High-valent dioxo-ruthenium(VI) complexes of macrocyclic tetradentate tertiary amines: X-ray crystal structures of trans-[RuVI(15-tmc)O2](ClO4)2(15-tmc = 1,4,8,12-tetramethyl-1,4,8,12-tetra-azacyclopentadecane) and trans-[RuVI(16-tmc)O2](ClO4)2(16-tmc = 1,5,9,13-tetramethyl-1,5,9,13-tetra-azacyclohexadecane)

Abstract

The X-ray crystal structures of trans-[Ru^VI(15-tmc)O₂](ClO₄)₂(15-tmc = 1,4,8,12-tetramethyl-1,4,8,12-tetra-azacyclopentadecane) and trans-[Ru^VI(16-tmc)O₂](ClO₄)₂(16-tmc = 1,5,9,13-tetramethyl-1,5,9,13-tetra-azacyclohexadecane) have been determined; the RuO bond distances in these two complexes, 1.718(5) and 1.705(7)Å respectively, appear to be insensitive to the ring size of the macrocycle.