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All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: CCSD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD/6-311G*
 hartrees
Energy at 0K-132.325242
Energy at 298.15K-132.327337
HF Energy-131.875661
Nuclear repulsion energy59.144115
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/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3576 3410 10.42      
2 A' 3479 3317 65.24      
3 A' 2242 2138 70.73      
4 A' 1728 1647 37.88      
5 A' 1067 1018 8.12      
6 A' 762 727 258.66      
7 A' 495 472 80.17      
8 A' 361 345 18.87      
9 A" 3664 3494 17.55      
10 A" 1262 1203 0.05      
11 A" 641 611 39.78      
12 A" 343 327 4.49      

Unscaled Zero Point Vibrational Energy (zpe) 9810.1 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 9354.0 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 CCSD/6-311G*
ABC
10.02676 0.30813 0.30203

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 1.373 0.000
C2 0.000 0.163 0.000
N3 0.089 -1.202 0.000
H4 -0.033 2.438 0.000
H5 -0.308 -1.618 0.831
H6 -0.308 -1.618 -0.831

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.21002.57631.06563.11973.1197
C21.21001.36782.27521.98911.9891
N32.57631.36783.64191.01071.0107
H41.06562.27523.64194.14904.1490
H53.11971.98911.01074.14901.6628
H63.11971.98911.01074.14901.6628

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 176.061 C2 C1 H4 177.764
C2 N3 H5 112.644 C2 N3 H6 112.644
H5 N3 H6 110.693
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability