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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: mPW1PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at mPW1PW91/cc-pVDZ
 hartrees
Energy at 0K-188.001304
Energy at 298.15K-188.005359
HF Energy-188.001304
Nuclear repulsion energy101.842255
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 mPW1PW91/cc-pVDZ
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 3625 3474 18.86      
2 A 3537 3390 3.54      
3 A 2405 2304 0.24      
4 A 1635 1567 8.54      
5 A 1206 1155 0.02      
6 A 842 807 1.89      
7 A 593 568 118.16      
8 A 413 396 4.70      
9 A 405 388 23.76      
10 A 197 188 22.50      
11 B 3624 3473 18.01      
12 B 3540 3393 5.64      
13 B 1637 1568 20.10      
14 B 1405 1346 107.67      
15 B 1206 1156 0.03      
16 B 658 630 314.66      
17 B 415 397 19.50      
18 B 197 189 23.70      

Unscaled Zero Point Vibrational Energy (zpe) 13769.1 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 13195.0 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 mPW1PW91/cc-pVDZ
ABC
5.09584 0.11940 0.11939

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.004 0.609 0.043
C2 -0.004 -0.609 0.043
N3 -0.004 1.956 -0.081
N4 0.004 -1.956 -0.081
H5 -0.326 2.455 0.742
H6 0.859 2.353 -0.438
H7 0.326 -2.455 0.742
H8 -0.859 -2.353 -0.438

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21791.35312.56832.00092.00123.15863.1226
C21.21792.56831.35313.15863.12262.00092.0012
N31.35312.56833.91271.01451.01474.49914.4080
N42.56831.35313.91274.49914.40801.01451.0147
H52.00093.15861.01454.49911.67534.95234.9790
H62.00123.12261.01474.40801.67534.97905.0102
H73.15862.00094.49911.01454.95234.97901.6753
H83.12262.00124.40801.01474.97905.01021.6753

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.688 C1 N3 H5 114.616
C1 N3 H6 114.621 C2 C1 N3 174.688
C2 N4 H7 114.616 C2 N4 H8 114.621
H5 N3 H6 111.299 H7 N4 H8 111.299
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.017      
2 C -0.017      
3 N -0.211      
4 N -0.211      
5 H 0.113      
6 H 0.115      
7 H 0.113      
8 H 0.115      


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 1.513 1.513
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.176 4.220 0.000
y 4.220 -13.306 0.000
z 0.000 0.000 -23.341
Traceless
 xyz
x -4.852 4.220 0.000
y 4.220 9.953 0.000
z 0.000 0.000 -5.101
Polar
3z2-r2-10.201
x2-y2-9.870
xy4.220
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.947 0.306 0.000
y 0.306 9.144 0.000
z 0.000 0.000 2.939


<r2> (average value of r2) Å2
<r2> 96.874
(<r2>)1/2 9.842