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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: QCISD(T)/aug-cc-pVTZ

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)/aug-cc-pVTZ
 hartrees
Energy at 0K-187.742477
Energy at 298.15K 
HF Energy-186.953209
Nuclear repulsion energy101.454042
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)/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/aug-cc-pVTZ
ABC
5.08253 0.11820 0.11818

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.014 0.606 -0.001
C2 -0.014 -0.606 -0.001
N3 -0.014 1.973 -0.059
N4 0.014 -1.973 -0.059
H5 -0.319 2.410 0.799
H6 0.851 2.382 -0.383
H7 0.319 -2.410 0.799
H8 -0.851 -2.382 -0.383

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21251.36812.57942.00131.99993.13523.1342
C21.21252.57941.36813.13523.13422.00131.9999
N31.36812.57943.94551.01031.01054.47834.4460
N42.57941.36813.94554.47834.44601.01031.0105
H52.00133.13521.01034.47831.66374.86204.9641
H61.99993.13421.01054.44601.66374.96415.0587
H73.13522.00134.47831.01034.86204.96411.6637
H83.13421.99994.44601.01054.96415.05871.6637

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 176.459 C1 N3 H5 113.735
C1 N3 H6 113.589 C2 C1 N3 176.459
C2 N4 H7 113.735 C2 N4 H8 113.589
H5 N3 H6 110.832 H7 N4 H8 110.832
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability