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Experimental data for BH3NH3 (borane ammonia)

22 02 02 11 45
INChI INChIKey SMILES IUPAC name
InChI=1S/BH6N/c1-2/h1-2H3 PJYXJGDRFASJSB-UHFFFAOYSA-N [BH3-][NH3+]
State Conformation
1A1 C3V
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Barrier to Internal Rotation 8.4   kJ mol-1 1983Tho/Sue:167 V3 = 2.008 kcal mol-1 (702 cm-1)
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 3337   2012Sam/Xan:3124      
2 A1 2299   2012Sam/Xan:3124      
3 A1 1289          
4 A1 1178          
5 A1 603          
7 E 3418          
8 E 2406          
9 E 1611          
10 E 1186          
11 E 1042          

Calculated vibrational frequencies for BH3NH3 (borane ammonia).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
  17899.44000   2008Dem/Lie:4477

Calculated rotational constants for BH3NH3 (borane ammonia).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of borane ammonia

Point Group C3v


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
rBN 1.645 0.000 1 2 2008Dem/Lie:4477
rBH 1.206 0.000 1 3 2008Dem/Lie:4477
rNH 1.010 0.000 2 6 2008Dem/Lie:4477
aHBN 105 0.002 2 1 3 2008Dem/Lie:4477
aHNB 110.97 0.02 1 2 6 2008Dem/Lie:4477

Cartesians
Atom x (Å) y (Å) z (Å)
B1 0.0000 0.0000 -0.9223
N2 0.0000 0.0000 0.7230
H3 0.0000 -1.1647 -1.2344
H4 -1.0087 0.5824 -1.2344
H5 1.0087 0.5824 -1.2344
H6 0.0000 0.9432 1.0845
H7 -0.8168 -0.4716 1.0845
H8 0.8168 -0.4716 1.0845

Atom - Atom Distances bond lengths
Distances in Å
  B1 N2 H3 H4 H5 H6 H7 H8
B1   1.64531.20581.20581.20582.21742.21742.2174
N2 1.6453   2.27772.27772.27771.01011.01011.0101
H3 1.20582.2777   2.01732.01733.13382.55442.5544
H4 1.20582.27772.0173   2.01732.55442.55443.1338
H5 1.20582.27772.01732.0173   2.55443.13382.5544
H6 2.21741.01013.13382.55442.5544   1.63371.6337
H7 2.21741.01012.55442.55443.13381.6337   1.6337
H8 2.21741.01012.55443.13382.55441.63371.6337  

Calculated geometries for BH3NH3 (borane ammonia).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
B1 N2 H6 110.970 B1 N2 H7 110.970
B1 N2 H8 110.970 N2 B1 H3 105.000
N2 B1 H4 105.000 N2 B1 H5 105.000
H3 B1 H4 113.548 H3 B1 H5 113.548
H4 B1 H5 113.548 H6 N2 H7 107.932
H6 N2 H8 107.932 H7 N2 H8 107.932

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
B-N 1
H-B 3
H-N 3

Connectivity
Atom 1 Atom 2
B1 N2
B1 H3
B1 H4
B1 H5
N2 H6
N2 H7
N2 H8
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
9.440 0.020 10.330   webbook
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 C3v True     5.216 5.216 1983Tho/Sue:167 ± 0.017 D C3v 1 1
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 BH3NH3 (borane ammonia).
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 C3v True       C3v 1 1

Calculated electric quadrupole moments for BH3NH3 (borane ammonia).

References
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squib reference DOI
1983Tho/Sue:167 LR Thorne, RD Suenram, FJ Lovas "Microwave spectrumm, torsional barrier, and structure of BH3NH3" J. Chem. Phys. 1983, 78, 167-171 10.1063/1.444528
2008Dem/Lie:4477 J Demaison, J Lievin, AG Csazar, C Gutle "Equilibrium Structure and Torsional Barrier of BH3NH3" J. Phys. Chem. A 2008, 112, 4477-4482 10.1021/jp710630j
2012Sam/Xan:3124 RL Sams, SS Xantheas, TA Blake "Vapor Phase Infrared Spectroscopy and Ab Initio Fundamental Anharmonic Frequencies of Ammonia Borane" J. Phys. Chem. A 2012, 116, 3124-3136 10.1021/jp2115753
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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