1. Introduction of selenium and tellurium into reaction systems
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Risto S. Laitinen
Abstract
The introduction of selenium and tellurium into both organic and inorganic compounds frequently begins with the elements. This chapter provides an overview of the main reactivity of the hexagonal allotropes of selenium and tellurium, which are the most stable form of the elements under ambient conditions. While the two elements have very similar chemical properties, there are also notable differences. Upon reduction, both elements form mono- and poly-chalcogenides, which are useful nucleophilic reagents in several reactions. The elements also react with many main group compounds as well as with transition metal complexes. They also form homopolyatomic cations upon oxidation. Both selenium and tellurium react with Grignard reagents and organyllithium compounds affording organylchalcogenolates, which upon oxidation form dichalcogenides that are themselves useful reagents in organic synthetic chemistry as well as in materials applications. This chapter provides a short introduction to the various topics that will be developed further in the subsequent chapters of this book.
Abstract
The introduction of selenium and tellurium into both organic and inorganic compounds frequently begins with the elements. This chapter provides an overview of the main reactivity of the hexagonal allotropes of selenium and tellurium, which are the most stable form of the elements under ambient conditions. While the two elements have very similar chemical properties, there are also notable differences. Upon reduction, both elements form mono- and poly-chalcogenides, which are useful nucleophilic reagents in several reactions. The elements also react with many main group compounds as well as with transition metal complexes. They also form homopolyatomic cations upon oxidation. Both selenium and tellurium react with Grignard reagents and organyllithium compounds affording organylchalcogenolates, which upon oxidation form dichalcogenides that are themselves useful reagents in organic synthetic chemistry as well as in materials applications. This chapter provides a short introduction to the various topics that will be developed further in the subsequent chapters of this book.
Kapitel in diesem Buch
- Frontmatter I
- Preface V
- Contents VII
- List of contributing authors XIII
- 1. Introduction of selenium and tellurium into reaction systems 1
- 2. Selenium– and tellurium–halogen reagents 27
- 3. Organoselenium and organotellurium compounds containing chalcogen-oxygen bonds in organic synthesis or related processes 61
- 4. Selenium– and tellurium–nitrogen reagents 123
- 5. Organophosphorus-selenium/tellurium reagents: from synthesis to applications 151
- 6. Synthesis and coordination chemistry of cyclic seleno- and telluroureas 207
- 7. Selenium and Tellurium Electrophiles in Organic Synthesis 243
- 8. Reagents that Contain Se-H or Te-H Bonds 301
- 9. Zinc-Selenium reagents in organic synthesis 315
- 10. Recent advances in the self-assembly of polynuclear metal–selenium and –tellurium compounds from 14–16 reagents 331
- 11. Applications of metal selenium/tellurium compounds in materials science 383
- Formula Index of Selenium and Tellurium Reactants 445
Kapitel in diesem Buch
- Frontmatter I
- Preface V
- Contents VII
- List of contributing authors XIII
- 1. Introduction of selenium and tellurium into reaction systems 1
- 2. Selenium– and tellurium–halogen reagents 27
- 3. Organoselenium and organotellurium compounds containing chalcogen-oxygen bonds in organic synthesis or related processes 61
- 4. Selenium– and tellurium–nitrogen reagents 123
- 5. Organophosphorus-selenium/tellurium reagents: from synthesis to applications 151
- 6. Synthesis and coordination chemistry of cyclic seleno- and telluroureas 207
- 7. Selenium and Tellurium Electrophiles in Organic Synthesis 243
- 8. Reagents that Contain Se-H or Te-H Bonds 301
- 9. Zinc-Selenium reagents in organic synthesis 315
- 10. Recent advances in the self-assembly of polynuclear metal–selenium and –tellurium compounds from 14–16 reagents 331
- 11. Applications of metal selenium/tellurium compounds in materials science 383
- Formula Index of Selenium and Tellurium Reactants 445
