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Dibenzylamine substituted cyclotetraphosphazenes: Synthesis, characterization and their stereogenic properties by Semih Doğan; Ceylan Mutlu Balcı; Serap Beşli is a Chemistry article available to read on EtoBox.

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In this study, octachlorocyclotetraphosphazene, (1) and mono-spiro-1,3propanedioxycyclotetraphosphazene, (2) were reacted with dibenzylamine to obtain cyclotetraphosphazenes having one and two stereogenic centres and to investigate the stereogenic properties of them. The reactions of compound 1 with bulky reagent, dibenzylamine might progress to until the tetrakis stage of chlorine replacement occurs and further substitutions by dibenzyamine do not occur. The structures of the products (3, 4, 5a, 5b, 6a, 6b, 7a and 7b) were determined by elemental and mass analyses, 1 H and 31 P NMR spectroscopies and for compounds 3, 4 and 5a where suitable single crystals were obtained, the structures were characterised by X-ray crystallography. The stereogenic properties of compound 3 which has one stereogenic centre and compound 5b which has two stereogenic centres were investigated by 31 P NMR spectroscopy on the addition of a chiral solvating agent. It was found that 31 P NMR/CSA method did not lead to the expected separation of the signals of enantiomers (3, 5b), even molar ratio of CSA:compound is up to 100:1 for dibenzylamine derivatives of cyclotetraphosphazene . Hence X-ray crystallograp

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Author

Semih Doğan; Ceylan Mutlu Balcı; Serap Beşli

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0020-1693)

Published

2018

Language

EN

Field

Chemistry (Physical Sciences)