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Experimental data for NH2BHNH2 (diaminoborane)

22 02 02 11 45
Other names
Borane, diamino-;
INChI INChIKey SMILES IUPAC name
InChI=1S/BH5N2/c2-1-3/h1H,2-3H2 NBN
State Conformation
1A1 C2V
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A1 3551   1982Reu/Tho:4737-4745      
2 A1 3458          
3 A1 2516          
4 A1 1659          
5 A1 1177          
6 A1 933          
7 A1 402          
10 B1 914          
11 B1 586          
12 B1 422          
13 B2 3556          
14 B2 3464          
15 B2 1605          
16 B2 1393          
17 B2 1351          
18 B2 833          

Calculated vibrational frequencies for NH2BHNH2 (diaminoborane).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
1.74733 0.30333 0.25845 1982Tho/Gwi:3822-3827 11B

Calculated rotational constants for NH2BHNH2 (diaminoborane).
Product of moments of inertia moments of inertia
34972amu3Å6   1.60135790897391E-115gm3 cm6
Geometric Data
picture of diaminoborane

Point Group C2v


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rBH 1.193 0.001 1 2 1982Tho/Gwi:3822-3827 r0
rBN 1.418 0.001 1 3 1982Tho/Gwi:3822-3827
rNH 1.005 0.005 3 5 1982Tho/Gwi:3822-3827 cis
rNH 1.000 0.005 3 6 1982Tho/Gwi:3822-3827
aNBN 122 0.3 3 1 4 1982Tho/Gwi:3822-3827
aBNH 121.1 0.1 1 3 5 1982Tho/Gwi:3822-3827
aBNH 123.7 0.6 1 3 6 1982Tho/Gwi:3822-3827

Cartesians
Atom x (Å) y (Å) z (Å)
B1 0.0000 0.0000 0.5072
H2 0.0000 0.0000 1.7002
N3 0.0000 1.2402 -0.1803
N4 0.0000 -1.2402 -0.1803
H5 0.0000 2.1114 0.3207
H6 0.0000 1.3221 -1.1769
H7 0.0000 -2.1114 0.3207
H8 0.0000 -1.3221 -1.1769

Atom - Atom Distances bond lengths
Distances in Å
  B1 H2 N3 N4 H5 H6 H7 H8
B1   1.19301.41801.41802.11972.14112.11972.1411
H2 1.1930   2.25262.25262.52213.16632.52213.1663
N3 1.41802.2526   2.48041.00501.00003.38892.7494
N4 1.41802.25262.4804   3.38892.74941.00501.0000
H5 2.11972.52211.00503.3889   1.69294.22293.7460
H6 2.14113.16631.00002.74941.6929   3.74602.6443
H7 2.11972.52213.38891.00504.22293.7460   1.6929
H8 2.14113.16632.74941.00003.74602.64431.6929  

Calculated geometries for NH2BHNH2 (diaminoborane).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
B1 N3 H5 121.100 B1 N3 H6 123.700
B1 N4 H7 121.100 B1 N4 H8 123.700
H2 B1 N3 119.000 H2 B1 N4 119.000
N3 B1 N4 122.000 H5 N3 H6 115.200
H7 N4 H8 115.200

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
B-H 1
B-N 2
N-H 4

Connectivity
Atom 1 Atom 2
B1 H2
B1 N3
B1 N4
N3 H5
N3 H6
N4 H7
N4 H8
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A1 C2v True 0.000 0.000 1.245 1.245 1982Tho/Gwi:3822-3827 μ0 +-0.017 D C2v 1 2
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for NH2BHNH2 (diaminoborane).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A1 C2v True       C2v 1 2

Calculated electric quadrupole moments for NH2BHNH2 (diaminoborane).

References
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squib reference DOI
1982Reu/Tho:4737-4745 DC Reuter, LR Thorne, WD Gwinn "Infrared and Raman spectra and normal coordinate analysis of boranediamine" J. Phys. Chem. 86, 4737-4745, 1982 10.1021/j100221a019
1982Tho/Gwi:3822-3827 LR Thorne, WD Gwinn "Microwave spectra and molecular structure of boranediamine" J. Am. Chem. Soc. 1982, 104, 3822-3827 10.1021/ja00378a008

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