Synthesis, characterisation and coordination chemistry of a new multidentate P2N4 ligand system

A New Tripodal Ligand System with Steric and Electronic Modularity for Uranium Coordination Chemistry

Inorganic Chemistry ◽

10.1021/ic9012697 ◽

2009 ◽

Vol 48 (19) ◽

pp. 9419-9426 ◽

Cited By ~ 64

Author(s):

Suzanne C. Bart ◽

Frank W. Heinemann ◽

Christian Anthon ◽

Christina Hauser ◽

Karsten Meyer

Keyword(s):

Coordination Chemistry ◽

Tripodal Ligand ◽

Ligand System

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Mono- and binuclear tris(3-tert-butyl-2-sulfanylidene-1H-imidazol-1-yl)hydroborate bismuth(III) dichloride complexes: a soft scorpionate ligand can coordinate top-block elements

Acta Crystallographica Section C Structural Chemistry ◽

10.1107/s2053229616010615 ◽

2016 ◽

Vol 72 (11) ◽

pp. 768-776 ◽

Cited By ~ 1

Author(s):

Kiyoshi Fujisawa ◽

Ayaka Kuboniwa ◽

Mercedesz Kiss ◽

Robert K. Szilagyi

Keyword(s):

Coordination Chemistry ◽

Toxic Metal ◽

Coordination Geometry ◽

Toxic Heavy Metal ◽

Bond Lengths ◽

H Nmr ◽

Ligand System ◽

Direct Measurements ◽

Binuclear Structure ◽

Sulfur Containing

Tris(pyrazolyl)hydroborate ligands have been utilized in the fields of inorganic and coordination chemistry due to the ease of introduction of steric and electronic substitutions at the pyrazole rings. The development and use of the tris(pyrazolyl)hydroborate ligand, called a `scorpionate', were pioneered by the late Professor Swiatoslaw Trofimenko. He developed a second generation for his ligand system by the introduction of 3-tert-butyl and 3-phenyl substituents and this new ligand system accounted for many remarkable developments in inorganic and coordination chemistry in stabilizing monomeric species while maintaining an open coordination site. Bismuth is remarkably harmless among the toxic heavy metalp-block elements and is now becoming popular as a replacement for highly toxic metal elements, such as lead. Two bismuth(III) complexes of the anionic sulfur-containing tripod tris(3-tert-butyl-2-sulfanylidene-1H-imidazol-1-yl)hydroborate ligand were prepared. By recrystallization from MeOH/CH2Cl2, orange crystals of dichlorido(methanol-κO)[tris(3-tert-butyl-2-sulfanylidene-1H-imidazol-1-yl-κS)hydroborato]bismuth(III), [Bi(C21H34BN6S3)Cl2(CH4O)], (I), were obtained, manifesting a mononuclear structure. By using a noncoordinating solvent, red crystals of the binuclear structure with bridging Cl atoms were obtained, namely di-μ-chlorido-bis{chlorido[tris(3-tert-butyl-2-sulfanylidene-1H-imidazol-1-yl-κS)hydroborato]bismuth(III)}, [Bi2(C21H34BN6S3)2Cl4], (II). These complexes show {BiIIIS3Cl2O} and {BiIIIS3Cl3} coordination geometries with average BiIII—S bond lengths of 2.73 and 2.78 Å in (I) and (II), respectively. The overall BiIIIcoordination geometry is distorted octahedral due to stereochemically active lone pairs. The three BiIII—S bond lengths are almost equal in (I) but show considerable differences in (II), with one long and two shorter distances that also correlate with changes in the UV–Vis and1H NMR spectra. For direct measurements of the Bi—S/Cl coordination, ligand K-edge X-ray absorption measurements were carried out in combination with ground and excited-state electronic structure analyses. Forp-block elements, these sulfur-containing ligands are useful for preparing the appropriate complexes due to their flexible coordination geometry.

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Formation and Structures of [1,2–Bis(N-tert-butylcarbamoyl)cyclopentadienyl]zirconium Complexes – Coordination Chemistry of a “Fulvenologous” Malonic Amide Anion Ligand System

European Journal of Inorganic Chemistry ◽

10.1002/(sici)1099-0682(199901)1999:1<11::aid-ejic11>3.0.co;2-5 ◽

1999 ◽

Vol 1999 (1) ◽

pp. 11-19 ◽

Cited By ~ 14

Author(s):

Katrin Klaß ◽

Lothar Duda ◽

Nina Kleigrewe ◽

Gerhard Erker ◽

Roland Fröhlich ◽

...

Keyword(s):

Coordination Chemistry ◽

Ligand System ◽

Zirconium Complexes

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A new nitrogen rich open chain diazine ligand system: synthesis coordination chemistry and magneto-structural studies

Dalton Transactions ◽

10.1039/c7dt03845c ◽

2018 ◽

Vol 47 (8) ◽

pp. 2511-2521 ◽

Cited By ~ 4

Author(s):

Muhammad U. Anwar ◽

Ahmed Al-Harrasi ◽

Emma L. Gavey ◽

Melanie Pilkington ◽

Jeremy M. Rawson ◽

...

Keyword(s):

Coordination Chemistry ◽

Strong Preference ◽

Structural Studies ◽

Open Chain ◽

System Synthesis ◽

Ligand System ◽

Oxygen Donors

A new series of open chain diazine ligands that have a central bipyridne unit with two side-arms offering a range of ketone/alkoxide oxygen donors, diazine and pyridine terminal groups show a strong preference for binding three metals.

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