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Unexpected Macrocyclic Multinuclear Zinc and Nickel Complexes that Function as Multitasking Catalysts for CO 2 Fixations
Author(s) -
Takaishi Kazuto,
Nath Bikash Dev,
Yamada Yuya,
Kosugi Hiroyasu,
Ema Tadashi
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201904224
Subject(s) - chemistry , bimetallic strip , catalysis , formylation , zinc , nickel , ring (chemistry) , crystallography , stereochemistry , medicinal chemistry , polymer chemistry , organic chemistry
Abstract Unique self‐assembled macrocyclic multinuclear Zn II and Ni II complexes with binaphthyl‐bipyridyl ligands (L) were synthesized. X‐ray analysis revealed that these complexes consisted of an outer ring (Zn 3 L 3 or Ni 3 L 3 ) and an inner core (Zn 2 or Ni). In the Zn II complex, the inner Zn 2 part rotated rapidly inside the outer ring in solution on an NMR timescale. These complexes exhibited dual catalytic activities for CO 2 fixations: synthesis of cyclic carbonates from epoxides and CO 2 and temperature‐switched N ‐formylation/ N ‐methylation of amines with CO 2 and hydrosilane.