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All results from a given calculation for HCCCN (Cyanoacetylene)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at CCSD=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-169.321834
Energy at 298.15K-169.321171
HF Energy-168.607513
Nuclear repulsion energy77.189477
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 CCSD=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 Σ 3472 3302 71.21      
2 Σ 2424 2306 16.76      
3 Σ 2185 2078 2.16      
4 Σ 897 853 0.13      
5 Π 713 678 35.97      
5 Π 713 678 35.97      
6 Π 567 539 6.87      
6 Π 567 539 6.87      
7 Π 244 232 0.23      
7 Π 244 232 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 6013.2 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 5718.6 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 CCSD=FULL/aug-cc-pVTZ
B
0.15273

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.894
C2 0.000 0.000 0.744
C3 0.000 0.000 -0.636
C4 0.000 0.000 -1.835
H5 0.000 0.000 -2.893

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.14992.52913.72844.7867
C21.14991.37922.57843.6368
C32.52911.37921.19922.2576
C43.72842.57841.19921.0584
H54.78673.63682.25761.0584

picture of Cyanoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 180.000 C2 C3 C4 180.000
C3 C4 H5 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability