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

Synthesis and Characterization of a Phosphaalkyne-Bridged Pentairon Carbonyl Cluster. Crystal and Molecular Structure of [{Fe3Se2(CO)8}(.mu.-PCBut){Fe2Se(CO)6}]

The reaction of tBuCP with CS2 (or its ylide type complexes such as R3PCS2 (R = Et, Ph, cyclohexyl), (C5H10N)2CCS2, or (C4H8NO)2CCS2) gives a mixture of 3,5-di-tert-butyl-1-thia-2,4-diphosphole and 2,5-di-tert-butyl-1-thia-3,4-diphosphole, which were characterized by NMR spectroscopy. The latter was also characterized by the single-crystal X-ray structure determination of its bis(platinum(II)) complex [(PtCl2PEt3)2(μ-P2SC2tBu2)]. This is the first structural characterization of a 1-thia-3,4-diphosphole ring. The mechanism of these reactions was explored by B3LYP/6-311+G** level quantum chemical calculations. The reaction pathway involves a phosphadithiolediylcarbene and its diphosphatetrathiafulvalene dimer as intermediates. Several other possible reaction pathways were ruled out.

Syntheses and Theoretical and Mechanistic Aspects of 1-Thia-2,4- and 1-Thia-3,4-diphosphole Formed from CS2 and tBuCP and Crystal and Molecular Structure of the First 1-Thia-3,4-diphosphole Complex: cis-[{PtCl2(PEt3)}2(P2SC2tBu2)]

Synthesis and structural characterisation of the first hexaphosphastrontocene [Sr(η5-P3C2But2)2] and its pyrazine adduct

The synthesis of the first mononuclear η2(4e)-bonded phosphaalkyne complex 1 is described, the 31P and 13C NMR spectra showing the expected low field contact resonances; reaction of 1 with a molecule of ButCP leads to the formation of an η4-1,3-diphosphacyclobutadiene complex, thus demonstrating the stepwise nature of the formation of the P2C2 ring.

Synthesis of a mononuclear 2(4e)-bonded phosphaalkyne complex, transformation into an 4-1,3-diphosphacyciobutadiene complex

Erste Beispiele für Komplexe mit η1-gebundenen Phosphaalkinen – Synthese sowie Kristall- und Molekülstruktur vontrans-[Mo(AdCP)2(Et2PCH2CH2PEt2)2] (Ad Adamantyl)

John F. Nixon

Papers

Synthesis and Characterization of a Phosphaalkyne-Bridged Pentairon Carbonyl Cluster. Crystal and Molecular Structure of [{Fe3Se2(CO)8}(.mu.-PCBut){Fe2Se(CO)6}]

Syntheses and Theoretical and Mechanistic Aspects of 1-Thia-2,4- and 1-Thia-3,4-diphosphole Formed from CS2 and tBuCP and Crystal and Molecular Structure of the First 1-Thia-3,4-diphosphole Complex: cis-[{PtCl2(PEt3)}2(P2SC2tBu2)]

Synthesis and structural characterisation of the first hexaphosphastrontocene [Sr(η5-P3C2But2)2] and its pyrazine adduct

Synthesis of a mononuclear 2(4e)-bonded phosphaalkyne complex, transformation into an 4-1,3-diphosphacyciobutadiene complex

Erste Beispiele für Komplexe mit η1-gebundenen Phosphaalkinen – Synthese sowie Kristall- und Molekülstruktur vontrans-[Mo(AdCP)2(Et2PCH2CH2PEt2)2] (Ad Adamantyl)