Premium
Boron‐Centered Scorpionate‐Type NHC‐Based Ligands and Their Metal Complexes
Author(s) -
Santini Carlo,
Marinelli Marika,
Pellei Maura
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.201600133
Subject(s) - chemistry , boron , denticity , carbene , transition metal , reactivity (psychology) , coordination complex , tris , metal , combinatorial chemistry , polymer chemistry , catalysis , stereochemistry , organic chemistry , medicine , biochemistry , alternative medicine , pathology
The success enjoyed in the last 50 years by use of poly(pyrazolyl)borates as ligands has inspired the development of a great number of scorpionates containing other donor elements. These include polytopic bis‐ and tris(NHC)borate ligands, featuring N‐heterocyclic carbene (NHC) moieties that generally coordinate as bidentate κ 2 C or tridentate κ 3 C , respectively. In spite of structural similarities between poly(pyrazolyl)borates and poly(NHC)borates, their methods of synthesis and their reactivity are different and reflect the variations in topology, flexibility, and donor properties. The structural and electronic properties of poly(NHC)borate ligands are compared and correlated with their coordination chemistry, particularly towards transition metals. The advances in the chemistry of scorpionate‐type bis‐ and tris(NHC)borate ligands are reviewed by highlighting and comparing their structural properties and their ability to stabilize low to high metal oxidation states in transition‐metal complexes.