Molecular and electronic structures of paramagnetic gallium complexes with differently charged o-quinone ligands

Donor‐Acceptor Tin(IV) Complexes with α‐Diimine and Catecholate Ligands

“…At present, the number of papers describing LL′CT complexes based on non‐transition elements is not so numerous. Recently, the possibility of intramolecular charge transfer between the donor and acceptor ligands has been demonstrated in gallium(III) [12] and zinc(II) [13] complexes with a distorted tetragonal‐pyramidal coordination polyhedron. The octahedral structure of gallium(III) coordination compounds designed with the same ligand systems does not provide conditions for the occurrence of such charge transfer [12a,14] .…”

“…Recently, the possibility of intramolecular charge transfer between the donor and acceptor ligands has been demonstrated in gallium(III) [12] and zinc(II) [13] complexes with a distorted tetragonal‐pyramidal coordination polyhedron. The octahedral structure of gallium(III) coordination compounds designed with the same ligand systems does not provide conditions for the occurrence of such charge transfer [12a,14] . At the same time, the realization of charge transfer with absorption in the UV region for distorted octahedral germanium(IV) complexes based on 2,3‐dihydroxynaphthalene ligand and bipyridyl or phenanthroline was recently demonstrated by the authors [15] …”

[4,6-Di-tert-butyl-N-(2,6-Dimethylphenyl)-o-Amidophenolato][4,6-Di-tert-butyl-N-(2,6-Dimethylphenyl)-o-Iminobenzosemiquinolato](2,2′-Bipyridyl)Indium(III)

“…The development of sibling LL CT chromophores based on main-group metals seems exceedingly attractive since it would allow one to cheapen the potential production process. Recently, we have synthesized several LL CT gallium complexes, bearing the quinone-type redox-active ligands as donor and 2,2 -bipyridyl as acceptor [34][35][36]. Furthermore, in the complexes with two differently charged o-quinone ligands, the absorption maximum shifts to the near IR region [35].…”

“…Recently, we have synthesized several LL CT gallium complexes, bearing the quinone-type redox-active ligands as donor and 2,2 -bipyridyl as acceptor [34][35][36]. Furthermore, in the complexes with two differently charged o-quinone ligands, the absorption maximum shifts to the near IR region [35]. Here, we report the synthesis and characterization of a new indium(III) complex containing o-iminobenzoquinone ligands in different redox states (radical anion and dianion) along with neutral 2,2 -bipyridyl in the metal coordination sphere.…”