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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP3/6-31+G**
 hartrees
Energy at 0K-187.510752
Energy at 298.15K-187.514735
HF Energy-186.893628
Nuclear repulsion energy101.469942
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 MP3/6-31+G**
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 3752 3491 30.44      
2 A 3653 3399 1.94      
3 A 2441 2271 0.01      
4 A 1712 1593 15.16      
5 A 1243 1156 0.11      
6 A 835 777 8.44      
7 A 672 625 131.25      
8 A 425 395 1.43      
9 A 347 323 34.46      
10 A 208 194 16.99      
11 B 3752 3491 27.22      
12 B 3655 3401 18.91      
13 B 1713 1594 42.65      
14 B 1367 1272 103.22      
15 B 1239 1153 0.89      
16 B 719 669 344.10      
17 B 347 323 18.66      
18 B 174 162 16.11      

Unscaled Zero Point Vibrational Energy (zpe) 14126.0 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 13144.2 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 MP3/6-31+G**
ABC
5.10516 0.11824 0.11817

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.009 0.606 0.039
C2 -0.009 -0.606 0.039
N3 -0.009 1.969 -0.076
N4 0.009 -1.969 -0.076
H5 -0.342 2.459 0.739
H6 0.837 2.376 -0.441
H7 0.342 -2.459 0.739
H8 -0.837 -2.376 -0.441

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21131.36852.57742.01252.01263.16153.1364
C21.21132.57741.36853.16153.13642.01252.0126
N31.36852.57743.93851.00751.00764.51654.4386
N42.57741.36853.93854.51654.43861.00751.0076
H52.01253.16151.00754.51651.67064.96585.0020
H62.01263.13641.00764.43861.67065.00205.0385
H73.16152.01254.51651.00754.96585.00201.6706
H83.13642.01264.43861.00765.00205.03851.6706

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.945 C1 N3 H5 114.933
C1 N3 H6 114.927 C2 C1 N3 174.945
C2 N4 H7 114.933 C2 N4 H8 114.927
H5 N3 H6 112.007 H7 N4 H8 112.007
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability