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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: QCISD(T)=FULL/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)=FULL/cc-pVTZ
 hartrees
Energy at 0K-187.788591
Energy at 298.15K-187.792697
HF Energy-186.950873
Nuclear repulsion energy101.920726
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/cc-pVTZ
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 3650 3493 0.00      
2 A 3564 3410 0.00      
3 A 2384 2281 0.00      
4 A 1672 1600 0.00      
5 A 1220 1167 0.00      
6 A 819 784 0.00      
7 A 634 607 0.00      
8 A 422 404 0.00      
9 A 355 340 0.00      
10 A 213 204 0.00      
11 B 3650 3493 0.00      
12 B 3566 3412 0.00      
13 B 1669 1597 0.00      
14 B 1359 1300 0.00      
15 B 1220 1167 0.00      
16 B 688 658 0.00      
17 B 421 403 0.00      
18 B 214 205 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13859.1 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 13261.8 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 QCISD(T)=FULL/cc-pVTZ
ABC
5.12429 0.11934 0.11932

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.013 0.604 -0.001
C2 -0.013 -0.604 -0.001
N3 -0.013 1.963 -0.058
N4 0.013 -1.963 -0.058
H5 -0.316 2.401 0.796
H6 0.848 2.372 -0.384
H7 0.316 -2.401 0.796
H8 -0.848 -2.372 -0.384

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20751.36072.56701.99361.99213.12323.1209
C21.20752.56701.36073.12323.12091.99361.9921
N31.36072.56703.92561.00711.00734.45894.4259
N42.56701.36073.92564.45894.42591.00711.0073
H51.99363.12321.00714.45891.65794.84344.9449
H61.99213.12091.00734.42591.65794.94495.0372
H73.12321.99364.45891.00714.84344.94491.6579
H83.12091.99214.42591.00734.94495.03721.6579

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 176.581 C1 N3 H5 113.866
C1 N3 H6 113.717 C2 C1 N3 176.581
C2 N4 H7 113.866 C2 N4 H8 113.717
H5 N3 H6 110.774 H7 N4 H8 110.774
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability