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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: QCISD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-116.264845
Energy at 298.15K-116.268041
HF Energy-115.830759
Nuclear repulsion energy63.099341
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/cc-pVDZ
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 3326 3191 0.11      
2 A1 3086 2961 55.45      
3 A1 1711 1641 14.77      
4 A1 1519 1457 2.42      
5 A1 1183 1135 0.29      
6 A1 927 889 3.12      
7 A2 1016 975 0.00      
8 A2 825 792 0.00      
9 B1 3160 3032 46.66      
10 B1 1103 1058 1.99      
11 B1 586 562 67.80      
12 B2 3281 3148 0.28      
13 B2 1078 1035 33.17      
14 B2 1043 1001 17.71      
15 B2 799 766 14.08      

Unscaled Zero Point Vibrational Energy (zpe) 12320.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 11820.4 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/cc-pVDZ
ABC
0.97854 0.71853 0.45256

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.869
C2 0.000 0.657 -0.504
C3 0.000 -0.657 -0.504
H4 0.000 1.599 -1.052
H5 0.000 -1.599 -1.052
H6 0.924 0.000 1.471
H7 -0.924 0.000 1.471

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.52251.52252.49902.49901.10231.1023
C21.52251.31381.08922.32102.27722.2772
C31.52251.31382.32101.08922.27722.2772
H42.49901.08922.32103.19713.12593.1259
H52.49902.32101.08923.19713.12593.1259
H61.10232.27722.27723.12593.12591.8473
H71.10232.27722.27723.12593.12591.8473

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.439 C1 C2 H4 145.733
C1 C3 C2 64.439 C1 C3 H5 145.733
C2 C1 C3 51.123 C2 C1 H6 119.497
C2 C1 H7 119.497 C2 C3 H5 149.829
C3 C1 H6 119.497 C3 C1 H7 119.497
C3 C2 H4 149.829 H6 C1 H7 113.842
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability