return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCNH2 (Ethynamine)

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 CS 1A'
Energy calculated at MP2=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-132.318512
Energy at 298.15K-132.320443
HF Energy-131.867329
Nuclear repulsion energy58.671630
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 A' 3548 3438 17.84      
2 A' 3506 3398 84.90      
3 A' 2184 2116 102.54      
4 A' 1626 1576 23.76      
5 A' 1062 1029 13.00      
6 A' 671 650 177.73      
7 A' 481 466 91.19      
8 A' 317 307 9.48      
9 A" 3653 3541 40.63      
10 A" 1201 1164 0.85      
11 A" 584 566 47.33      
12 A" 309 300 2.67      

Unscaled Zero Point Vibrational Energy (zpe) 9570.5 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 9275.7 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
9.98573 0.30306 0.29708

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.006 1.388 0.000
C2 0.000 0.157 0.000
N3 0.093 -1.208 0.000
H4 -0.020 2.459 0.000
H5 -0.300 -1.635 0.835
H6 -0.300 -1.635 -0.835

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.23132.59831.07153.15003.1500
C21.23131.36832.30271.99931.9993
N32.59831.36833.66951.01641.0164
H41.07152.30273.66954.18804.1880
H53.15001.99931.01644.18801.6691
H63.15001.99931.01644.18801.6691

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 176.351 C2 C1 H4 179.475
C2 N3 H5 113.112 C2 N3 H6 113.112
H5 N3 H6 110.399
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability