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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP2=FULL/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at MP2=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-116.297390
Energy at 298.15K 
HF Energy-115.874963
Nuclear repulsion energy57.976386
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=FULL/aug-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 3497 3389 53.80 40.31 0.21 0.34
2 A1 3077 2982 16.57 227.36 0.01 0.02
3 A1 2128 2062 3.39 108.36 0.15 0.25
4 A1 1396 1353 0.34 6.73 0.47 0.64
5 A1 949 919 0.82 7.09 0.04 0.08
6 E 3170 3072 5.28 66.21 0.75 0.86
6 E 3170 3072 5.28 66.21 0.75 0.86
7 E 1472 1427 7.91 5.59 0.75 0.86
7 E 1472 1427 7.91 5.59 0.75 0.86
8 E 1044 1012 0.01 0.16 0.75 0.86
8 E 1044 1012 0.01 0.16 0.75 0.86
9 E 565 547 51.99 1.70 0.75 0.86
9 E 565 547 51.99 1.70 0.75 0.86
10 E 266 258 3.33 4.73 0.75 0.86
10 E 266 258 3.33 4.73 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12040.7 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 11669.8 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 MP2=FULL/aug-cc-pVDZ
ABC
5.26100 0.27817 0.27817

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.257
C2 0.000 0.000 0.213
C3 0.000 0.000 1.446
H4 0.000 0.000 2.518
H5 0.000 1.029 -1.643
H6 0.892 -0.515 -1.643
H7 -0.892 -0.515 -1.643

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.47012.70273.77551.09951.09951.0995
C21.47011.23272.30542.12272.12272.1227
C32.70271.23271.07273.25603.25603.2560
H43.77552.30541.07274.28724.28724.2872
H51.09952.12273.25604.28721.78311.7831
H61.09952.12273.25604.28721.78311.7831
H71.09952.12273.25604.28721.78311.7831

picture of propyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 180.000 C2 C1 H5 110.567
C2 C1 H6 110.567 C2 C1 H7 110.567
C2 C3 H4 180.000 H5 C1 H6 108.353
H5 C1 H7 108.353 H6 C1 H7 108.353
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability