''Potassium potassates'' based on dihydrotriazinide ligands: syntheses, crystal structures, and comparison with other alkali metal dihydrotriazinide compounds

W Clegg, M R J Elsegood, L Horsburgh, Robert Mulvey, M J Ross

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

A series of dihydro-s-triazinidopotassium complexes have been synthesised and structurally characterised by X-ray diffraction. Two of them, the sesqui-pyridine solvate 2 and the mono-THF solvate 3, can be classified in formal terms as ''potassium potassates'' in conforming to the structural pattern established previously for the sesqui-THF solvate 1, the first reported 'ate of this type. Formally complex [(R2K)(-)] anions are linked to K+ cations in polymeric, zig-zag chain arrangements. Solvate 3 also possesses a unique RK coordination as a direct result of having fewer solvent Ligands. DMSO analogue 4 deviates from this uniformity in adopting a centrosymmetric, dimeric (OK)(2) ring structure featuring both terminal and bridging DMSO ligands. The dihydro-s-triazinidosodium tris(THF) solvate 5 is found to be a monomer. For comparative purposes, the metal-free, parent triazine molecule 6 has also been subjected to an X-ray crystallographic study: it displays a 1,2-dihydro ring setup as opposed to the 1,4-dihydro alternative existing in the metallo examples. Triazine 6 is also found to form a N-H ... Br bridge in the dimeric structure of the lithium bromide bis (THF) solvate 7, a suspected hydrolysis product from the reaction of dihydro-s-triazinidolithium 8 and magnesium bromide bis(ether) adduct.

LanguageEnglish
Pages621-631
Number of pages11
JournalChemische berichte
Volume130
Issue number5
DOIs
Publication statusPublished - May 1997

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Alkali metal compounds
Triazines
Dimethyl Sulfoxide
Potassium
Crystal structure
Ligands
Ether
Anions
Cations
Hydrolysis
Monomers
Metals
X ray diffraction
X rays
Molecules

Keywords

  • alkali metals
  • 'ate compounds
  • dihydrotriazine
  • potassium
  • N ligands
  • lithium
  • complexes
  • tetrahydrofuran
  • adduct
  • nitriles
  • bromide

Cite this

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title = "''Potassium potassates'' based on dihydrotriazinide ligands: syntheses, crystal structures, and comparison with other alkali metal dihydrotriazinide compounds",
abstract = "A series of dihydro-s-triazinidopotassium complexes have been synthesised and structurally characterised by X-ray diffraction. Two of them, the sesqui-pyridine solvate 2 and the mono-THF solvate 3, can be classified in formal terms as ''potassium potassates'' in conforming to the structural pattern established previously for the sesqui-THF solvate 1, the first reported 'ate of this type. Formally complex [(R2K)(-)] anions are linked to K+ cations in polymeric, zig-zag chain arrangements. Solvate 3 also possesses a unique RK coordination as a direct result of having fewer solvent Ligands. DMSO analogue 4 deviates from this uniformity in adopting a centrosymmetric, dimeric (OK)(2) ring structure featuring both terminal and bridging DMSO ligands. The dihydro-s-triazinidosodium tris(THF) solvate 5 is found to be a monomer. For comparative purposes, the metal-free, parent triazine molecule 6 has also been subjected to an X-ray crystallographic study: it displays a 1,2-dihydro ring setup as opposed to the 1,4-dihydro alternative existing in the metallo examples. Triazine 6 is also found to form a N-H ... Br bridge in the dimeric structure of the lithium bromide bis (THF) solvate 7, a suspected hydrolysis product from the reaction of dihydro-s-triazinidolithium 8 and magnesium bromide bis(ether) adduct.",
keywords = "alkali metals, 'ate compounds, dihydrotriazine, potassium, N ligands, lithium, complexes, tetrahydrofuran, adduct, nitriles, bromide",
author = "W Clegg and Elsegood, {M R J} and L Horsburgh and Robert Mulvey and Ross, {M J}",
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''Potassium potassates'' based on dihydrotriazinide ligands: syntheses, crystal structures, and comparison with other alkali metal dihydrotriazinide compounds. / Clegg, W ; Elsegood, M R J ; Horsburgh, L ; Mulvey, Robert; Ross, M J .

In: Chemische berichte, Vol. 130, No. 5, 05.1997, p. 621-631.

Research output: Contribution to journalArticle

TY - JOUR

T1 - ''Potassium potassates'' based on dihydrotriazinide ligands: syntheses, crystal structures, and comparison with other alkali metal dihydrotriazinide compounds

AU - Clegg, W

AU - Elsegood, M R J

AU - Horsburgh, L

AU - Mulvey, Robert

AU - Ross, M J

PY - 1997/5

Y1 - 1997/5

N2 - A series of dihydro-s-triazinidopotassium complexes have been synthesised and structurally characterised by X-ray diffraction. Two of them, the sesqui-pyridine solvate 2 and the mono-THF solvate 3, can be classified in formal terms as ''potassium potassates'' in conforming to the structural pattern established previously for the sesqui-THF solvate 1, the first reported 'ate of this type. Formally complex [(R2K)(-)] anions are linked to K+ cations in polymeric, zig-zag chain arrangements. Solvate 3 also possesses a unique RK coordination as a direct result of having fewer solvent Ligands. DMSO analogue 4 deviates from this uniformity in adopting a centrosymmetric, dimeric (OK)(2) ring structure featuring both terminal and bridging DMSO ligands. The dihydro-s-triazinidosodium tris(THF) solvate 5 is found to be a monomer. For comparative purposes, the metal-free, parent triazine molecule 6 has also been subjected to an X-ray crystallographic study: it displays a 1,2-dihydro ring setup as opposed to the 1,4-dihydro alternative existing in the metallo examples. Triazine 6 is also found to form a N-H ... Br bridge in the dimeric structure of the lithium bromide bis (THF) solvate 7, a suspected hydrolysis product from the reaction of dihydro-s-triazinidolithium 8 and magnesium bromide bis(ether) adduct.

AB - A series of dihydro-s-triazinidopotassium complexes have been synthesised and structurally characterised by X-ray diffraction. Two of them, the sesqui-pyridine solvate 2 and the mono-THF solvate 3, can be classified in formal terms as ''potassium potassates'' in conforming to the structural pattern established previously for the sesqui-THF solvate 1, the first reported 'ate of this type. Formally complex [(R2K)(-)] anions are linked to K+ cations in polymeric, zig-zag chain arrangements. Solvate 3 also possesses a unique RK coordination as a direct result of having fewer solvent Ligands. DMSO analogue 4 deviates from this uniformity in adopting a centrosymmetric, dimeric (OK)(2) ring structure featuring both terminal and bridging DMSO ligands. The dihydro-s-triazinidosodium tris(THF) solvate 5 is found to be a monomer. For comparative purposes, the metal-free, parent triazine molecule 6 has also been subjected to an X-ray crystallographic study: it displays a 1,2-dihydro ring setup as opposed to the 1,4-dihydro alternative existing in the metallo examples. Triazine 6 is also found to form a N-H ... Br bridge in the dimeric structure of the lithium bromide bis (THF) solvate 7, a suspected hydrolysis product from the reaction of dihydro-s-triazinidolithium 8 and magnesium bromide bis(ether) adduct.

KW - alkali metals

KW - 'ate compounds

KW - dihydrotriazine

KW - potassium

KW - N ligands

KW - lithium

KW - complexes

KW - tetrahydrofuran

KW - adduct

KW - nitriles

KW - bromide

U2 - 10.1002/cber.19971300513

DO - 10.1002/cber.19971300513

M3 - Article

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SP - 621

EP - 631

JO - Chemische berichte

T2 - Chemische berichte

JF - Chemische berichte

SN - 0009-2940

IS - 5

ER -