Aggregation Behavior of a Six‐Membered Cyclic Frustrated Phosphane/Borane Lewis Pair: Formation of a Supramolecular Cyclooctameric Macrocyclic Ring System. Issue 3 (12th December 2018)

• Record Type: Journal Article
• Authors: Jie, Xiaoming; Daniliuc, Constantin G.; Knitsch, Robert; Hansen, Michael Ryan; Eckert, Hellmut; Ehlert, Sebastian; Grimme, Stefan; Kehr, Gerald; Erker, Gerhard
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 3(2019)
• Page Start: 882
• Page End: 886
• Publication Date: 2018-12-12
• Subjects: boranes -- frustrated Lewis pairs -- macrocycles -- phosphanes -- self-assembly; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201811873
• Languages: English
• ISSNs: 1433-7851

Abstract

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. Abstract : A new frustration : A six‐membered cyclic frustrated phosphane/borane Lewis pair forms a macrocyclic cyclooctameric structure in the crystal and in solution at low temperature. The supramolecular frustrated Lewis pair assembly has an inner diameter of about 12 to 13 Å.