A review. Redox-active unsatd. chelate ligands can be realized with different ring sizes of the resulting metallacycles. An overview is presented, starting from an exposition of non-innocent behavior and chelate effects. A systematic approach is used to describe the most familiar situation, the metal complexes of 1,4-hetero-1,3-dienes in established forms (e.g. o-quinone, a-dithiolene, and a-diimine ligands) and with less common combinations of O, S, and N heteroatoms. The different steric and electronic conditions in six-membered chelate ring systems derived from the b-diketonate structure will be discussed with examples of substituted and p extended ligands, including 9-oxidophenalenyl, formazanate, and anions derived from indigo or 9,10-anthraquinone. Four-membered chelate rings existing in at least two ligand-based oxidn. states are available through steric and electronic stabilization in amidinate or triazenide complexes. Three-membered and seven-membered chelate ring situations are discussed briefly as further alternatives. on SciFinder(R)
%0 Journal Article
%1 Kaim.2019c
%A Kaim, Wolfgang.
%D 2019
%J Dalton Transactions
%K ligand metallacycle noninnocent review with
%N 24
%P 8521--8529
%R 10.1039/c9dt01411j
%T Chelate rings of different sizes with non-innocent ligands
%V 48
%X A review. Redox-active unsatd. chelate ligands can be realized with different ring sizes of the resulting metallacycles. An overview is presented, starting from an exposition of non-innocent behavior and chelate effects. A systematic approach is used to describe the most familiar situation, the metal complexes of 1,4-hetero-1,3-dienes in established forms (e.g. o-quinone, a-dithiolene, and a-diimine ligands) and with less common combinations of O, S, and N heteroatoms. The different steric and electronic conditions in six-membered chelate ring systems derived from the b-diketonate structure will be discussed with examples of substituted and p extended ligands, including 9-oxidophenalenyl, formazanate, and anions derived from indigo or 9,10-anthraquinone. Four-membered chelate rings existing in at least two ligand-based oxidn. states are available through steric and electronic stabilization in amidinate or triazenide complexes. Three-membered and seven-membered chelate ring situations are discussed briefly as further alternatives. on SciFinder(R)
@article{Kaim.2019c,
abstract = {A review. Redox-active unsatd. chelate ligands can be realized with different ring sizes of the resulting metallacycles. An overview is presented, starting from an exposition of non-innocent behavior and chelate effects. A systematic approach is used to describe the most familiar situation, the metal complexes of 1,4-hetero-1,3-dienes in established forms (e.g. o-quinone, \textgreek{a}-dithiolene, and \textgreek{a}-diimine ligands) and with less common combinations of O, S, and N heteroatoms. The different steric and electronic conditions in six-membered chelate ring systems derived from the \textgreek{b}-diketonate structure will be discussed with examples of substituted and \textgreek{p} extended ligands, including 9-oxidophenalenyl, formazanate, and anions derived from indigo or 9,10-anthraquinone. Four-membered chelate rings existing in at least two ligand-based oxidn. states are available through steric and electronic stabilization in amidinate or triazenide complexes. Three-membered and seven-membered chelate ring situations are discussed briefly as further alternatives. [on SciFinder(R)]},
added-at = {2019-07-15T13:41:23.000+0200},
author = {Kaim, Wolfgang.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2073d266046c95391d41dbc0f05fb4267/b_schwederski},
doi = {10.1039/c9dt01411j},
interhash = {ad93140e89ccec5724f80b2e31bc586a},
intrahash = {073d266046c95391d41dbc0f05fb4267},
issn = {1477-9226},
journal = {Dalton Transactions},
keywords = {ligand metallacycle noninnocent review with},
number = 24,
pages = {8521--8529},
timestamp = {2019-07-15T11:42:10.000+0200},
title = {Chelate rings of different sizes with non-innocent ligands},
volume = 48,
year = 2019
}