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Aldehydes are named based on the systematic nomenclature rules set by the IUPAC. For acyclic aldehydes, the longest carbon chain containing the aldehydic (–CHO) group is considered the parent chain. The aldehyde is named by replacing the last letter “e” in the hydrocarbon name with “al”. For instance, a simple, seven-carbon-membered acyclic aldehyde is called heptanal, derived from heptane. The carbon chain is numbered starting from the aldehydic carbon, although the aldehydic carbon’s locant...
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Updated: Jun 1, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
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Published on: November 22, 2016

Bis(phenyl-phospho-nic) anhydride.

Yang Li1, Guoxiong Hua, Alexandra M Z Slawin

  • 1Department of Chemistry, University of St Andrews, Fife KY16 9ST, Scotland.

Acta Crystallographica. Section E, Structure Reports Online
|May 18, 2011
PubMed
Summary
This summary is machine-generated.

This study reveals how four independent molecules of C(12)H(12)O(5)P(2) form dimers through hydrogen bonds. These dimers create specific ring structures, influencing molecular arrangements.

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Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants
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Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants
12:06

Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants

Published on: October 19, 2017

Area of Science:

  • Crystallography
  • Supramolecular Chemistry
  • Organic Chemistry

Background:

  • Understanding molecular self-assembly is crucial in supramolecular chemistry.
  • Hydrogen bonding plays a key role in organizing molecular structures.
  • The compound C(12)H(12)O(5)P(2) presents an interesting case for studying intermolecular interactions.

Purpose of the Study:

  • To elucidate the crystal structure of C(12)H(12)O(5)P(2).
  • To investigate the role of hydrogen bonding in the formation of dimers.
  • To analyze the conformational preferences of the aryl rings within the crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of intermolecular interactions, specifically O-H⋯O hydrogen bonds, was performed.
  • Dihedral angles between aryl rings were measured to assess molecular conformation.

Main Results:

  • The asymmetric unit contains four independent molecules of C(12)H(12)O(5)P(2).
  • Two dimers are formed through pairs of intermolecular O-H⋯O hydrogen bonds, creating characteristic R(2)(2)(8) rings.
  • Significant variations in dihedral angles between aryl rings were observed across the four molecules, indicating conformational flexibility.

Conclusions:

  • The crystal structure of C(12)H(12)O(5)P(2) is characterized by dimer formation driven by hydrogen bonding.
  • The observed R(2)(2)(8) ring motifs are a direct consequence of these intermolecular interactions.
  • The conformational diversity of the aryl rings highlights the compound's adaptability in solid-state packing.