Indium trihydride is an

inorganic In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...

compound Compound may refer to: Architecture and built environments * Compound (enclosure), a cluster of buildings having a shared purpose, usually inside a fence or wall ** Compound (fortification), a version of the above fortified with defensive struct ...

with the

chemical formula In chemistry, a chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, ...

(). It has been observed in

matrix isolation Matrix isolation is an experimental technique used in chemistry and physics. It generally involves a material being trapped within an unreactive matrix. A ''host'' matrix is a continuous solid phase in which ''guest'' particles (atoms, molecules, i ...

and

laser ablation Laser ablation or photoablation (also called laser blasting) is the process of removing material from a solid (or occasionally liquid) surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser ...

experiments. Gas phase stability has been predicted. The

infrared spectrum Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye. IR is generally understood to encompass wavelengths from around ...

was obtained in the gas phase by

of indium in presence of hydrogen gas InH₃ is of no practical importance.

Chemical properties

Solid InH₃ is a three-dimensional network

polymer A polymer (; Greek '' poly-'', "many" + ''-mer'', "part") is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic a ...

ic structure, where In atoms are connected by In-H-In bridging bonds, is suggested to account for the growth of broad infrared bands when samples of InH₃ and InD₃ produced on a solid hydrogen matrix are warmed. Such a structure is known for solid AlH₃. When heated above , indium trihydride decomposes to produce indium–hydrogen alloy and elemental

hydrogen Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula . It is colorless, odorless, tasteless, non-toxic, an ...

. As of 2013, the only known method of synthesising indium trihydride is the autopolymerisation of indane below .

Other indium hydrides

left, 188px, Structure of the adduct of InH₃ and .html" ;"title="tricyclohexylphosphine.">tricyclohexylphosphine. Several compounds with In-H bonds have been reported. Examples of complexes with two hydride ligands replaced by other ligands are K₃ (Me₂SiO)₇HIn(Me₃CCH₂)₃]₄ and HIn(2-Me₂NCH₂-C₆H₄)₂. Although InH₃ is labile, adducts are known with the stoichiometry InH₃L_n (n = 1 or 2). 1:1 amine adducts are made by the reaction of LiInH₄ with a trialkylammonium salt. The trimethylamine complex is only stable below −30 °C or in dilute solution. The 1:1 and 1:2 complexes with tricyclohexylphosphine (PCy₃) have been characterised crystallographically. The average In-H bond length is 168 pm. Indium hydride is also known to form adducts with Persistent carbene, NHCs.

References

{{Hydrides by group Indium compounds Metal hydrides