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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/TZVP
 hartrees
Energy at 0K-187.685957
Energy at 298.15K-187.689861
HF Energy-186.943236
Nuclear repulsion energy101.496448
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(T)=FULL/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 3639 3479        
2 A 3546 3390        
3 A 2361 2257        
4 A 1665 1592        
5 A 1219 1166        
6 A 814 778        
7 A 686 656        
8 A 386 369        
9 A 338 324        
10 A 183 175        
11 B 3639 3479        
12 B 3548 3392        
13 B 1664 1591        
14 B 1336 1278        
15 B 1218 1164        
16 B 746 713        
17 B 351 336        
18 B 163 156        

Unscaled Zero Point Vibrational Energy (zpe) 13751.6 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 13146.5 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(T)=FULL/TZVP
ABC
5.03794 0.11847 0.11841

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.068 0.602 -0.013
C2 -0.068 -0.602 -0.013
N3 0.068 1.970 -0.052
N4 -0.068 -1.970 -0.052
H5 -0.215 2.398 0.820
H6 0.941 2.360 -0.379
H7 0.215 -2.398 0.820
H8 -0.941 -2.360 -0.379

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21091.36882.57541.99961.99713.11623.1500
C21.21092.57541.36883.11623.15001.99961.9971
N31.36882.57543.94211.01101.01104.45624.4577
N42.57541.36883.94214.45624.45771.01101.0110
H51.99963.11621.01104.45621.66544.81474.9597
H61.99713.15001.01104.45771.66544.95975.0813
H73.11621.99964.45621.01104.81474.95971.6654
H83.15001.99714.45771.01104.95975.08131.6654

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.388 C1 N3 H5 113.476
C1 N3 H6 113.256 C2 C1 N3 173.388
C2 N4 H7 113.476 C2 N4 H8 113.256
H5 N3 H6 110.893 H7 N4 H8 110.893
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability