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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP4=FULL/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at MP4=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-116.501159
Energy at 298.15K 
HF Energy-115.908513
Nuclear repulsion energy58.682620
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 MP4=FULL/aug-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 3464 3357        
2 A1 3054 2961        
3 A1 2143 2077        
4 A1 1410 1367        
5 A1 943 914        
6 E 3120 3024        
6 E 3120 3024        
7 E 1501 1455        
7 E 1501 1455        
8 E 1064 1032        
8 E 1064 1031        
9 E 636 617        
9 E 636 617        
10 E 321 311        
10 E 320 311        

Unscaled Zero Point Vibrational Energy (zpe) 12147.9 cm-1
Scaled (by 0.9693) Zero Point Vibrational Energy (zpe) 11775.0 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 MP4=FULL/aug-cc-pVTZ
ABC
5.36488 0.28498 0.28498

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/aug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.242
C2 0.000 0.000 0.215
C3 0.000 0.000 1.427
H4 0.000 0.000 2.485
H5 0.000 1.019 -1.627
H6 0.883 -0.510 -1.627
H7 -0.883 -0.510 -1.627

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45732.66903.72721.08951.08951.0895
C21.45731.21172.27002.10492.10492.1049
C32.66901.21171.05823.21903.21903.2190
H43.72722.27001.05824.23604.23604.2360
H51.08952.10493.21904.23601.76571.7657
H61.08952.10493.21904.23601.76571.7657
H71.08952.10493.21904.23601.76571.7657

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 110.655
C2 C1 H6 110.655 C2 C1 H7 110.655
C2 C3 H4 180.000 H5 C1 H6 108.262
H5 C1 H7 108.262 H6 C1 H7 108.262
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability