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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-187.944984
Energy at 298.15K-187.949033
HF Energy-187.944984
Nuclear repulsion energy102.080269
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 B1B95/6-31G**
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 3647 3482 15.78      
2 A 3557 3397 3.02      
3 A 2409 2301 0.26      
4 A 1688 1612 11.10      
5 A 1214 1159 0.32      
6 A 847 809 1.93      
7 A 567 541 167.76      
8 A 426 406 14.35      
9 A 420 401 14.77      
10 A 201 192 20.63      
11 B 3647 3482 15.05      
12 B 3561 3400 5.51      
13 B 1690 1614 29.15      
14 B 1412 1348 105.52      
15 B 1214 1159 0.37      
16 B 624 596 381.22      
17 B 419 400 20.54      
18 B 201 192 21.53      

Unscaled Zero Point Vibrational Energy (zpe) 13871.6 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 13244.6 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 B1B95/6-31G**
ABC
5.21426 0.11981 0.11979

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.606 0.038
C2 -0.005 -0.606 0.038
N3 -0.005 1.955 -0.075
N4 0.005 -1.955 -0.075
H5 -0.336 2.452 0.739
H6 0.846 2.361 -0.440
H7 0.336 -2.452 0.739
H8 -0.846 -2.361 -0.440

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21201.35352.56322.00432.00423.15533.1234
C21.21202.56321.35353.15533.12342.00432.0042
N31.35352.56323.90941.01071.01094.49474.4121
N42.56321.35353.90944.49474.41211.01071.0109
H52.00433.15531.01074.49471.67254.95074.9819
H62.00423.12341.01094.41211.67254.98195.0163
H73.15532.00434.49471.01074.95074.98191.6725
H83.12342.00424.41211.01094.98195.01631.6725

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.131 C1 N3 H5 115.183
C1 N3 H6 115.152 C2 C1 N3 175.131
C2 N4 H7 115.183 C2 N4 H8 115.152
H5 N3 H6 111.652 H7 N4 H8 111.652
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.169      
2 C 0.169      
3 N -0.859      
4 N -0.859      
5 H 0.344      
6 H 0.346      
7 H 0.344      
8 H 0.346      


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 1.618 1.618
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.997 4.415 0.000
y 4.415 -13.234 0.000
z 0.000 0.000 -23.116
Traceless
 xyz
x -4.821 4.415 0.000
y 4.415 9.822 0.000
z 0.000 0.000 -5.000
Polar
3z2-r2-10.001
x2-y2-9.762
xy4.415
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.661 0.249 0.000
y 0.249 8.874 0.000
z 0.000 0.000 2.657


<r2> (average value of r2) Å2
<r2> 96.562
(<r2>)1/2 9.827