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Titolo:
Steric stabilisation of the P-P bond in a bulky tetraorganodiphosphine: synthesis, characterisation and X-ray structure determination of tetrakis(2,4,6-triisopropylphenyl)diphosphine
Autore:
Brady, FJ; Cardin, CJ; Cardin, DJ; Wilcock, DJ;
Indirizzi:
Univ Reading, Dept Chem, Reading RG6 6AD, Berks, England Univ Reading Reading Berks England RG6 6AD eading RG6 6AD, Berks, England Univ Dublin Trinity Coll, Dept Chem, Dublin 2, Ireland Univ Dublin TrinityColl Dublin Ireland 2 , Dept Chem, Dublin 2, Ireland
Titolo Testata:
INORGANICA CHIMICA ACTA
fascicolo: 1, volume: 298, anno: 2000,
pagine: 1 - 8
SICI:
0020-1693(20000130)298:1<1:SSOTPB>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRYSTAL-STRUCTURE;
Keywords:
crystal structures; diphosphine;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Cardin, DJ Univ Reading, Dept Chem, POB 224, Reading RG6 6AD, Berks, England Univ Reading POB 224 Reading Berks England RG6 6AD rks, England
Citazione:
F.J. Brady et al., "Steric stabilisation of the P-P bond in a bulky tetraorganodiphosphine: synthesis, characterisation and X-ray structure determination of tetrakis(2,4,6-triisopropylphenyl)diphosphine", INORG CHIM, 298(1), 2000, pp. 1-8

Abstract

We report the synthesis and characterisation of tetrakis(2,4,6-triisopropylphenyl)diphosphine. Synthesis is effected by the treatment of PCl3 with anexcess of 2,4,6-triisopropylphenyllithium (or the equivalent Grignard reagent) in 70% yield. While under normal circumstances the triarylphosphine would be expected, excessive bulk prevents this, and the resulting diphosphine is, unusually, stable to P-P cleavage by further organolithium moieties. The compound is stable, both thermally (m.p. 185 degrees C) and to air and water in the solid state, although conversion to the equivalent diorganophosphinate ester is effected by boiling ethanolic solutions in air. Crystallisation from hexane/ethanol afforded pale yellow crystals of X-ray quality. The molecule is characterised by m.p., IR, NMR, elemental analysis (C, H, P) and MS. The X-ray structure shows an antiperiplanar conformation with a P-P separation of 2.2461(16) Angstrom. Comparisons are made with other diphosphines, the title compound being only the fourth simple diphosphine to be structurally characterised. (C) 2000 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 04:20:33