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Showing 1 to 20 of 77 for “"tridentate"”.
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Unsymmetrical tridentate phosphine ligands
… central chiral phosphorus atom. The ttparent" tridentate phosphine is (2- diphenylphosphinoethyl)(3-diphenylphosphinopropyl) phenylphosphine, Ph2P(CH2)3PPh(CH2)2PPh2, "eptp". Other tridentates were prepared by varying the substituents at one phosphorus atom to form the analogous ligands with a …
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Synthetic Routes to 3-Fold Symmetric Tridentate Oxygen Donor Ligands
The class of ligands represented by [CpCo(P(O)(OR)2)3]-, L- , were first synthesized by W. Kläui in 1977. These ligands have been found to coordinate to a variety of low and high oxidation state metals through the use of its three P=O oxygen atoms as donors. The ligands act as mono-anionic six …
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Synthesis and characterization of group IV metal complexes featuring tridentate diamidoamine ligands
… zirconium and titanium complexes featuring tridentate diamidoamine ligands were developed. Zirconium dichloride complexes, [(Mes)N(CH2)2NR(CH 2)2N(Mes)]ZrCl2 (R=H, SiMe3), were synthesized via a one step toluene elimination reaction. Analogous titanium dichloride complexes, …
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Platinum Complexes With Tridentate Ligands as Models for Active Monofunctional Anticancer Drugs
… of in-plane bulk of Pt(Ltri)G adducts (Ltri = tridentate carrier ligand, G = guanine derivative bound to a metal, but not tethered to another nucleobase). NMR spectroscopy provided conclusive evidence that Pt(Ltri)G (Ltri = di-(2-picolyl)amine (N(H)dpa), …
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Synthesis, characterization, biological and catalytic studies of tridentate monothiosemicarbazone palladium (II) complexes
… with precursors of type Pd(L)2CI2 yielding eight tridentate thiosemicarbazone Pd(II) complexes with general formula [Pd( 3-0,N,Sthiosemicarbazone)(L)] (L = PPh3 or 4-picoline). Six of these complexes are new compounds and were fully characterized using NMR and IR spectroscopies, mass spectrometry …
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Group 4 complexes containing tridentate diamido donor ligands : organometallic chemistry and catalysis
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Early transition metal complexes containing tridentate amido ligands : a systematic approach to Ziegler-Natta catalysis
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Reactivity, Characterization, Equilibrium Thermodynamics and Hetero-bimetallic Studies of Tridentate and Tetradentate Complexes Relevant to Syngas Catalysis
The unifying objective of this work is the study of model systems that will assist in the development of new metal catalysts capable of converting carbon monoxide and hydrogen (syngas) into organic oxygenates at mild temperature and pressure. The selective catalytic transformation of carbon …
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High and low valent nickel complexes supported by tridentate and tetradentate ligands relevant for C–C bond formation reactions
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Design, Synthesis and Spectroscopy of Highly Absorptive Chromophores Based on the Bis(tridentate)metal-ethyne-(porphinato)metal Molecular Framework for Solar Energy Conversion
… absorptive chromophoric systems based on the bis(tridentate)metal-ethyne-(porphinato)metal molecular framework are introduced and discussed. Apart from the substantially more intense absorption in the solar spectral range comparing to traditional photosensitizers, each chromophoric system …
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Tuning the ground and excited state properties of a series of polymetallic tridentate complexes incorporating Ru(II) or Os(II) as the chromophore
… and polymetallic complexes incorporating the tridentate polypyridyl bridging ligand tpp (where tpp = 2,3,5,6-tetrakis(2-pyridyl)pyrazine) and an investigation of their ground and excited state properties. A series of ruthenium monometallic chromophore complexes has been prepared varying the …
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Oxyligands in triosmium carbonyl cluster compounds
Tridentate triply bridging phosphonate and arsonate clusters of the general formula ($\mu$-H)$\sb2$Os$\sb3$(CO)$\sb9$($\mu\sb3$, $\eta\sp3$-O$\sb3$ER) (E = P, R = Ph (1), Me; E = As, R = Ph) were prepared. The reaction scheme involved (1) generation of a solution containing a labile cluster species …
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Synthesis of cyclometalated gold (III) complexesfunctionalized by alkynyl derivatives. Study of the interaction with DNA secondary structures.
… structures. In this work, bidentate and tridentate ligands, in particular derived from both phenylpyridine and diphenylpyridine, respectively, have been employed as framework structure in order to stabilize the studied gold complexes. Chapter 1 studies the synthesis of cyclometalated …
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Syntheses and Reactions of Novel Bicyclic Aryldialkoxybrominane and Aryldialkoxyiodinane Oxide
… precursor for the incorporation of a stabilizing tridentate ligand in compounds of hypervalent nonmetallic elements.
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Mono- and multinuclear PGM complexes containing thiosemicarbazones synthesis, characterization and antiplasmodial evaluation
… ligands chelate in either a bidentate (N,S) or tridentate (C,N,S) mode.
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The Synthesis and Characterization Of A Functionalized Diethylenetriamine Rhenium Complex Followed By Analytical Analysis of Novel Rhenium-Luteinizing Hormone-Releasing Hormone Conjugates
… [99mTc(CO)3L]+ core, when facially chelated by tridentate ligands, shows superior pharmacokinetics and stability. Given the nuclear characteristics of 99mTc, studying these complexes is complicated. Here we use non-radioactive rhenium (Re) in [Re(CO)3L]+ analogues to serve as safer models for …
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"Low-valent early transition metal complexes stabilized by the chelating tripod phosphine ligand ( t-butyl)tris((dimethylphosphino)methyl);silane (""trimpsi"")"
… has been extended through the use of a new tridentate phosphine ligand, Bu$\sp{\rm t}$Si(CH$\sb2$PMe$\sb2$)$\sb3$, or ""trimpsi"". The starting materials (trimpsi)TiCl$\sb3$(thf), (trimpsi)VCl$\sb3$(thf), (trimpsi)CrCl$\sb3$, and (trimpsi)ZrCl$\sb4$(dme) have been used to prepare new …
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Earth-Abundant Metal Complexes Binding N-Heterocyclic Carbene-Based Ligands for the Photocatalytic Carbon Dioxide Reduction Reaction
… synthesized a series of Ni(II) complexes bearing tridentate CNC pincer ligand scaffold composed of two imidazole or benzimidazole-derived NHC rings and a pyridyl ring with various remote substituents (OMe, Me, H) para to the pyridine ring. A monodentate chloride ligand was also incorporated into …
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The Kinetic Resolution of Secondary Alcohols Through A Tandem Enantioselective Silylation and the Synthesis of Bis(Oxazolidinyl)Pyridine Metal-Organic Complexes
… available cis amino indanol. Our C2 ligand shows tridentate binding to give 5 coordinate distorted trigonal pyramidal solid state structures with zinc, copper and cadmium chlorides. The bis(oxazolidinyl)pyridine ligand exhibits sufficient flexibility to give both cis and trans tridentate …
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