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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: QCISD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-116.398374
Energy at 298.15K-116.401564
HF Energy-115.864417
Nuclear repulsion energy63.650449
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)/cc-pVTZ
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 3310 3139        
2 A1 3071 2913        
3 A1 1681 1595        
4 A1 1523 1445        
5 A1 1158 1098        
6 A1 927 880        
7 A2 1021 968        
8 A2 825 782        
9 B1 3142 2981        
10 B1 1108 1051        
11 B1 576 547        
12 B2 3263 3096        
13 B2 1074 1019        
14 B2 1041 988        
15 B2 791 750        

Unscaled Zero Point Vibrational Energy (zpe) 12255.6 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 11625.6 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 QCISD(T)/cc-pVTZ
ABC
0.99859 0.72825 0.45978

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.865
C2 0.000 0.651 -0.502
C3 0.000 -0.651 -0.502
H4 0.000 1.581 -1.040
H5 0.000 -1.581 -1.040
H6 0.914 0.000 1.455
H7 -0.914 0.000 1.455

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.51411.51412.47632.47631.08771.0877
C21.51411.30121.07522.29592.25592.2559
C31.51411.30122.29591.07522.25592.2559
H42.47631.07522.29593.16263.09253.0925
H52.47632.29591.07523.16263.09253.0925
H61.08772.25592.25593.09253.09251.8273
H71.08772.25592.25593.09253.09251.8273

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.553 C1 C2 H4 145.493
C1 C3 C2 64.553 C1 C3 H5 145.493
C2 C1 C3 50.894 C2 C1 H6 119.334
C2 C1 H7 119.334 C2 C3 H5 149.954
C3 C1 H6 119.334 C3 C1 H7 119.334
C3 C2 H4 149.954 H6 C1 H7 114.288
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability