return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCD/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 CCD/TZVP
 hartrees
Energy at 0K-113.743041
Energy at 298.15K 
HF Energy-113.388068
Nuclear repulsion energy37.046907
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 CCD/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 1277 1211 0.00      
2 Σu 2218 2103 1000.54      
3 Πu 195i 185i 6.43      
3 Πu 195i 185i 6.43      

Unscaled Zero Point Vibrational Energy (zpe) 1552.4 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 1471.6 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 CCD/TZVP
B
0.42501

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/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 1.286
C3 0.000 0.000 -1.286

Atom - Atom Distances (Å)
  C1 C2 C3
C11.28561.2856
C21.28562.5711
C31.28562.5711

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 CCD/TZVP
 hartrees
Energy at 0K-113.743281
Energy at 298.15K 
HF Energy-113.387678
Nuclear repulsion energy37.120297
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 CCD/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 1302 1234 1.23      
2 A1 151 143 5.77      
3 B2 2203 2088 955.01      

Unscaled Zero Point Vibrational Energy (zpe) 1827.9 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 1732.8 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 CCD/TZVP
ABC
59.91281 0.43409 0.43097

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.125
C2 0.000 1.272 -0.063
C3 0.000 -1.272 -0.063

Atom - Atom Distances (Å)
  C1 C2 C3
C11.28581.2858
C21.28582.5441
C31.28582.5441

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 163.226
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability