Einige neue kristallisierte 7.7.8.8-Tetracyanochinondimethan(TCNQ)-Verbindungen mit Tetramminplatin(II)-Dikationen als Gegenionen.

New compounds of stoichiometry [Pt(II)L2](TCNQ)2, [Pt(II)L2](TCNQ)3 and [Pt(II)L2](TCNQ)4 (with L = one bidentate or two monodentate neutral nitrogen donor ligands like ethylenediamine (en), 1,10-phenanthroline (phen) or ammonia) have been prepared and characterized. The complexes of stoichiometry [Pt(II)L2](TCNQ)2 with only negatively charged TCNQ- units have relatively low conductivities (in the range of 10-7—10-8 Ω-1 cm-1) while the compounds [Pt(II)L2](TCNQ)3 containing one neutral TCNQ molecule per formula unit (“complex TCNQ-salts”) conduct much better (in the range of 10-2—10-3 [Ω-1 · cm-1] for pellets). Most of them show appreciable deviations from a Curie law behaviour. A sharp transition from an antiferromagnetic low temperature to a paramagnetic high temperature modification can be observed for [Pt(II)dipy2](TCNQ)2 (dipy = 2,2′-dipyridyl) at 87°C.

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The Evolution of Catalysis for Alkyd Coatings: Responding to Impending Cobalt Reclassification with Very Active Iron and Manganese Catalysts, Using Polydentate Nitrogen Donor Ligands

Catalysts ◽

10.3390/catal9100825 ◽

2019 ◽

Vol 9 (10) ◽

pp. 825 ◽

Cited By ~ 3

Author(s):

Simpson ◽

Maaijen ◽

Roelofsen ◽

Hage

Keyword(s):

Active Species ◽

Donor Ligands ◽

Nitrogen Donor Ligands ◽

Metal Centers ◽

Alkyd Resins ◽

Human Contact ◽

Unique Reaction ◽

Nitrogen Donor ◽

Metal Soaps ◽

New Compounds

Autoxidation processes to achieve curing of alkyd resins in paints, inks, and coatings are ubiquitous in many applications. Cobalt soaps have been employed for these applications for many decades and most of the paint and ink alkyd resin formulations have been optimized to achieve optimal benefits of the cobalt soaps. However, cobalt soaps are under increased scrutiny because of likely reclassification as carcinogenic under REACH (Registration, Evaluation, Authorisation, and Restrictions of Chemicals) legislation in Europe. This is critical, since such coatings are available for regular human contact. Alternative manganese- and iron-based siccatives have been developed to address this need for over a decade. They often show very high curing activity depending on the organic ligands bound to the metal centers. Recently, new classes of catalysts and modes of application have been published or patented to create safe paints, whilst delivering performance benefits via their unique reaction mechanisms. Besides the use of well-defined, preformed catalysts, paint formulations have also been developed with mixtures of metal soaps and ligands that form active species in-situ. The change from Co-soaps to Mn- and Fe-based siccatives meant that important coating issues related to radical-based curing, such as skinning, had to be rethought. In this paper we will review the new catalyst technologies and their performance and modes of action, as well as new compounds developed to provide anti-skinning benefits.

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The role of zero-field splitting and π-stacking interaction of different nitrogen-donor ligands on the optical properties of luminescent rhenium tricarbonyl complexes

New Journal of Chemistry ◽

10.1039/d1nj01544c ◽

2021 ◽

Author(s):

Plinio Cantero-López ◽

Yoan Hidalgo-Rosa ◽

Zoraida Sandoval-Olivares ◽

Julián Santoyo-Flores ◽

Pablo Mella ◽

...

Keyword(s):

Excited States ◽

Coordination Compounds ◽

Donor Ligands ◽

Zero Field ◽

Zero Field Splitting ◽

Nitrogen Donor Ligands ◽

Nitrogen Donor ◽

Π Stacking Interaction ◽

Rhenium Tricarbonyl

Rhenium tricarbonyl complexes are one of the most important classes of coordination compounds in inorganic chemistry. Exploring their luminescent excited states, lowest singlet (S1), and the lowest triplet (T1), is...

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New Synthetic Routes Toward Enantiopure Nitrogen Donor Ligands.

ChemInform ◽

10.1002/chin.200715098 ◽

2007 ◽

Vol 38 (15) ◽

Author(s):

Xavier Sala ◽

Anna M. Rodriguez ◽

Montserrat Rodriguez ◽

Isabel Romero ◽

Teodor Parella ◽

...

Keyword(s):

Donor Ligands ◽

Nitrogen Donor Ligands ◽

Nitrogen Donor ◽

Synthetic Routes

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Oxidative Degradation of Toxic Organic Pollutants by Water Soluble Nonheme Iron(IV)-Oxo Complexes of Polydentate Nitrogen Donor Ligands

Dalton Transactions ◽

10.1039/d0dt04421k ◽

2021 ◽

Author(s):

Sandip Munshi ◽

Rahul Dev Jana ◽

Tapan Kanti Paine

Keyword(s):

Organic Pollutants ◽

Oxidative Degradation ◽

Heme Iron ◽

Water Soluble ◽

Donor Ligands ◽

Nitrogen Donor Ligands ◽

Polydentate Ligands ◽

Oxo Complexes ◽

Non Heme Iron ◽

Nitrogen Donor

The ability of four mononuclear non-heme iron(IV)-oxo complexes supported by nitrogen donor polydentate ligands in degrading organic pollutants has been investigated. The water soluble iron(II) complexes upon treatment with ceric...

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