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Synthesis of Double-Bridged Cofacial Nickel Porphyrin Dimers with 2,2′-Bipyridyl Pillars and Their Restricted Coordination Space
journal contribution
posted on 2020-05-22, 18:35 authored by Akiharu Satake, Yuta Katagami, Yuki Odaka, Yusuke Kuramochi, Shohei Harada, Takaya Kouchi, Hajime Kamebuchi, Makoto TadokoroDouble-bridged cofacial
Ni porphyrin dimers 2 with
2,2′-bipyridyl pillars were effectively prepared by a one-step
reductive homocoupling reaction of bis(chloropyridyl)-substituted
Ni porphyrin derivatives followed by a specific separation of a cyanopropyl-modified
silica gel column using pyridine eluent systems. The structural analyses
of 2 and its Pd complex were carried out in their solid
and solution states by means of X-ray single crystal analysis and
NMR, respectively. The complexation of η3-allylpalladium
chloride (Pd) with 2 on the spatially restricted
2,2-bipyridine moieties on 2 gave a 2:1 (Pd:2) complex, in which the 2,2′-bipyridine ligands
only provided one of the N atoms on a 2,2′-bipyridine ligand
to a Pd. Therefore, the 2,2-bipyridine moieties acted
as a monodentate ligand.
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moietiebipyridinereductive homocoupling reactionRestricted Coordination Space Double-bridged cofacial Ni porphyrin dimers 2PdDouble-Bridged Cofacial Nickel Porphyrin Dimersmonodentate ligandη 3pyridine eluent systemsallylpalladium chloridesolution statescyanopropyl-modified silica gel columncrystal analysisNMRN atoms
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