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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-115.431940
Energy at 298.15K-115.435151
HF Energy-115.159752
Nuclear repulsion energy62.870096
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 MP2/3-21G
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 3367 3214 0.15 118.13 0.12 0.22
2 A1 3163 3019 28.25 93.41 0.15 0.26
3 A1 1661 1585 13.21 10.13 0.46 0.63
4 A1 1582 1510 0.00 15.68 0.23 0.38
5 A1 1132 1081 1.11 5.10 0.15 0.26
6 A1 936 894 2.10 12.47 0.47 0.64
7 A2 1057 1009 0.00 19.26 0.75 0.86
8 A2 862 823 0.00 0.01 0.75 0.86
9 B1 3250 3102 34.27 64.37 0.75 0.86
10 B1 1139 1087 2.06 4.10 0.75 0.86
11 B1 621 592 96.60 1.45 0.75 0.86
12 B2 3319 3168 0.00 61.19 0.75 0.86
13 B2 1140 1088 0.23 0.00 0.75 0.86
14 B2 1108 1058 69.15 1.10 0.75 0.86
15 B2 703 671 6.59 16.51 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12519.9 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 11950.2 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 MP2/3-21G
ABC
0.98897 0.69811 0.44602

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.891
C2 0.000 0.656 -0.513
C3 0.000 -0.656 -0.513
H4 0.000 1.576 -1.064
H5 0.000 -1.576 -1.064
H6 0.918 0.000 1.469
H7 -0.918 0.000 1.469

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.54951.54952.51112.51111.08481.0848
C21.54951.31271.07232.29962.28052.2805
C31.54951.31272.29961.07232.28052.2805
H42.51111.07232.29963.15253.12123.1212
H52.51112.29961.07233.15253.12123.1212
H61.08482.28052.28053.12123.12121.8361
H71.08482.28052.28053.12123.12121.8361

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.939 C1 C2 H4 145.986
C1 C3 C2 64.939 C1 C3 H5 145.986
C2 C1 C3 50.121 C2 C1 H6 118.857
C2 C1 H7 118.857 C2 C3 H5 149.075
C3 C1 H6 118.857 C3 C1 H7 118.857
C3 C2 H4 149.075 H6 C1 H7 115.613
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability