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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/Def2TZVPP
 hartrees
Energy at 0K-187.680286
Energy at 298.15K-187.684317
HF Energy-186.957914
Nuclear repulsion energy101.763291
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 MP2/Def2TZVPP
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 3672 3494 33.71      
2 A 3574 3400 2.81      
3 A 2366 2252 0.30      
4 A 1654 1574 11.22      
5 A 1213 1154 0.14      
6 A 818 778 8.13      
7 A 640 609 106.97      
8 A 398 379 3.38      
9 A 337 321 28.82      
10 A 212 201 17.83      
11 B 3672 3494 32.25      
12 B 3576 3402 22.70      
13 B 1654 1573 28.59      
14 B 1365 1298 105.67      
15 B 1213 1154 0.12      
16 B 689 655 311.05      
17 B 401 381 14.94      
18 B 213 202 21.35      

Unscaled Zero Point Vibrational Energy (zpe) 13832.6 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 13161.7 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 MP2/Def2TZVPP
ABC
5.12085 0.11893 0.11890

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.606 0.059
C2 -0.002 -0.606 0.059
N3 -0.002 1.957 -0.089
N4 0.002 -1.957 -0.089
H5 -0.322 2.463 0.720
H6 0.856 2.340 -0.449
H7 0.322 -2.463 0.720
H8 -0.856 -2.340 -0.449

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21281.35852.56761.99751.99813.15613.1107
C21.21282.56761.35853.15613.11071.99751.9981
N31.35852.56763.91381.00651.00674.50504.3958
N42.56761.35853.91384.50504.39581.00651.0067
H51.99753.15611.00654.50501.66444.96804.9720
H61.99813.11071.00674.39581.66444.97204.9837
H73.15611.99754.50501.00654.96804.97201.6644
H83.11071.99814.39581.00674.97204.98371.6644

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.754 C1 N3 H5 114.436
C1 N3 H6 114.475 C2 C1 N3 173.754
C2 N4 H7 114.436 C2 N4 H8 114.475
H5 N3 H6 111.532 H7 N4 H8 111.532
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability