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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: QCISD(T)/6-311+G(3df,2p)

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)/6-311+G(3df,2p)
 hartrees
Energy at 0K-132.456518
Energy at 298.15K-132.458621
HF Energy-131.899782
Nuclear repulsion energy59.163430
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)/6-311+G(3df,2p)
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' 3552 3387        
2 A' 3466 3306        
3 A' 2195 2093        
4 A' 1649 1572        
5 A' 1055 1006        
6 A' 690 658        
7 A' 498 475        
8 A' 392 373        
9 A" 3643 3475        
10 A" 1211 1155        
11 A" 658 627        
12 A" 338 323        

Unscaled Zero Point Vibrational Energy (zpe) 9672.6 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 9224.8 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)/6-311+G(3df,2p)
ABC
10.07815 0.30834 0.30219

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.021 1.373 0.000
C2 0.000 0.162 0.000
N3 0.105 -1.199 0.000
H4 -0.044 2.436 0.000
H5 -0.281 -1.626 0.831
H6 -0.281 -1.626 -0.831

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.21112.57501.06363.12313.1231
C21.21111.36502.27471.99201.9920
N32.57501.36503.63831.01121.0112
H41.06362.27473.63834.15354.1535
H53.12311.99201.01124.15351.6623
H63.12311.99201.01124.15351.6623

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 176.603 C2 C1 H4 179.799
C2 N3 H5 113.081 C2 N3 H6 113.081
H5 N3 H6 110.562
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability