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Phosphodiester Linkages01:01

Phosphodiester Linkages

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Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
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In 1896, the German chemist Paul Walden discovered that he could interconvert pure enantiomeric (+) and (-) malic acids through a series of reactions. This conversion suggested the involvement of optical inversion during the substitution reaction. Further, in 1930, Sir Christopher Ingold described for the first time two different forms of nucleophilic substitution reactions, which are known as SN1 (nucleophilic substitution unimolecular) and SN2 (nucleophilic substitution...
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The word “nucleophile” has a Greek root and translates to nucleus-loving. Nucleophiles are either negatively charged or neutral species with a pair of electrons in a high-energy occupied molecular orbital (HOMO). As these species tend to donate electron pairs, nucleophiles are considered Lewis bases as well. Negatively charged species, like OH−, Cl−, or HS−, with one or several pairs of electrons, are typically nucleophiles. Similarly, neutral species such as ammonia, amines, water, and alcohol...
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Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
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Nucleophilic phosphinidene complexes: access and applicability.

Halil Aktaş1, J Chris Slootweg, Koop Lammertsma

  • 1Department of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands.

Angewandte Chemie (International Ed. in English)
|February 17, 2010
PubMed
Summary
This summary is machine-generated.

This review covers nucleophilic phosphinidene complexes, focusing on tuning their electronic properties. It explores how ancillary ligands and metal centers influence the reactivity of these important phosphorus reagents.

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Area of Science:

  • Organometallic Chemistry
  • Main Group Chemistry

Background:

  • Nucleophilic phosphinidene complexes, represented as [L(n)M=P-R], are an emerging class of phosphorus reagents.
  • Understanding their synthesis, properties, and reactivity is crucial for advancing phosphorus chemistry.

Purpose of the Study:

  • To review the syntheses, properties, and reactivities of nucleophilic phosphinidene complexes.
  • To emphasize the electronic tuning of these phosphorus reagents through ligand and metal center modifications.
  • To address the differing applicability of stable 18-electron and transient 16-electron phosphinidenes.

Main Methods:

  • Literature review of existing research on phosphinidene complexes.
  • Analysis of electronic tuning strategies using ancillary ligands.
  • Comparison of coordinatively unsaturated transition-metal moieties.
  • Discussion of the properties of 18-electron versus 16-electron phosphinidenes.

Main Results:

  • Phosphinidene complexes can be electronically tuned by varying ancillary ligands and transition-metal centers.
  • Stable 18-electron and transient 16-electron phosphinidenes exhibit distinct applicability.
  • The electronic structure significantly impacts the reactivity and synthetic utility of these phosphorus compounds.

Conclusions:

  • Nucleophilic phosphinidene complexes offer versatile reactivity profiles.
  • Strategic electronic tuning is key to controlling their behavior.
  • Further exploration of 16-electron phosphinidenes may unlock new synthetic pathways.