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Synthese von Nickelkomplexen mit porphinoidem Ligandsystem
Author(s) -
Löliger Jürg,
Scheffold Rolf
Publication year - 1977
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19770600816
Subject(s) - chemistry , nickel , tetrafluoroborate , methoxide , annulene , ligand (biochemistry) , octahedron , medicinal chemistry , stereochemistry , ion , organic chemistry , catalysis , biochemistry , ionic liquid , receptor
Synthesis of nickel complexes with a porphine‐type ligand system In the presence of nickel(II) salts the bicyclic vinylogous amidine 1 is dimerized to the diamagnetic (1‐amino‐10,20‐diaza‐octahydroporphinato)nickel(II) complex 3 . The condensation proceeds through a paramagnetic octahedral nickel(II) complex 2 . Starting from 3 , the (hexadecamethyl‐10,20‐diaza‐hexahydroporphin)nickel bis (tetrafluoroborate) 7 (a (hexaaza [16]annulene)nickel(II) complex) was prepared in two steps. This highly electrophilic compound adds methoxide ions in consecutive and reversible steps to form first the (1‐methoxy‐10,20‐diaza‐octahydroporphinato)nickel tetrafluoroborate 8 and then the [ cis ‐1, 11‐dimethoxy‐decahydroporphinato (2‐)]nickel 6. 6, 7 and 8 were fully characterized and interconverted by addition and elimination reactions.