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Coordination Chemistry of an Unsymmetrical Naphthyridine‐Based Tetradentate Ligand toward Various Transition‐Metal Ions
Author(s) -
Tsai BingChen,
Liu YiHung,
Peng ShieMing,
Liu ShiuhTzung
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201600163
Subject(s) - chemistry , chlorobenzene , ligand (biochemistry) , transition metal , nickel , metathesis , medicinal chemistry , catalysis , salt metathesis reaction , metal , organometallic chemistry , polymer chemistry , organic chemistry , polymerization , polymer , biochemistry , receptor
An unsymmetrical ligand, 2‐(2‐pyridinyl)‐7‐(pyrazol‐1‐yl)‐1,8‐naphthyridine ( L 5 ) was prepared for the construction of a series of dinuclear complexes. Treatment of L 5 with [Ru 2 (µ‐OAc) 4 Cl] followed by anion metathesis afforded [( L 5 )(µ‐OAc) 3 Ru 2 ](PF 6 ) ( 3 ). Reaction of L 5 with 2 equiv. of Ni(OAc) 2 provided [Ni 4 ( L 5 ) 2 (µ‐OH) 4 (CF 3 COO) 2 ](CF 3 COO) 2 ( 5 ). Reaction of [Re 2 (CO) 8 (CH 3 CN) 2 ] with L 5 in a refluxing chlorobenzene solution gave a mixture of dirhenium ( 6 ) and monorhenium ( 7 ) complexes. The monocobalt complex 8 was obtained from complexation of L 5 with CoCl 2 . These new complexes were characterized by elemental analysis and spectroscopic techniques. The structures of complexes 3 , 5 and 8 were further confirmed by X‐ray crystallography. Nickel complex 5 was evaluated as a catalyst for reduction reactions involving the conversion of ester functionalities into their corresponding alcohols.