Unexpected neutral aza-macrocycle complexes of sodium

摘要

Highly unusual Na~+ complexes with neutral tri- and tetra-amines are isolable in good yield from the reaction of NaBAr~F with the amine in organic media. Structural characterisation reveals primary Na-N bonding, including an unusual sandwich cation [Na(Me_3tacn)_2]~+, derived from homoleptic N_6-coordination via two Me_3-tacn ligands, and the distorted 5-coordinate [Na(thf)(Me_4cyclam)]~+.