PCB replacements in dielectric fluid

Addison, R.F.

doi:10.1021/es00116a715

Cited by 7 publications

(3 citation statements)

References 44 publications

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“…These include polydimethylsiloxanes (silicones), high molecular weight hydrocarbons based on mineral oils, synthetic polyol esters usually based on trimethylolpropane or pentaerythritol, and poly(alpha)olefins. 41,42 Typical structures are given in Figure 4. Silicones are essentially nonbiodegradable and mineral oils, being complex mixtures of cyclic and noncyclic hydrocarbons some of which are readily degradable and some not, have limited biodegradability in standard tests.…”

Section: Vegetable Oil-based Functional Fluidsmentioning

confidence: 99%

Designing Small Molecules for Biodegradability

2007

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Section: Vegetable Oil-based Functional Fluidsmentioning

confidence: 99%

Designing Small Molecules for Biodegradability

2007

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“…For background to diisopropylnaphthalenes, see: Addison (1983); Brzozowski et al (2001); Collin et al (2003).…”

Section: Related Literaturementioning

confidence: 99%

1,3-Bis(propan-2-yl)naphthalene

2011

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In the title compound, C16H20, one of the isopropyl groups shows almost equal displacements [1.252 (1) and −1.270 (1) Å] of its methyl-C atoms from the mean plane of the naphthalene ring system, while the other shows asymmetric displacements [1.586 (2) and −0.315 (1) Å]. In the crystal, the molecules are linked into sheets lying in the ab plane by three C—H⋯π contacts, two involving donors belonging to the isopropyl groups and the third a donor atom from the naphthalene ring system. The different orientations of the isopropyl groups might be attributed to the fact that the C—H⋯π interaction involving one of them is enhanced by the C—H⋯π interaction involving the aromatic ring.

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“…Halogenated organics are invaluable compounds with central importance in synthetic chemistry as solvents, carbon–carbon and carbon–nitrogen coupling reagents, and as protecting groups. [1] They offer diverse real‐world applications as coolants, [2] dielectric fluids (e. g., in transformers), [3] agrochemicals, [4] and pharmaceuticals. [5] In general, the incorporation of halogen atoms into organic compounds profoundly increases both their chemical and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

A Convenient and Stable Heterogeneous Nickel Catalyst for Hydrodehalogenation of Aryl Halides Using Molecular Hydrogen

et al. 2022

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Hydrodehalogenation is an effective strategy for transforming persistent and potentially toxic organohalides into their more benign congeners. Common methods utilize Pd/C or Raney‐nickel as catalysts, which are either expensive or have safety concerns. In this study, a nickel‐based catalyst supported on titania (Ni‐phen@TiO2‐800) is used as a safe alternative to pyrophoric Raney‐nickel. The catalyst is prepared in a straightforward fashion by deposition of nickel(II)/1,10‐phenanthroline on titania, followed by pyrolysis. The catalytic material, which was characterized by SEM, TEM, XRD, and XPS, consists of nickel nanoparticles covered with N‐doped carbon layers. By using design of experiments (DoE), this nanostructured catalyst is found to be proficient for the facile and selective hydrodehalogenation of a diverse range of substrates bearing C−I, C−Br, or C−Cl bonds (>30 examples). The practicality of this catalyst system is demonstrated by the dehalogenation of environmentally hazardous and polyhalogenated substrates atrazine, tetrabromobisphenol A, tetrachlorobenzene, and a polybrominated diphenyl ether (PBDE).

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PCB replacements in dielectric fluid

Cited by 7 publications

References 44 publications

Designing Small Molecules for Biodegradability

Designing Small Molecules for Biodegradability

1,3-Bis(propan-2-yl)naphthalene

A Convenient and Stable Heterogeneous Nickel Catalyst for Hydrodehalogenation of Aryl Halides Using Molecular Hydrogen

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