When is a metallopolymer not a metallopolymer? When it is a metallomacrocycle
作者:Edwin C. Constable、Kate Harris、Catherine E. Housecroft、Markus Neuburger
DOI:10.1039/c0dt01216e
日期:——
cases, and the single crystal X-ray structures of [Co2(3)2][PF6]4·6MeCN and [Co2(4)2][PF6]5·2MeCN (a mixed cobalt(II)/cobalt(III) species) are presented. Oxidation of the equilibrated cobalt(II) mixtures to kinetically inert cobalt(III) species provides additional evidence for the formation of metallomacrocycles as the thermodynamic products. Single crystal structural data for [Co3(2)3][PF6]9·2MeCN·3.5H2O
Formation of [2 + 2] diruthenium(ii) metallomacrocycles from ligands containing 2,2′:6′,2″-terpyridine domains linked through flexible polyethyleneoxy spacers
作者:Edwin C. Constable、Catherine E. Housecroft、Markus Neuburger、Silvia Schaffner、Christopher B. SmithCurrent address: School of Bio
DOI:10.1039/b504670j
日期:——
The syntheses of three ligands containing two terpy metal-binding domains linked through flexible polyethyleneoxy spacers are described. These ligands have been utilised as building blocks in a two-step process for the formation of a series of dinuclear ruthenium(II) metallomacrocycles of the type [Ru2L2]4+. Employing a two-step methodology allows the formation of homoleptic ([Ru2L2]4+) and heteroleptic ([Ru2LLâ²]4+) species in which the ligands differ in the length of the polyethyleneoxy spacer connecting each terpy motif. Homoleptic metallomacrocycles have been characterised through single crystal X-ray diffraction studies, while 2D-NMR spectroscopy has been employed for the characterisation of the heteroleptic species.