Journal ArticleDOI
Aminoalkylferrocenyldichlorophosphanes: facile synthesis of versatile chiral starting materials
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TLDR
The aminoalkylferrocenyldichlorophosphanes can be used for the preparation of the corresponding primary phosphanes, one of which was characterised by X-ray crystallography and was also structurally characterised.Abstract:
A series of racemic and optically pure aminoalkylferrocenyldichlorophosphanes has been prepared by reaction of phosphorus trichloride with the corresponding lithiated aminoalkylferrocene precursors. Crystal structures of racemic 1-dichlorophosphanyl-2-N,N-dimethylaminomethylferrocene, racemic 1-dichlorophosphanyl-2-N,N-dimethylaminomethyl-3-triphenylsilylferrocene and (S)-N,N-dimethyl-1-[(R)-2-(dichlorophosphanyl)ferrocenyl]ethylamine reveal short intramolecular N⋯P distances, which are suggestive of weak N → P dative bonds. The aminoalkylferrocenyldichlorophosphanes can be used for the preparation of the corresponding primary phosphanes, one of which was characterised by X-ray crystallography. Optically pure (R)-N,N-dimethyl-1-[(S)-2-(phosphanyl)ferrocenyl]ethylamine can easily be lithiated twice to give the first enantiomerically pure lithium–phosphorus closo cluster compound, which was also structurally characterised.read more
Citations
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Journal ArticleDOI
The Bright Future of Unconventional σ/π-Hole Interactions
TL;DR: The physical nature of σ- and π-hole interactions is described, a selection of inquiries that utilise ρ- andπ-holes are presented, and an overview of analyses of structural databases (CSD/PDB) that demonstrate how prevalent these interactions already are in solid-state structures are given.
Journal ArticleDOI
The Pnicogen Bond: Its Relation to Hydrogen, Halogen, and Other Noncovalent Bonds
TL;DR: Although often observed in dimers in the gas phase, pnicogen bonds also serve as the glue in larger aggregates, and researchers have found them in a number of diffraction studies of crystals.
Journal ArticleDOI
Tetrel bond–σ-hole bond as a preliminary stage of the SN2 reaction
TL;DR: Calculations were carried out on complexes of ZH4, ZFH3 and ZF4 (Z = C, Si and Ge) molecules with HCN, LiCN and Cl(-) species acting as Lewis bases through nitrogen centre or chlorine ion, finding the electron charge redistribution is the same as that of the SN2 reaction.
Journal ArticleDOI
Pnicogen bonds: a new molecular linker?
TL;DR: In the past decades, unexpected strong chalcogen–chalcogen inter-actions or halogen bonds have captured interest as connec-tors.
Journal ArticleDOI
Detailed comparison of the pnicogen bond with chalcogen, halogen, and hydrogen bonds
TL;DR: In this article, the pnicogen bond is compared with its halogen and chalcogen bond cousins, as well as with the more common H-bond, and it is shown that the angular characteristics of the equilibrium geometry result primarily from a compromise between electrostatic and induction forces.
References
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P. van der Sluis,A. L. Spek +1 more
TL;DR: In this article, a method for least squares refinement of the atomic parameters of the ordered part of a crystal structure in the presence of disordered solvent areas is described, and the contribution of the observed contents to the total structure factor is calculated via a discrete Fourier transformation.
Book ChapterDOI
Structural and Bonding Patterns in Cluster Chemistry
TL;DR: In this paper, the borane-carborane structural pattern has been studied in a wide range of other compounds, including metal clusters, metal-hydrocarbon 7∼ complexes, and various neutral or charged hydrocarbons.
Journal ArticleDOI
NMR nomenclature. Nuclear spin properties and conventions for chemical shifts(IUPAC Recommendations 2001)
Robin K. Harris,Edwin D. Becker,Sonia Maria Cabral de Menezes,Robin J. Goodfellow,Pierre Granger +4 more
TL;DR: In this paper, a unified scale is recommended for reporting the NMR chemical shifts of all nuclei relative to the 1 H resonance of tetramethylsilane (TMS) in dilute solution (volume fraction, φ < 1%).