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All results from a given calculation for C3 (carbon trimer)

using model chemistry: CCSD=FULL/TZVP

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 CCSD=FULL/TZVP
 hartrees
Energy at 0K-113.801917
Energy at 298.15K 
HF Energy-113.387883
Nuclear repulsion energy36.986775
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 CCSD=FULL/TZVP
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 1264 1197 0.00      
2 Σu 2190 2075 942.96      
3 Πu 193i 183i 7.79      
3 Πu 193i 183i 7.79      

Unscaled Zero Point Vibrational Energy (zpe) 1534.3 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 1453.7 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 CCSD=FULL/TZVP
B
0.42363

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.000 0.000 1.288
C3 0.000 0.000 -1.288

Atom - Atom Distances (Å)
  C1 C2 C3
C11.28761.2876
C21.28762.5753
C31.28762.5753

picture of carbon trimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C2 C1 C3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CCSD=FULL/TZVP
 hartrees
Energy at 0K-113.802201
Energy at 298.15K 
HF Energy-113.387322
Nuclear repulsion energy37.088204
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 CCSD=FULL/TZVP
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 1297 1229 1.85      
2 A1 132 125 5.91      
3 B2 2168 2054 872.96      

Unscaled Zero Point Vibrational Energy (zpe) 1798.3 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 1703.9 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 CCSD=FULL/TZVP
ABC
41.99193 0.43654 0.43205

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.149
C2 0.000 1.268 -0.075
C3 0.000 -1.268 -0.075

Atom - Atom Distances (Å)
  C1 C2 C3
C11.28811.2881
C21.28812.5369
C31.28812.5369

picture of carbon trimer state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C2 C1 C3 159.970
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability