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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCD/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCD/TZVP
 hartrees
Energy at 0K-187.581543
Energy at 298.15K-187.585535
HF Energy-186.944726
Nuclear repulsion energy101.826389
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 CCD/TZVP
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 3683 3491 20.23      
2 A 3591 3404 2.73      
3 A 2435 2309 0.09      
4 A 1684 1597 15.67      
5 A 1236 1171 0.14      
6 A 827 784 15.11      
7 A 690 655 112.27      
8 A 392 371 0.47      
9 A 336 319 36.08      
10 A 198 187 15.30      
11 B 3683 3491 18.70      
12 B 3592 3405 12.50      
13 B 1684 1596 37.40      
14 B 1352 1281 89.52      
15 B 1234 1170 0.43      
16 B 748 709 340.72      
17 B 365 346 16.75      
18 B 186 177 16.75      

Unscaled Zero Point Vibrational Energy (zpe) 13957.6 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 13231.8 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 CCD/TZVP
ABC
5.08749 0.11921 0.11916

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.601 0.053
C2 -0.006 -0.601 0.053
N3 -0.006 1.957 -0.086
N4 0.006 -1.957 -0.086
H5 -0.330 2.455 0.728
H6 0.852 2.345 -0.445
H7 0.330 -2.455 0.728
H8 -0.852 -2.345 -0.445

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20291.36222.56172.00082.00073.14663.1085
C21.20292.56171.36223.14663.10852.00082.0007
N31.36222.56173.91311.00731.00744.49824.3985
N42.56171.36223.91314.49824.39851.00731.0074
H52.00083.14661.00734.49821.66834.95374.9681
H62.00073.10851.00744.39851.66834.96814.9894
H73.14662.00084.49821.00734.95374.96811.6683
H83.10852.00074.39851.00744.96814.98941.6683

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.094 C1 N3 H5 114.381
C1 N3 H6 114.363 C2 C1 N3 174.094
C2 N4 H7 114.381 C2 N4 H8 114.363
H5 N3 H6 111.803 H7 N4 H8 111.803
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability