Zinc Complexes from Bromo Substituted Tris[(2-pyridyl)methyl]amine Ligands. Influence of Sterically Demanding Substituents on Coordination Geometry

2004 ◽  
Vol 630 (89) ◽  
pp. 1210-1214 ◽  
Author(s):  
David Schnieders ◽  
Michael Merkel ◽  
Sascha M. Baldeau ◽  
Bernt Krebs
Keyword(s):  
Zinc Complexes ◽  
Coordination Geometry ◽  
Methyl Amine ◽  
Sterically Demanding ◽  
Amine Ligands

Übergangsmetallkomplexe mit Schwefelliganden, XXXII*: Synthese der sterisch anspruchsvollen Thiolat-amin-Liganden tbu2-ma-H = 2-Mercapto-3,5-di-tbutylanilin und tbu4-bmae-H2 = 1,2-Bis(2-mercapto-3,5-di-tbutylaniIino)ethan sowie ihrer Eisen-, Ruthenium- und Zink-Komplexe [Fe(CO)2(tbu2-ma)2], [Zn(tbu2-ma)2] und [RuL2(tbu4-bmae)], L = CO, PMe3, PPh3/ Transition Metal Complexes with Sulfur Ligands, XXXII*: Synthesis of the Sterically Demanding New Thiolate-amine Ligands tbu2-ma-H = 2-Mercapto-3,5-di-tbutylanilin und tbu4-bmae-H2 = 1,2-Bis(2-mercapto-3,5-di-tbutylaniIino)ethane as well as of their Iron-, Ruthenium- and Zinc Complexes [Fe(CO)2(tbu2-ma)2], [Zn(tbu2-ma)2] and [RuL2(tbu4-bmae)], L = CO, PMe3, PPh3

1987 ◽  
Vol 42 (10) ◽  
pp. 1291-1297 ◽  
Author(s):  
Dieter Sellmann ◽  
Olaf Käppler
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Acid Hydrolysis ◽  
Organic Solvents ◽  
Transition Metal Complexes ◽  
Zinc Complexes ◽  
Metal Centers ◽  
Sterically Demanding ◽  
Amine Ligands ◽  
Soluble Complexes

Abstract In order to obtain soluble complexes containing sterically protected metal centers the new bi- and tetradentate thiolate amine ligands 2-mercapto-3,5-di-tbutylaniline (= tbu2-ma-H) and 1,2-bis(2-mercapto-3,5-di-tbutylanilino)ethane (= tbu4-mae-H2) were synthesized. tbu2-ma-H reacts with FeCl2-4 H2O and CO to give [Fe(CO)2(tbu2-ma)2], with Zn(ac)2 -2 H2O [Zn(tbu2-ma)2] is obtained whose acid hydrolysis and reaction with H2S, respectively, yield pure tbu2-Ina-H. The condensation of tbu2-ma-H with glyoxal yields the respective bis-benzthiazolidine, which is re­duced by LiAlH4 in the presence of Na[N(SiMe3)2] to tbu4-bmae-H2. tbu4-bmae-Li2. reacts with [Ru(CO)3(THF)Cl2], [Ru(PMe3)4Cl2] and [Ru(PPh3)2(CH3CN)2Cl2], respectively, to yield [Ru(L)2(Tm4-bmae)j (L = CO, PMe3, PPh3). The complexes are more soluble in organic solvents than the corresponding unsubstituted bmae complexes, bmae2- = 1,2-bis(2-mercaptoanilino)- ethane(2-).

scholarly journals Sterically Demanding Multidentate Ligand Tris[(2-(6-methylpyridyl))methyl]amine Slows Exchange and Enhances Solution State Ligand Proton NMR Coupling to199Hg(II)

2002 ◽  
Vol 41 (9) ◽  
pp. 2529-2536 ◽  
Author(s):  
Deborah C. Bebout ◽  
James F. Bush ◽  
Kathleen K. Crahan ◽  
Edith V. Bowers ◽  
Raymond J. Butcher
Keyword(s):  
Proton Nmr ◽  
Solution State ◽  
Multidentate Ligand ◽  
Methyl Amine ◽  
Sterically Demanding

scholarly journals Evaluating the Identity and Diiron Core Transformations of a (μ-Oxo)diiron(III) Complex Supported by Electron-Rich Tris(pyridyl-2-methyl)amine Ligands

2012 ◽  
Vol 51 (4) ◽  
pp. 2393-2402 ◽  
Author(s):  
Loi H. Do ◽  
Genqiang Xue ◽  
Lawrence Que ◽  
Stephen J. Lippard
Keyword(s):  
Methyl Amine ◽  
Amine Ligands

H2O2-Reactivity of Copper(II) Complexes Supported by Tris[(pyridin-2-yl)methyl]amine Ligands with 6-Phenyl Substituents

2008 ◽  
Vol 47 (24) ◽  
pp. 12032-12039 ◽  
Author(s):  
Atsushi Kunishita ◽  
Minoru Kubo ◽  
Hirohito Ishimaru ◽  
Takashi Ogura ◽  
Hideki Sugimoto ◽  
...  
Keyword(s):  
Methyl Amine ◽  
Amine Ligands

First Row Divalent Transition Metal Complexes of Aryl-Appended Tris((pyridyl)methyl)amine Ligands:  Syntheses, Structures, Electrochemistry, and Hydroxamate Binding Properties

2003 ◽  
Vol 42 (23) ◽  
pp. 7472-7488 ◽  
Author(s):  
Magdalena M. Makowska-Grzyska ◽  
Ewa Szajna ◽  
Crystal Shipley ◽  
Atta M. Arif ◽  
Michael H. Mitchell ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Binding Properties ◽  
Methyl Amine ◽  
Amine Ligands

Zinkkomplexe kettenförmiger N3-Chelatliganden / Zinc Complexes of Chain-Like N3 Chelate Ligands

1992 ◽  
Vol 47 (7) ◽  
pp. 962-968 ◽  
Author(s):  
Joachim Wirbser ◽  
Heinrich Vahrenkamp
Keyword(s):  
Crystal Structures ◽  
Zinc Complexes ◽  
Spectroscopic Evidence ◽  
Methyl Amine ◽  
Trigonal Bipyramidal ◽  
Chelate Ligands ◽  
Zinc Salts

The title ligands bis[(2-pyridyl)methyl]amine (BPA) and bis[(2-benzimidazolyl)methyl]-methylamine (BBMA) were used to prepare complexes with zinc salts. 1:1 complexes of BPA with ZnCl2, ZnBr2, ZnI2, Zn(SCN)2, Zn(CH3COO)2, and Zn(NO3)2 as well as of BBMA with ZnCl2, ZnBr2, and Zn(NO3)2 were obtained. Spectroscopic evidence indicates that all these complexes are five-coordinate molecular LZnX2 units. With Zn(ClO4)2, BPA forms a 2:1 complex presumed to be an octahedral ionic L2ZnX2 species. The crystal structures of BPA · ZnCl2 and BBMA · ZnBr2 reveal distorted square pyramidal resp. trigonal bipyramidal molecular geometries.

scholarly journals Synthesis, structures, and catalytic efficiency in ring opening polymerization of rac-lactide with tridentate vs. bidentate cobalt(ii), zinc(ii), and cadmium(ii) complexes containing N-substituted N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)amine ligands

RSC Advances ◽  
2021 ◽  
Vol 11 (31) ◽  
pp. 18840-18851
Author(s):  
Solhye Choe ◽  
Hyosun Lee ◽  
Saira Nayab
Keyword(s):  
Ring Opening ◽  
Catalytic Efficiency ◽  
Ring Opening Polymerization ◽  
Methyl Amine ◽  
Amine Ligands

Co(ii), Zn(ii), and Cd(ii) complexes supported by bis-pyrazolyl ligands were applied to the ring-opening polymerization of rac-lactide to produce heterotactic polylactides (PLAs) with superior heterotactic bias i.e. Pr up to 0.94 at −25 °C.

scholarly journals Crystal structure ofcatena-poly[[silver(I)-μ-N-(pyridin-2-ylmethyl)pyridine-3-amine-κ2N:N′] trifluoromethanesulfonate]

2014 ◽  
Vol 70 (11) ◽  
pp. 389-391 ◽  
Author(s):  
Suk-Hee Moon ◽  
Seonghwa Cho ◽  
Ki-Min Park
Keyword(s):  
Axial Direction ◽  
Helical Chain ◽  
Supramolecular Network ◽  
Stacking Interactions ◽  
Coordination Geometry ◽  
Left Handed ◽  
Hydrogen Bonding Interactions ◽  
Amine Ligands ◽  
The Right ◽  
Linear Coordination

In the asymmetric unit of the title compound, {[Ag(C11H11N3)]CF3SO3}n, there are two AgIatoms, twoN-(pyridine-2-ylmethyl)pyridine-3-amine ligands (AandB) and two CF3SO3−anions. Both AgIatoms are bridged by two pyridine N atoms from two symmetry-relatedAorBligands, forming right- or left-handed helical chains, respectively. The AgIatom of the right-handed helical chain adopts a slightly distorted linear coordination geometry [N—Ag—N = 170.69 (14)°], while that of the left-handed helical chain adopts a bent geometry [N—Ag—N = 149.42 (14)°]. Both helical chains have the same pitch length [10.8437 (5) Å], propagate along theb-axial direction and are alternately arrangedviaAg...Ag [3.0814 (5) Å] and π–π stacking interactions [centroid–centroid distances = 3.514 (3) and 3.487 (3) Å], resulting in the formation of a two-dimensional supramolecular network extending parallel to theabplane. Weak Ag...O [2.861 (4), 2.617 (3), and 2.624 (4) Å] and Ag...F [3.017 (3) Å] interactions as well as N—H...O and C—H...O, C—H...N and C—H...F hydrogen-bonding interactions occur between the helical chains and the anions.

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