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Inorganic Triphenylphosphine.

Adam D Gorman¹, Jonathan A Bailey¹, Natalie Fey¹

¹School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.

Angewandte Chemie (International Ed. in English)

|October 13, 2018

Summary

This summary is machine-generated.

Researchers synthesized an inorganic analog of triphenylphosphine, PBaz₃. Despite similar structures and Lewis basicities, PBaz₃ exhibits distinct reactivity, driven by strong boron-oxygen bonds, unlike its organic counterpart.

Keywords:

boron inorganic chemistry main group elements phosphorus structure elucidation

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Area of Science:

Inorganic chemistry
Organophosphorus chemistry
Materials science

Background:

Triphenylphosphine (PPh₃) is a widely studied organophosphorus compound.
Organophosphorus compounds play crucial roles in various chemical applications.
Exploring inorganic analogs can reveal novel reactivity and properties.

Purpose of the Study:

To synthesize and characterize a completely inorganic analog of triphenylphosphine.
To compare the structural, electronic, and reactive properties of the inorganic analog (PBaz₃) with PPh₃.
To elucidate the factors governing the differing chemical behavior of PBaz₃ and PPh₃.

Main Methods:

Synthesis of the inorganic compound PBaz₃ (where Baz = B₃H₂N₃H₃).
X-ray crystallography to compare crystal structures of PBaz₃ and PPh₃.
Comparative studies of Lewis basicity, oxygenation, and hydrolysis reactions.

Main Results:

PBaz₃, an inorganic triphenylphosphine analog, was successfully prepared.
Crystal structures show superficial similarities between PBaz₃ and PPh₃.
Lewis basicities are comparable, but oxygenation and hydrolysis reactions differ significantly.
PBaz₃ undergoes quantitative hydrolysis to PH₃ and oxygenation to P(OBaz)₃, unlike PPh₃.
The B-O bond strength is identified as the thermodynamic driver for these differences.

Conclusions:

The inorganic analog PBaz₃ displays unique reactivity compared to PPh₃.
The strength of the B-O bond is a key factor in the distinct chemical behavior of PBaz₃.
This work opens avenues for novel inorganic materials with tunable properties.