Tetrakis(2-hydroxyphenyl)ethene and Derivatives. A Structurally Preorganized Tetradentate Ligand System for Polymetallic Coordination Chemistry and Catalysis

2002 ◽  
Vol 124 (34) ◽  
pp. 9988-9989 ◽  
Author(s):  
Udo Verkerk ◽  
Megumi Fujita ◽  
Trevor L. Dzwiniel ◽  
Robert McDonald ◽  
Jeffrey M. Stryker
Keyword(s):  
Coordination Chemistry ◽  
Tetradentate Ligand ◽  
Ligand System

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

2009 ◽  
Vol 48 (19) ◽  
pp. 9419-9426 ◽  
Author(s):  
Suzanne C. Bart ◽  
Frank W. Heinemann ◽  
Christian Anthon ◽  
Christina Hauser ◽  
Karsten Meyer
Keyword(s):  
Coordination Chemistry ◽  
Tripodal Ligand ◽  
Ligand System

scholarly journals 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

2016 ◽  
Vol 72 (11) ◽  
pp. 768-776 ◽  
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.

Synthesis and Tin(IV) Coordination Chemistry of the Novel Tripod N(CH2CH2CH2SH)3

2003 ◽  
Vol 58 (10) ◽  
pp. 1030-1033 ◽  
Author(s):  
F. Ekkehardt Hahn ◽  
Andreas Dittler-Klingemann ◽  
Thomas Lügger
Keyword(s):  
Coordination Chemistry ◽  
Structure Analysis ◽  
Dinuclear Complex ◽  
The Novel ◽  
Tetradentate Ligand ◽  
Subsequent Reaction ◽  
X Ray

The novel tetradentate ligand N(CH2CH2CH2SH)3, H3 - 5 was synthesized from tripropanolamine via the trichloride, subsequent reaction with potassium thioacetate and reduction with LiAlH4. Ligand H3 -5 reacts with MeSnCl3 under formation of the centrosymmetric dinuclear complex [MeSn(5)]2, 6, which was shown by X-ray structure analysis to contain two tetrahedrally coordinated tin atoms and two bridging thiolato functions.

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

2009 ◽  
pp. 5284 ◽  
Author(s):  
Philip W. Miller ◽  
Nicholas J. Long ◽  
Andrew J. P. White
Keyword(s):  
Coordination Chemistry ◽  
Ligand System

ChemInform Abstract: Synthesis of Chiral Cobalt Complexes with Planoid-Tetradentate Ligand System.

ChemInform ◽  
2010 ◽  
Vol 24 (24) ◽  
pp. no-no
Author(s):  
R. HAERTER ◽  
C. WEYMUTH ◽  
R. SCHEFFOLD ◽  
P. ENGEL ◽  
A. LINDEN
Keyword(s):  
Cobalt Complexes ◽  
Tetradentate Ligand ◽  
Ligand System

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

2018 ◽  
Vol 47 (8) ◽  
pp. 2511-2521 ◽  
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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