Synthesis, characterization, and x-ray molecular structures of mono- and dinuclear copper complexes with 2,7-bis(2-pyridyl)-1,8-naphthyridine

Synthesis, crystal structures, and electronic spectra of (1,8-naphthyridine)ReI(CO)3Cl and [(1,8-naphthyridine)CuI(DPEPhos)]PF6

“…Nap and its derivatives can act as monodentate [3][4][5][6], bidentate [5][6][7][8] and dinuclear bridging [3,5,[9][10][11] ligands. Due to this variability of binding and the ease of preparation, the nap moiety is a versatile building block for several ligand systems [12][13][14][15][16][17][18] yielding complexes which display interesting structural [3][4][5][6][7][8][9][10], magnetic, [9] luminescent, [17] catalytic [11,19] and electrochemical [8,13,18,20] properties. For instance, nap is frequently used as a bridging ligand in Rh I -and Ni II -complexes, where a close metal contact is achieved by the geometrical demand of the ligand.…”

“…Whereas the Cu-P bond lengths are comparable [Cu1-P1 2.2426 (5) averaged Cu1-N nap distance of 2.025(1) Å of the latter complex is the same as the Cu1-N1 contact in 2. In [Cu(bpnap)(PPh 3 ) 2 ]PF 6 (bpnap = 2,7-bis(2-pyridyl)-1,8-naphthyridine), the copper atom is also complexed by two nitrogen atoms, one stemming from nap and the other one from the pyridine moiety [14].…”

Coordination Chemistry of an Unsymmetrical Naphthyridine‐Based Tetradentate Ligand toward Various Transition‐Metal Ions

“…[1d] Accordingly, the introduction of ligands able to accommodate metal ions in close proximity to each other has received much attention. Among various ligands designed for dinuclear systems, 2,7‐disubstituted 1,8‐naphthyridine‐based ligands ( L 1 – L 4 ) (Figure ) have been extensively employed in the construction of dimetallic complexes containing two metal ions within a short distance . Indeed, ligand L 1 has been shown to form stable dirhodium [Rh–Rh 2.405(2) Å], diruthenium [Ru–Ru 2.273(4) Å] and dicopper [Cu–Cu 3.094 Å] complexes.…”

“…Among various ligands designed for dinuclear systems, 2,7‐disubstituted 1,8‐naphthyridine‐based ligands ( L 1 – L 4 ) (Figure ) have been extensively employed in the construction of dimetallic complexes containing two metal ions within a short distance . Indeed, ligand L 1 has been shown to form stable dirhodium [Rh–Rh 2.405(2) Å], diruthenium [Ru–Ru 2.273(4) Å] and dicopper [Cu–Cu 3.094 Å] complexes. [13c], [16j] In addition, the metal ions are separated by 3.22 Å in the dinickel complex based on ligand L 2 ,[16i] 2.9534(2) Å in the dicopper complex based on ligand L 3 , and 2.449(1)–2.7328(5) Å in the dicopper complexes based on ligand L 4 .…”

“…Indeed, ligand L 1 has been shown to form stable dirhodium [Rh–Rh 2.405(2) Å], diruthenium [Ru–Ru 2.273(4) Å] and dicopper [Cu–Cu 3.094 Å] complexes. [13c], [16j] In addition, the metal ions are separated by 3.22 Å in the dinickel complex based on ligand L 2 ,[16i] 2.9534(2) Å in the dicopper complex based on ligand L 3 , and 2.449(1)–2.7328(5) Å in the dicopper complexes based on ligand L 4 . As a continuation of our efforts to develop new dimetallic complexes, we report here the preparation of unsymmetrical naphthyridine‐based ligand L 5 (Figure ) and its complexation with various metal ions.…”