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. 2019 Jan 14;58(3):882-886.
doi: 10.1002/anie.201811873. Epub 2018 Dec 12.

Aggregation Behavior of a Six-Membered Cyclic Frustrated Phosphane/Borane Lewis Pair: Formation of a Supramolecular Cyclooctameric Macrocyclic Ring System

Xiaoming Jie  1 , Constantin G Daniliuc  1 , Robert Knitsch  2 , Michael Ryan Hansen  2 , Hellmut Eckert  2   3 , Sebastian Ehlert  4 , Stefan Grimme  4 , Gerald Kehr  1 , Gerhard Erker  1
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Aggregation Behavior of a Six-Membered Cyclic Frustrated Phosphane/Borane Lewis Pair: Formation of a Supramolecular Cyclooctameric Macrocyclic Ring System

Xiaoming Jie et al. Angew Chem Int Ed Engl. .

Abstract

A new six-membered cyclic frustrated phosphane/borane Lewis pair was liberated from its HB(C6 F5 )2 adduct by treatment with vinylcyclohexane. The system is an active frustrated Lewis pair that undergoes cycloaddition reactions with suitable π reagents and it splits dihydrogen. At room temperature in solution the new compound is a monomer, however, in the crystal and in solution at low temperature it aggregates to a thermodynamically favoured supramolecular macrocyclic cyclooctamer.

Keywords: boranes; frustrated Lewis pairs; macrocycles; phosphanes; self-assembly.

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