Elsevier

Polyhedron

Volume 7, Issues 19–20, 1988, Pages 1875-1879
Polyhedron

Polyphosphorus ligands—V. The synthesis, phosphorus-31 NMR spectra and conformations of the polykis(diphenylphosphino) benzens (Ph2P)nC6H6−n (n = 1–4)

https://doi.org/10.1016/S0277-5387(00)80699-3Get rights and content

Abstract

All isomers of (Ph2P)nC6H6−n (n = 1–4) have been prepared by the reaction between the corresponding isomer of C6H6−nFn and Ph2PNa in liquid ammonia. In many cases their phosphorus-31 NMR spectra are structurally diagnostic, with δ(31P) having values characteristic of the stereochemical environment of the Ph2P unit, and the couplings 3J(PP) being conformationally dependent and lying in the range 35–154 Hz, while 4J(PP) and 5J(PP) are much smaller.

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For Part IV see ref. 1.

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