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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: QCISD(T)/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 QCISD(T)/6-31G*
 hartrees
Energy at 0K-187.485915
Energy at 298.15K-187.489751
HF Energy-186.866153
Nuclear repulsion energy100.851420
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)/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 3588 3442        
2 A 3496 3354        
3 A 2364 2268        
4 A 1701 1632        
5 A 1237 1186        
6 A 822 788        
7 A 706 677        
8 A 383 367        
9 A 321 308        
10 A 192 185        
11 B 3588 3442        
12 B 3499 3357        
13 B 1702 1633        
14 B 1344 1289        
15 B 1233 1183        
16 B 768 737        
17 B 320 307        
18 B 152 146        

Unscaled Zero Point Vibrational Energy (zpe) 13707.7 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 13149.8 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)/6-31G*
ABC
4.92108 0.11707 0.11698

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.076 0.605 -0.021
C2 -0.076 -0.605 -0.021
N3 0.076 1.983 -0.051
N4 -0.076 -1.983 -0.051
H5 -0.180 2.397 0.843
H6 0.966 2.367 -0.363
H7 0.180 -2.397 0.843
H8 -0.966 -2.367 -0.363

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22021.37752.59262.00572.00333.12633.1682
C21.22022.59261.37753.12633.16822.00572.0033
N31.37752.59263.96811.01841.01854.47164.4835
N42.59261.37753.96814.47164.48351.01841.0185
H52.00573.12631.01844.47161.66424.80844.9772
H62.00333.16821.01854.48351.66424.97725.1130
H73.12632.00574.47161.01844.80844.97721.6642
H83.16822.00334.48351.01854.97725.11301.6642

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 172.772 C1 N3 H5 112.815
C1 N3 H6 112.598 C2 C1 N3 172.772
C2 N4 H7 112.815 C2 N4 H8 112.598
H5 N3 H6 109.570 H7 N4 H8 109.570
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability