A unique lithium halide complex, [(LiBr)2·3HMPA·toluene]: synthesis from reaction of solid NH4Br with BunLi in HMPA (hexamethylphosphoramide)/toluene media, crystal structure showing two Li–Br units linked by three µ2-HMPA ligands, and detection of 7Li 31P coupling in solutions of the complex

D BARR, M J DOYLE, Robert Mulvey, P R RAITHBY, D REED, R SNAITH, D S WRIGHT

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Abstract

Reaction of solid NH4Br with BunLi and HMPA (hexamethylphosphoramide)(1 : 1 : 2 ratio) in toluene produces (LiBr)2·3HMPA·toluene, (1), shown by X-ray crystallography to contain (LiBr)2·3HMPA molecules whose two terminal Li–Br units are linked by three µ2-HMPA ligands and with toluene molecules lying between these units in the lattice; in arene solutions, the (LiBr)2·3HMPA units remain intact, giving rise in 7Li n.m.r. spectra to 1 : 3 : 3 : 1 quartets caused by through-bond (OP) coupling of each 7Li nucleus to three 31P(HMPA) centres.
LanguageEnglish
Pages318-319
Number of pages2
JournalJournal of the Chemical Society, Chemical Communications
Issue number5
DOIs
Publication statusPublished - 1 Mar 1989

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Hempa
Toluene
Lithium
Ligands
X Ray Crystallography

Keywords

  • lithium halide complex
  • X-ray crystallography
  • lattice

Cite this

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title = "A unique lithium halide complex, [(LiBr)2·3HMPA·toluene]: synthesis from reaction of solid NH4Br with BunLi in HMPA (hexamethylphosphoramide)/toluene media, crystal structure showing two Li–Br units linked by three µ2-HMPA ligands, and detection of 7Li 31P coupling in solutions of the complex",
abstract = "Reaction of solid NH4Br with BunLi and HMPA (hexamethylphosphoramide)(1 : 1 : 2 ratio) in toluene produces (LiBr)2·3HMPA·toluene, (1), shown by X-ray crystallography to contain (LiBr)2·3HMPA molecules whose two terminal Li–Br units are linked by three µ2-HMPA ligands and with toluene molecules lying between these units in the lattice; in arene solutions, the (LiBr)2·3HMPA units remain intact, giving rise in 7Li n.m.r. spectra to 1 : 3 : 3 : 1 quartets caused by through-bond (OP) coupling of each 7Li nucleus to three 31P(HMPA) centres.",
keywords = "lithium halide complex , X-ray crystallography , lattice",
author = "D BARR and DOYLE, {M J} and Robert Mulvey and RAITHBY, {P R} and D REED and R SNAITH and WRIGHT, {D S}",
year = "1989",
month = "3",
day = "1",
doi = "10.1039/C39890000318",
language = "English",
pages = "318--319",
journal = "Journal of the Chemical Society, Chemical Communications",
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TY - JOUR

T1 - A unique lithium halide complex, [(LiBr)2·3HMPA·toluene]: synthesis from reaction of solid NH4Br with BunLi in HMPA (hexamethylphosphoramide)/toluene media, crystal structure showing two Li–Br units linked by three µ2-HMPA ligands, and detection of 7Li 31P coupling in solutions of the complex

AU - BARR, D

AU - DOYLE, M J

AU - Mulvey, Robert

AU - RAITHBY, P R

AU - REED, D

AU - SNAITH, R

AU - WRIGHT, D S

PY - 1989/3/1

Y1 - 1989/3/1

N2 - Reaction of solid NH4Br with BunLi and HMPA (hexamethylphosphoramide)(1 : 1 : 2 ratio) in toluene produces (LiBr)2·3HMPA·toluene, (1), shown by X-ray crystallography to contain (LiBr)2·3HMPA molecules whose two terminal Li–Br units are linked by three µ2-HMPA ligands and with toluene molecules lying between these units in the lattice; in arene solutions, the (LiBr)2·3HMPA units remain intact, giving rise in 7Li n.m.r. spectra to 1 : 3 : 3 : 1 quartets caused by through-bond (OP) coupling of each 7Li nucleus to three 31P(HMPA) centres.

AB - Reaction of solid NH4Br with BunLi and HMPA (hexamethylphosphoramide)(1 : 1 : 2 ratio) in toluene produces (LiBr)2·3HMPA·toluene, (1), shown by X-ray crystallography to contain (LiBr)2·3HMPA molecules whose two terminal Li–Br units are linked by three µ2-HMPA ligands and with toluene molecules lying between these units in the lattice; in arene solutions, the (LiBr)2·3HMPA units remain intact, giving rise in 7Li n.m.r. spectra to 1 : 3 : 3 : 1 quartets caused by through-bond (OP) coupling of each 7Li nucleus to three 31P(HMPA) centres.

KW - lithium halide complex

KW - X-ray crystallography

KW - lattice

U2 - 10.1039/C39890000318

DO - 10.1039/C39890000318

M3 - Article

SP - 318

EP - 319

JO - Journal of the Chemical Society, Chemical Communications

T2 - Journal of the Chemical Society, Chemical Communications

JF - Journal of the Chemical Society, Chemical Communications

SN - 0022-4936

IS - 5

ER -