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All results from a given calculation for Na2S (Sodium sulfide)

using model chemistry: QCISD(T)/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no D*H 1ΣG
1 2 yes C2V 1A1

Conformer 1 (D*H)

Jump to S1C2
Energy calculated at QCISD(T)/Def2TZVPP
 hartrees
Energy at 0K-721.519015
Energy at 298.15K 
HF Energy-721.298757
Nuclear repulsion energy89.997494
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)/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 281 281        
2 Σu 425 425        
3 Πu 37i 37i        
3 Πu 37i 37i        

Unscaled Zero Point Vibrational Energy (zpe) 315.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 315.7 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)/Def2TZVPP
B
0.06233

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/Def2TZVPP

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.000
Na2 0.000 0.000 2.425
Na3 0.000 0.000 -2.425

Atom - Atom Distances (Å)
  S1 Na2 Na3
S12.42532.4253
Na22.42534.8507
Na32.42534.8507

picture of Sodium sulfide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Na2 S1 Na3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at QCISD(T)/Def2TZVPP
 hartrees
Energy at 0K-721.520797
Energy at 298.15K 
HF Energy-721.297875
Nuclear repulsion energy91.059821
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)/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 308 308        
2 A1 57 57        
3 B2 387 387        

Unscaled Zero Point Vibrational Energy (zpe) 376.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 376.0 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)/Def2TZVPP
ABC
0.60021 0.08115 0.07148

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.707
Na2 0.000 2.126 -0.514
Na3 0.000 -2.126 -0.514

Atom - Atom Distances (Å)
  S1 Na2 Na3
S12.45102.4510
Na22.45104.2512
Na32.45104.2512

picture of Sodium sulfide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Na2 S1 Na3 120.277
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability