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Updated: May 27, 2026

Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts
Published on: February 24, 2015
N,N-Bis(diphenyl-phosphan-yl)cyclo-butanamine
Ilana Engelbrecht1, Hendrik G Visser, Andreas Roodt
1Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa.
This study details the molecular geometry of a novel phosphorus-nitrogen compound, C(28)H(27)NP(2). Researchers observed unique bonding and intermolecular interactions, revealing a distorted trigonal-pyramidal structure around nitrogen and phosphorus atoms.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Supramolecular Chemistry
Background:
- Understanding the coordination chemistry of phosphorus and nitrogen is crucial for developing new materials.
- The synthesis and structural characterization of novel organophosphorus compounds provide insights into chemical bonding and reactivity.
- Investigating intermolecular interactions is key to predicting and controlling crystal packing and material properties.
Purpose of the Study:
- To elucidate the detailed molecular structure and bonding characteristics of the title compound, C(28)H(27)NP(2).
- To analyze the coordination geometry around the nitrogen and phosphorus atoms.
- To identify and describe intra- and intermolecular interactions within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the three-dimensional structure of the compound.
- Analysis of bond lengths, bond angles, and geometric parameters provided insights into the electronic environment.
- Identification of hydrogen bonds and other non-covalent interactions was performed.
Main Results:
- The nitrogen atom exhibited an almost planar geometry with attached P and C atoms (0.066(2) Å deviation).
- Distorted trigonal-pyramidal geometries were observed around the nitrogen and phosphorus atoms, indicated by specific bond angles.
- An intramolecular C-H⋯P hydrogen bond and intermolecular C-H⋯π interactions were identified, forming a supramolecular network.
Conclusions:
- The compound C(28)H(27)NP(2) displays unique coordination geometries at the N and P centers.
- Intramolecular and intermolecular interactions play a significant role in the crystal structure.
- The findings contribute to the understanding of bonding in organophosphorus-nitrogen systems.
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