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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: QCISD/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/aug-cc-pVTZ
 hartrees
Energy at 0K-187.707724
Energy at 298.15K-187.711769
HF Energy-186.954411
Nuclear repulsion energy101.780240
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/aug-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 3660 3522 27.81      
2 A 3571 3437 1.16      
3 A 2385 2296 0.08      
4 A 1678 1615 9.82      
5 A 1228 1181 0.84      
6 A 818 788 7.54      
7 A 637 613 101.10      
8 A 407 392 3.48      
9 A 345 332 26.41      
10 A 205 197 17.44      
11 B 3659 3522 27.01      
12 B 3573 3438 13.94      
13 B 1678 1615 28.25      
14 B 1350 1300 104.41      
15 B 1227 1181 0.81      
16 B 689 663 274.93      
17 B 406 391 16.55      
18 B 204 197 19.64      

Unscaled Zero Point Vibrational Energy (zpe) 13860.5 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 13339.4 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/aug-cc-pVTZ
ABC
5.12482 0.11897 0.11896

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 0.603 0.050
C2 -0.003 -0.603 0.050
N3 -0.003 1.959 -0.083
N4 0.003 -1.959 -0.083
H5 -0.330 2.459 0.727
H6 0.853 2.349 -0.443
H7 0.330 -2.459 0.727
H8 -0.853 -2.349 -0.443

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20631.36232.56552.00312.00343.15283.1131
C21.20632.56551.36233.15283.11312.00312.0034
N31.36232.56553.91771.00671.00694.50364.4058
N42.56551.36233.91774.50364.40581.00671.0069
H52.00313.15281.00674.50361.66704.96154.9757
H62.00343.11311.00694.40581.66704.97574.9984
H73.15282.00314.50361.00674.96154.97571.6670
H83.11312.00344.40581.00694.97574.99841.6670

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.355 C1 N3 H5 114.628
C1 N3 H6 114.644 C2 C1 N3 174.355
C2 N4 H7 114.628 C2 N4 H8 114.644
H5 N3 H6 111.758 H7 N4 H8 111.758
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability