Boron‐Centered Scorpionate‐Type NHC‐Based Ligands and Their Metal Complexes. Issue 15 (12th May 2016)

• Record Type: Journal Article
• Authors: Santini, Carlo; Marinelli, Marika; Pellei, Maura
• Other Names: Pettinari C. guestEditor.
• Is Part Of: European journal of inorganic chemistry. Issue 15/16(2016)
• Page Start: 2312
• Page End: 2331
• Publication Date: 2016-05-12
• Subjects: Scorpionates -- Chelates -- Carbene ligands -- Ligand effects -- Coordination modes -- N‐Heterocyclic carbenes -- Poly(NHC)borates; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201600133
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : 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. Abstract : The advances in the design and coordination chemistry of scorpionate‐type poly(NHC)borate ligands are described, highlighting their topology, flexibility, donor properties, synthesis, and reactivity pathways. The structural and electronic properties of these ligands are compared and correlated with their chemistry, particularly that of the transition metals.