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All results from a given calculation for HCN (Hydrogen cyanide)

using model chemistry: QCISD(TQ)/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at QCISD(TQ)/6-31+G**
 hartrees
Energy at 0K-93.192095
Energy at 298.15K-93.192139
HF Energy-92.876746
Nuclear repulsion energy23.588691
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(TQ)/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3488 3488        
2 Σ 2120 2120        
3 Π 669 669        
3 Π 669 669        

Unscaled Zero Point Vibrational Energy (zpe) 3472.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3472.9 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(TQ)/6-31+G**
B
1.44416

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.510
H2 0.000 0.000 -1.578
N3 0.000 0.000 0.662

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06831.1717
H21.06832.2400
N31.17172.2400

picture of Hydrogen cyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 N3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability