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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: QCISD(T)/cc-pVTZ

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(T)/cc-pVTZ
 hartrees
Energy at 0K-132.458867
Energy at 298.15K-132.460984
HF Energy-131.900862
Nuclear repulsion energy59.152645
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(T)/cc-pVTZ
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' 3541 3359        
2 A' 3481 3302        
3 A' 2203 2090        
4 A' 1647 1563        
5 A' 1054 1000        
6 A' 722 685        
7 A' 496 470        
8 A' 386 366        
9 A" 3630 3443        
10 A" 1223 1160        
11 A" 650 616        
12 A" 344 326        

Unscaled Zero Point Vibrational Energy (zpe) 9688.2 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 9190.3 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 QCISD(T)/cc-pVTZ
ABC
9.99456 0.30810 0.30217

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.032 1.373 0.000
C2 0.000 0.162 0.000
N3 0.118 -1.201 0.000
H4 -0.067 2.434 0.000
H5 -0.284 -1.619 0.827
H6 -0.284 -1.619 -0.827

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.21142.57771.06163.11463.1146
C21.21141.36752.27291.98431.9843
N32.57771.36753.63901.01051.0105
H41.06162.27293.63904.14244.1424
H53.11461.98431.01054.14241.6550
H63.11461.98431.01054.14241.6550

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 176.561 C2 C1 H4 179.625
C2 N3 H5 112.246 C2 N3 H6 112.246
H5 N3 H6 109.938
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability