The civilian, commercial, and defense sectors of most advanced industrialized nations are faced with a tremendous set of environmental problems related to the remediation of hazardous wastes, contaminated groundwaters, and the control of toxic air contaminants. For example, the slow pace of hazardous waste remediation at military installations around the world is causing a serious delay in conversion of many of these facilities to civilian uses. Over the last 10 years problems related to hazardous waste remediation have emerged as a high national and international priority.

Environmental Applications of Semiconductor Photocatalysis

The Cationminus signpi Interaction.

C–H activation has surfaced as an increasingly powerful tool for molecular sciences, with notable applications to material sciences, crop protection, drug discovery, and pharmaceutical industries, among others. Despite major advances, the vast majority of these C–H functionalizations required precious 4d or 5d transition metal catalysts. Given the cost-effective and sustainable nature of earth-abundant first row transition metals, the development of less toxic, inexpensive 3d metal catalysts for C–H activation has gained considerable recent momentum as a significantly more environmentally-benign and economically-attractive alternative. Herein, we provide a comprehensive overview on first row transition metal catalysts for C–H activation until summer 2018.

3d Transition Metals for C-H Activation.

Free Radical Lipid Peroxidation: Mechanisms and Analysis

Catalytic activities of Schiff base transition metal complexes

Remarkable Transformation of 2,4,6-Tri-tert-butyl-1,3,5-triphosphabenzene into the 2,4,5-Tri-tert-butyl-1,3-diphosphacyclopentadienide Anion

Hexa-phosphorus analogues of metallocenes: synthesis of the first paramagnetic sandwich complex containing two η51,2,4-triphosphacyclopentadienyl rings. Crystal and molecular structures of [Cr(η5-C2But2P3)2]

Author(s): Zhang, Yun; Tham, Fook S; Nixon, John F; Taylor, Charlotte; Green, Jennifer C; Reed, Christopher A | Abstract: (Figure Presented) Strong yet gentle: Where triflate reagents fail, carborane-based sources of H+, CH3+, and [R3Si]+ electrophiles add to phosphabenzenes preferentially at the P atom rather than C (see picture). © 2008 Wiley-VCH Verlag GmbH a Co. KGaA.

/pdf/the-low-basicity-of-phosphabenzenes-first-examples-of-4byujw8nob.pdf

The low basicity of phosphabenzenes: first examples of protonation, alkylation, and silylation reactions.

Publisher Summary This chapter presents a review on trifluorophosphine complexes of transition metals, based on the materials prior to early 1984. This chapter discusses the synthetic, structural, and spectroscopic aspects of an extensive range of transition metal phosphine (PF 3 ) complexes including a wide variety of organometallic derivatives. PF 3 can stabilize novel systems which have no precedent with other phosphine ligands. The presence of 31 P and 19 F nuclei offers nuclear magnetic resonance (NMR) spectroscopic advantages in structural assignments and in the study of inter- and intramolecular ligand-exchange processes. The first zero-valent binary transition metal-trifluorophosphine complex to be reported was [Ni(PF 3 ) 4 ]. The trifluorophosphine metal hydrido compounds are usually highly acidic and can readily form metallate ions. Transition metal carbonyl complexes can be suitable precursors—for example, treatment of hydrido complexes or their alkali salts with PF 3 under UV irradiation followed if necessary by acidification of the reaction mixture. Various physical evidence suggests that PF and CO are very similar in their behavior toward transition metals. Anionic halogeno complexes are usually obtained by addition of either tetraalkylammonium or tetraphenylarsonium halides to a dinuclear halogeno-bridged metal—PF 3 complex or, alternatively, by simple addition of PF 3 to dinuclear halogenobridged anions.

John F. Nixon

Papers

Remarkable Transformation of 2,4,6-Tri-tert-butyl-1,3,5-triphosphabenzene into the 2,4,5-Tri-tert-butyl-1,3-diphosphacyclopentadienide Anion

Hexa-phosphorus analogues of metallocenes: synthesis of the first paramagnetic sandwich complex containing two η51,2,4-triphosphacyclopentadienyl rings. Crystal and molecular structures of [Cr(η5-C2But2P3)2]

The low basicity of phosphabenzenes: first examples of protonation, alkylation, and silylation reactions.

Trifluorophosphine Complexes of Transition Metals

Tetraphosphatricyclo[4.2.0.02, 5]octadiene, neue Phosphaalkin‐Cyclotetramere; intermediäres Auftreten von λ3σ2‐Diphospheten