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.20272.56741.06203.11323.1132
C21.20271.36572.26431.99031.9903
N32.56741.36573.62931.01001.0100
H41.06202.26433.62934.13894.1389
H53.11321.99031.01004.13891.6583
H63.11321.99031.01004.13891.6583

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 176.713 C2 C1 H4 178.089
C2 N3 H5 112.960 C2 N3 H6 112.960
H5 N3 H6 110.362
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability