Novel multidentate pyridyl/thiazolyl ligands containing terpyridine units: Formation of dinuclear and trinuclear double helicate complexes

Craig R. Rice, Christian J. Baylies, Hayley J. Clayton, John C. Jeffery, Rowena L. Paul, Michael D. Ward

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Three new multidentate N-donor ligands L1–L3, which containa combination of pyridyl and thiazolyl donor units, have been prepared startingfrom 2,2′:6′,2″-terpyridine. The extended linear sequence of ortho-linkedN-donor heterocycles (five for L1; six for L2; and seven for L3) is reminiscentof the well-known oligopyridines, although they have different coordinationproperties due to the presence of five-membered thiazolyl rings which result innatural breaks of the ligand backbone into distinct bidentate or terdentatedomains. Thus, the pentadentate ligand L1 partitions into terdentate andbidentate domains to give a dinuclear double helicate [M2(L1)2]4+ with Cu(II).The hexadentate ligand L2 partitions into two terdentate domains to givedinuclear double helicates [M2(L2)2]4+ with six-coordinate first-row transitionmetals dications (M=Ni and Co). The heptadentate ligand L3 partitions into twoterminal bidentate and a central terdentate domains to give a trinuclear doublehelicate [Cd3(L3)2]6+ with Cd(II). The formation of these complexes highlightsthe fact that the thiazole group is instrumental in instructing thepartitioning of the ligand, which in turn controls the formation of thehelicate complexes.

Three new multidentate N-donor ligands L1–L3, which containa combination of pyridyl and thiazolyl donor units, have been prepared startingfrom 2,2′:6′,2′′-terpyridine. Several complexes with transition metal ions havebeen prepared. The pentadentate ligand L1 partitions into terdentate andbidentate domains to give the dinuclear double helicate [Cu2(L1)2]4+. Thehexadentate ligand L2 partitions into two terdentate domains to give dinucleardouble helicates [M2(L2)]4+ with Ni and Co. The heptadentate ligand L3partitions into two bidentate and a terdentate domains to give a trinucleardouble helicate [Cd3(L3)2]6+.

LanguageEnglish
Pages207-216
Number of pages10
JournalInorganica Chimica Acta
Volume351
Issue number1
Early online date10 Jul 2003
DOIs
Publication statusPublished - 22 Jul 2003

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Ligands
ligands
partitions
Thiazoles
Transition metals
Metal ions
metal ions
transition metals
rings

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Rice, Craig R. ; Baylies, Christian J. ; Clayton, Hayley J. ; Jeffery, John C. ; Paul, Rowena L. ; Ward, Michael D. / Novel multidentate pyridyl/thiazolyl ligands containing terpyridine units : Formation of dinuclear and trinuclear double helicate complexes. In: Inorganica Chimica Acta. 2003 ; Vol. 351, No. 1. pp. 207-216.
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abstract = "Three new multidentate N-donor ligands L1–L3, which containa combination of pyridyl and thiazolyl donor units, have been prepared startingfrom 2,2′:6′,2″-terpyridine. The extended linear sequence of ortho-linkedN-donor heterocycles (five for L1; six for L2; and seven for L3) is reminiscentof the well-known oligopyridines, although they have different coordinationproperties due to the presence of five-membered thiazolyl rings which result innatural breaks of the ligand backbone into distinct bidentate or terdentatedomains. Thus, the pentadentate ligand L1 partitions into terdentate andbidentate domains to give a dinuclear double helicate [M2(L1)2]4+ with Cu(II).The hexadentate ligand L2 partitions into two terdentate domains to givedinuclear double helicates [M2(L2)2]4+ with six-coordinate first-row transitionmetals dications (M=Ni and Co). The heptadentate ligand L3 partitions into twoterminal bidentate and a central terdentate domains to give a trinuclear doublehelicate [Cd3(L3)2]6+ with Cd(II). The formation of these complexes highlightsthe fact that the thiazole group is instrumental in instructing thepartitioning of the ligand, which in turn controls the formation of thehelicate complexes.Three new multidentate N-donor ligands L1–L3, which containa combination of pyridyl and thiazolyl donor units, have been prepared startingfrom 2,2′:6′,2′′-terpyridine. Several complexes with transition metal ions havebeen prepared. The pentadentate ligand L1 partitions into terdentate andbidentate domains to give the dinuclear double helicate [Cu2(L1)2]4+. Thehexadentate ligand L2 partitions into two terdentate domains to give dinucleardouble helicates [M2(L2)]4+ with Ni and Co. The heptadentate ligand L3partitions into two bidentate and a terdentate domains to give a trinucleardouble helicate [Cd3(L3)2]6+.",
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Novel multidentate pyridyl/thiazolyl ligands containing terpyridine units : Formation of dinuclear and trinuclear double helicate complexes. / Rice, Craig R.; Baylies, Christian J.; Clayton, Hayley J.; Jeffery, John C.; Paul, Rowena L.; Ward, Michael D.

In: Inorganica Chimica Acta, Vol. 351, No. 1, 22.07.2003, p. 207-216.

Research output: Contribution to journalArticle

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T1 - Novel multidentate pyridyl/thiazolyl ligands containing terpyridine units

T2 - Inorganica Chimica Acta

AU - Rice, Craig R.

AU - Baylies, Christian J.

AU - Clayton, Hayley J.

AU - Jeffery, John C.

AU - Paul, Rowena L.

AU - Ward, Michael D.

PY - 2003/7/22

Y1 - 2003/7/22

N2 - Three new multidentate N-donor ligands L1–L3, which containa combination of pyridyl and thiazolyl donor units, have been prepared startingfrom 2,2′:6′,2″-terpyridine. The extended linear sequence of ortho-linkedN-donor heterocycles (five for L1; six for L2; and seven for L3) is reminiscentof the well-known oligopyridines, although they have different coordinationproperties due to the presence of five-membered thiazolyl rings which result innatural breaks of the ligand backbone into distinct bidentate or terdentatedomains. Thus, the pentadentate ligand L1 partitions into terdentate andbidentate domains to give a dinuclear double helicate [M2(L1)2]4+ with Cu(II).The hexadentate ligand L2 partitions into two terdentate domains to givedinuclear double helicates [M2(L2)2]4+ with six-coordinate first-row transitionmetals dications (M=Ni and Co). The heptadentate ligand L3 partitions into twoterminal bidentate and a central terdentate domains to give a trinuclear doublehelicate [Cd3(L3)2]6+ with Cd(II). The formation of these complexes highlightsthe fact that the thiazole group is instrumental in instructing thepartitioning of the ligand, which in turn controls the formation of thehelicate complexes.Three new multidentate N-donor ligands L1–L3, which containa combination of pyridyl and thiazolyl donor units, have been prepared startingfrom 2,2′:6′,2′′-terpyridine. Several complexes with transition metal ions havebeen prepared. The pentadentate ligand L1 partitions into terdentate andbidentate domains to give the dinuclear double helicate [Cu2(L1)2]4+. Thehexadentate ligand L2 partitions into two terdentate domains to give dinucleardouble helicates [M2(L2)]4+ with Ni and Co. The heptadentate ligand L3partitions into two bidentate and a terdentate domains to give a trinucleardouble helicate [Cd3(L3)2]6+.

AB - Three new multidentate N-donor ligands L1–L3, which containa combination of pyridyl and thiazolyl donor units, have been prepared startingfrom 2,2′:6′,2″-terpyridine. The extended linear sequence of ortho-linkedN-donor heterocycles (five for L1; six for L2; and seven for L3) is reminiscentof the well-known oligopyridines, although they have different coordinationproperties due to the presence of five-membered thiazolyl rings which result innatural breaks of the ligand backbone into distinct bidentate or terdentatedomains. Thus, the pentadentate ligand L1 partitions into terdentate andbidentate domains to give a dinuclear double helicate [M2(L1)2]4+ with Cu(II).The hexadentate ligand L2 partitions into two terdentate domains to givedinuclear double helicates [M2(L2)2]4+ with six-coordinate first-row transitionmetals dications (M=Ni and Co). The heptadentate ligand L3 partitions into twoterminal bidentate and a central terdentate domains to give a trinuclear doublehelicate [Cd3(L3)2]6+ with Cd(II). The formation of these complexes highlightsthe fact that the thiazole group is instrumental in instructing thepartitioning of the ligand, which in turn controls the formation of thehelicate complexes.Three new multidentate N-donor ligands L1–L3, which containa combination of pyridyl and thiazolyl donor units, have been prepared startingfrom 2,2′:6′,2′′-terpyridine. Several complexes with transition metal ions havebeen prepared. The pentadentate ligand L1 partitions into terdentate andbidentate domains to give the dinuclear double helicate [Cu2(L1)2]4+. Thehexadentate ligand L2 partitions into two terdentate domains to give dinucleardouble helicates [M2(L2)]4+ with Ni and Co. The heptadentate ligand L3partitions into two bidentate and a terdentate domains to give a trinucleardouble helicate [Cd3(L3)2]6+.

KW - Dinuclear complexes

KW - Helicates

KW - Heptadentate ligand

KW - Trinuclear complexes

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JO - Inorganica Chimica Acta

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