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Synthesis and structure of complexes of phosphorus pentachloride with 4-dimethylaminopyridine and n-methylimidazole

✍ Scribed by Sergey E. Pipko; Ludmila V. Bezgubenko; Anatoliy D. Sinitsa; Eduard B. Rusanov; Evgeniy G. Kapustin; Mark I. Povolotskii; Volodymyr V. Shvadchak

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
258 KB
Volume
19
Category
Article
ISSN
1042-7163

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✦ Synopsis

Abstract

Complexes of phosphorus pentachloride with 4‐dimethylaminopyridine and N‐methylimidazole were synthesized. The molecular structure of the phosphorus pentachloride complex with N‐methylimidazole was determined by single‐crystal X‐ray diffraction. In the cationic part of the complex, the phosphorus atom possesses four PCl bonds within the range 2.109–2.148 Å and two cis‐P–N bonds (1.811 and 1.832 Å) with N‐methylimidazole and exhibits slightly distorted octahedral coordination with angles at phosphorus atom in the range 87.57°–91.50°. The relative stability of the cis and trans conformations of the complex was studied by DFT calculations. The chemical properties and reactivity of the compounds obtained are determined; their utility as condensing agents in the synthesis of amides from acids and amines was shown. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:171–177, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20392

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