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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2=FULL/6-31G**

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=FULL/6-31G**
 hartrees
Energy at 0K-187.494723
Energy at 298.15K-187.498704
HF Energy-186.883960
Nuclear repulsion energy101.441476
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=FULL/6-31G**
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 3721 3477 18.33      
2 A 3615 3377 3.25      
3 A 2411 2253 0.13      
4 A 1693 1582 14.08      
5 A 1232 1151 0.03      
6 A 829 774 12.46      
7 A 683 638 116.03      
8 A 378 353 0.06      
9 A 329 307 40.63      
10 A 209 196 11.73      
11 B 3721 3477 17.24      
12 B 3617 3380 11.73      
13 B 1692 1581 28.65      
14 B 1379 1288 76.02      
15 B 1231 1150 0.14      
16 B 735 687 386.81      
17 B 358 335 16.44      
18 B 205 192 13.59      

Unscaled Zero Point Vibrational Energy (zpe) 14018.1 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 13098.5 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=FULL/6-31G**
ABC
5.07464 0.11816 0.11811

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.609 0.042
C2 -0.006 -0.609 0.042
N3 -0.006 1.966 -0.080
N4 0.006 -1.966 -0.080
H5 -0.321 2.455 0.743
H6 0.853 2.360 -0.432
H7 0.321 -2.455 0.743
H8 -0.853 -2.360 -0.432

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21861.36262.57852.00122.00143.15903.1269
C21.21862.57851.36263.15903.12692.00122.0014
N31.36262.57853.93271.00791.00814.50904.4223
N42.57851.36263.93274.50904.42231.00791.0081
H52.00123.15901.00794.50901.66364.95114.9843
H62.00143.12691.00814.42231.66364.98435.0185
H73.15902.00124.50901.00794.95114.98431.6636
H83.12692.00144.42231.00814.98435.01851.6636

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.753 C1 N3 H5 114.343
C1 N3 H6 114.353 C2 C1 N3 174.753
C2 N4 H7 114.343 C2 N4 H8 114.353
H5 N3 H6 111.219 H7 N4 H8 111.219
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability