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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: QCISD(T)=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD(T)=FULL/6-31G*
 hartrees
Energy at 0K-187.502695
Energy at 298.15K-187.506540
HF Energy-186.866947
Nuclear repulsion energy100.970077
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 QCISD(T)=FULL/6-31G*
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 3590 3590 0.00      
2 A 3499 3499 0.00      
3 A 2376 2376 0.00      
4 A 1703 1703 0.00      
5 A 1236 1236 0.00      
6 A 821 821 0.00      
7 A 697 697 0.00      
8 A 363 363 0.00      
9 A 325 325 0.00      
10 A 185 185 0.00      
11 B 3590 3590 0.00      
12 B 3502 3502 0.00      
13 B 1703 1703 0.00      
14 B 1348 1348 0.00      
15 B 1234 1234 0.00      
16 B 759 759 0.00      
17 B 332 332 0.00      
18 B 170 170 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13717.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13717.0 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 QCISD(T)=FULL/6-31G*
ABC
4.96428 0.11727 0.11721

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.052 0.607 -0.013
C2 -0.052 -0.607 -0.013
N3 0.052 1.981 -0.055
N4 -0.052 -1.981 -0.055
H5 -0.214 2.407 0.831
H6 0.941 2.367 -0.369
H7 0.214 -2.407 0.831
H8 -0.941 -2.367 -0.369

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21821.37492.59052.00542.00333.13383.1549
C21.21822.59051.37493.13383.15492.00542.0033
N31.37492.59053.96371.01811.01824.47954.4706
N42.59051.37493.96374.47954.47061.01811.0182
H52.00543.13381.01814.47951.66504.83274.9753
H62.00333.15491.01824.47061.66504.97535.0934
H73.13382.00544.47951.01814.83274.97531.6650
H83.15492.00334.47061.01824.97535.09341.6650

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.814 C1 N3 H5 113.024
C1 N3 H6 112.826 C2 C1 N3 174.814
C2 N4 H7 113.024 C2 N4 H8 112.826
H5 N3 H6 109.704 H7 N4 H8 109.704
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability