Structural development of free or coordinated 4'-(4-pyridyl)-2,2':6',2''-terpyridine ligands through N-alkylation: new strategies for metallamacrocycle formation.
A series of N-alkylated derivatives of [Ru(pytpy)(2)]2+ (pytpy=4'-(4-pyridyl)-2,2':6',2''-terpyridine) has been synthesised and characterised. These include both model and functionalised complexes that complement previously reported iron(II) analogues. Reaction of [Ru(pytpy)(2)]2+ with bis[4-(bromomethyl)phenyl]methane leads to the formation of a [2+2] ruthenamacrocycle. Related ferramacrocycles could not be accessed by this route, and instead were prepared in two steps by first reacting bis[4-(bromomethyl)phenyl]methane or 4,4'-bis(bromomethyl)biphenyl with two equivalents of pytpy, and then treating the resulting bis(N-alkylated) product with iron(II) salts.
Constable
Edwin C
EC
Department of Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland. edwin.constable@unibas.ch
Dunphy
Emma L
EL
Housecroft
Catherine E
CE
Kylberg
William
W
Neuburger
Markus
M
Schaffner
Silvia
S
Schofield
Emma R
ER
Smith
Christopher B
CB
D000478:Alkylation; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
C517923:(2,2'-6',2'')-terpyridine; D008024:Ligands; D009942:Organometallic Compounds; D011725:Pyridines; D012428:Ruthenium