return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: BLYP/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 BLYP/6-31+G**
 hartrees
Energy at 0K-187.991122
Energy at 298.15K-187.994645
HF Energy-187.991122
Nuclear repulsion energy100.927709
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 BLYP/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 3505 3486 21.99      
2 A 3421 3403 0.46      
3 A 2274 2262 0.23      
4 A 1610 1602 8.58      
5 A 1148 1142 0.30      
6 A 804 800 1.57      
7 A 466 463 177.21      
8 A 434 432 1.31      
9 A 362 360 10.33      
10 A 120 119 24.36      
11 B 3504 3485 20.76      
12 B 3425 3407 1.10      
13 B 1612 1603 21.25      
14 B 1340 1333 133.84      
15 B 1147 1141 0.30      
16 B 520 517 304.68      
17 B 362 360 13.64      
18 B 123 123 25.54      

Unscaled Zero Point Vibrational Energy (zpe) 13088.8 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 13019.4 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 BLYP/6-31+G**
ABC
5.20941 0.11699 0.11698

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 0.613 0.022
C2 -0.008 -0.613 0.022
N3 -0.008 1.980 -0.062
N4 0.008 -1.980 -0.062
H5 -0.360 2.480 0.755
H6 0.830 2.419 -0.448
H7 0.360 -2.480 0.755
H8 -0.830 -2.419 -0.448

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22661.36962.59482.03892.03883.19843.1804
C21.22662.59481.36963.19843.18042.03892.0388
N31.36962.59483.96041.02071.02104.54924.4917
N42.59481.36963.96044.54924.49171.02071.0210
H52.03893.19841.02074.54921.69295.01185.0661
H62.03883.18041.02104.49171.69295.06615.1144
H73.19842.03894.54921.02075.01185.06611.6929
H83.18042.03884.49171.02105.06615.11441.6929

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 176.240 C1 N3 H5 116.320
C1 N3 H6 116.288 C2 C1 N3 176.240
C2 N4 H7 116.320 C2 N4 H8 116.288
H5 N3 H6 112.034 H7 N4 H8 112.034
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.177      
2 C 0.177      
3 N -0.765      
4 N -0.765      
5 H 0.293      
6 H 0.296      
7 H 0.293      
8 H 0.296      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.358 1.358
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.439 4.089 0.000
y 4.089 -14.127 0.000
z 0.000 0.000 -24.677
Traceless
 xyz
x -5.037 4.089 0.000
y 4.089 10.431 0.000
z 0.000 0.000 -5.394
Polar
3z2-r2-10.788
x2-y2-10.312
xy4.089
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.124 0.343 0.000
y 0.343 10.659 0.000
z 0.000 0.000 4.094


<r2> (average value of r2) Å2
<r2> 99.518
(<r2>)1/2 9.976