Phosphophosphidites Derived from BINOL

Adam Gorman, Jessica Cross, Rachel Doyle, Thomas Leonard, Paul Pringle*, Hazel Sparkes

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)
59 Downloads (Pure)

Abstract

Phosphophosphidites of the type R 2 P–P(binol) [where binol = the dianion of (S)-1,1′-bi-2-naphthol] are the phosphorus analogues of the ubiquitous phosphoramidites, R 2 N–P(binol) and are readily accessed by the chlorosilane elimination reaction between R 2 P–SiMe 3 and Cl–P(binol). The crystal structure of iPr 2 P–P(binol) (1) has been determined and shows a P–P bond length in the normal range. The solution reactions of 1 have been investigated, principally by 31 P NMR spectroscopy which has revealed that: (a) in contrast to the phosphoramidites, 1 is extremely moisture sensitive; (b) the P–P bond in 1 is cleaved upon reaction with H 2 O, MeOH or mesitol; (c) the P–O bonds in 1 are cleaved upon reaction with pyrrolidine; (d) the integrity of 1 is retained upon coordination to BH 3 or Mo 0 . The crystal structure of cis-[Mo(CO) 4 (1) 2 ] shows that 1 is bound to the Mo at the P(binol) site and the ν CO of 2032 cm -1 indicates that 1 has similar ligand properties to a phosphonite.

Original languageEnglish
Pages (from-to)1633-1639
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Volume2019
Issue number11
Early online date28 Feb 2019
DOIs
Publication statusPublished - 31 Mar 2019

Structured keywords

  • BCS and TECS CDTs

Keywords

  • Diphosphane
  • phosphoramidite analogue
  • lewis basicity
  • P-P bond
  • Mo complex

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