Employing Dianionic Macrocyclic Tetracarbenes To Synthesize Neutral Divalent Metal Complexes
作者:Heather M. Bass、S. Alan Cramer、Alexander S. McCullough、Karl J. Bernstein、Christopher R. Murdock、David M. Jenkins
DOI:10.1021/om400043z
日期:2013.4.8
Macrocyclictetraimidazolium diborate ligand precursors with two different ring sizes have been synthesized by ring-forming reactions between diimidazoles and haloboranes. Deprotonation of the macrocyclictetraimidazoliums with n-butyllithium followed by the addition of divalent metal salts of palladium or nickel leads to macrocyclic tetracarbene complexes with an 18-atom macrocycle, but not the 16-atom