Bis(4-benzhydryl-benzoxazol-2-yl)methane - from a Bulky NacNac Alternative to a Trianion in Alkali Metal Complexes.

ABSTRACT: A novel sterically demanding bis(4-benzhydryl-benzoxazol-2-yl)methane ligand 6 (^4-BzhH2 BoxCH₂ ) was gained in a straightforward six-step synthesis. Starting from this ligand monomeric [M(^4-BzhH2 BoxCH)] (M=Na (7), K (8₁ )) and dimeric [{M(^4-BzhH2 BoxCH)}₂ ] (M=K (8₂ ), Rb (9), Cs (10)) alkali metal complexes were synthesised by deprotonation. Abstraction of the potassium ion of 8 by reaction with 18-crown-6 resulted in the solvent separated ion pair [{(THF)₂ K@(18-crown-6)}{bis(4-benzhydryl-benzoxazol-2-yl)methanide}] (11), including the energetically favoured monoanionic (E,E)-(^4-BzhH2 BoxCH) ligand. Further reaction of ^4-BzhH2 BoxCH₂ with three equivalents KH and two

SUBMITTER: Kretsch J 

PROVIDER: S-EPMC8361911 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature