Potassium S2N-heteroscorpionates: Structure and iridaboratrane formation

María J. López-Gómez; Neil G. Connelly; Mairi F. Haddow; Alex Hamilton; Matteo Lusi; Ulrich Baisch; A. Guy Orpen

doi:10.1039/c0dt01718c

Potassium S₂N-heteroscorpionates: Structure and iridaboratrane formation

María J. López-Gómez
, Neil G. Connelly
, Mairi F. Haddow
, Alex Hamilton
, Matteo Lusi
, Ulrich Baisch
, A. Guy Orpen

University of Bristol

Research output: Contribution to journal › Article › peer-review

Abstract

The potassium salts of the new S₂N-heteroscorpionate ligand hydrobis(methimazolyl)(3,5-dimethylpyrazolyl)borate [HB(mt)₂(pz ^3,5-Me)]^- and its known analogue hydrobis(methimazolyl) (pyrazolyl)borate [HB(mt)₂(pz)]^- (prepared from KTp′ or KTp and methimazole, Hmt), and the adduct KTp·Hmt have polymeric structures in the solid state (the first a ladder and the other two chains). The iridaboratranes [IrHLL′{B(mt)₂X}] (X = pz^3,5-Me or pz), prepared from the heteroscorpionate anion and [{Ir(cod)(μ-Cl)} ₂] (LL′ = cod), subsequent carbonylation [LL′ = (CO) ₂] and then reaction with phosphine [LL′ = (CO)(PR ₃), R = Ph or Cy], have a pendant pyrazolyl ring and a bicyclo-[3.3.0] cage formed by an S₂-bound B(mt)₂ fragment. The binuclear species [(cod)HIr{μ-B(mt)₃}IrCl(cod)], the only isolated product of the reaction of KTm with [{Ir(cod)(μ-Cl)} ₂], also has an S₂-bound iridaboratrane unit but with the third mt ring linked to square planar iridium(i).

Original language	English
Pages (from-to)	4647-4659
Number of pages	13
Journal	Dalton Transactions
Volume	40
Issue number	17
DOIs	https://doi.org/10.1039/c0dt01718c
Publication status	Published - 7 May 2011
Externally published	Yes

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10.1039/c0dt01718c

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title = "Potassium S2N-heteroscorpionates: Structure and iridaboratrane formation",

abstract = "The potassium salts of the new S2N-heteroscorpionate ligand hydrobis(methimazolyl)(3,5-dimethylpyrazolyl)borate [HB(mt)2(pz 3,5-Me)]- and its known analogue hydrobis(methimazolyl) (pyrazolyl)borate [HB(mt)2(pz)]- (prepared from KTp′ or KTp and methimazole, Hmt), and the adduct KTp·Hmt have polymeric structures in the solid state (the first a ladder and the other two chains). The iridaboratranes [IrHLL′\{B(mt)2X\}] (X = pz3,5-Me or pz), prepared from the heteroscorpionate anion and [\{Ir(cod)(μ-Cl)\} 2] (LL′ = cod), subsequent carbonylation [LL′ = (CO) 2] and then reaction with phosphine [LL′ = (CO)(PR 3), R = Ph or Cy], have a pendant pyrazolyl ring and a bicyclo-[3.3.0] cage formed by an S2-bound B(mt)2 fragment. The binuclear species [(cod)HIr\{μ-B(mt)3\}IrCl(cod)], the only isolated product of the reaction of KTm with [\{Ir(cod)(μ-Cl)\} 2], also has an S2-bound iridaboratrane unit but with the third mt ring linked to square planar iridium(i).",

author = "L{\'o}pez-G{\'o}mez, \{Mar{\'i}a J.\} and Connelly, \{Neil G.\} and Haddow, \{Mairi F.\} and Alex Hamilton and Matteo Lusi and Ulrich Baisch and Orpen, \{A. Guy\}",

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T2 - Structure and iridaboratrane formation

AU - López-Gómez, María J.

AU - Connelly, Neil G.

AU - Haddow, Mairi F.

AU - Hamilton, Alex

AU - Lusi, Matteo

AU - Baisch, Ulrich

AU - Orpen, A. Guy

PY - 2011/5/7

Y1 - 2011/5/7

N2 - The potassium salts of the new S2N-heteroscorpionate ligand hydrobis(methimazolyl)(3,5-dimethylpyrazolyl)borate [HB(mt)2(pz 3,5-Me)]- and its known analogue hydrobis(methimazolyl) (pyrazolyl)borate [HB(mt)2(pz)]- (prepared from KTp′ or KTp and methimazole, Hmt), and the adduct KTp·Hmt have polymeric structures in the solid state (the first a ladder and the other two chains). The iridaboratranes [IrHLL′{B(mt)2X}] (X = pz3,5-Me or pz), prepared from the heteroscorpionate anion and [{Ir(cod)(μ-Cl)} 2] (LL′ = cod), subsequent carbonylation [LL′ = (CO) 2] and then reaction with phosphine [LL′ = (CO)(PR 3), R = Ph or Cy], have a pendant pyrazolyl ring and a bicyclo-[3.3.0] cage formed by an S2-bound B(mt)2 fragment. The binuclear species [(cod)HIr{μ-B(mt)3}IrCl(cod)], the only isolated product of the reaction of KTm with [{Ir(cod)(μ-Cl)} 2], also has an S2-bound iridaboratrane unit but with the third mt ring linked to square planar iridium(i).

AB - The potassium salts of the new S2N-heteroscorpionate ligand hydrobis(methimazolyl)(3,5-dimethylpyrazolyl)borate [HB(mt)2(pz 3,5-Me)]- and its known analogue hydrobis(methimazolyl) (pyrazolyl)borate [HB(mt)2(pz)]- (prepared from KTp′ or KTp and methimazole, Hmt), and the adduct KTp·Hmt have polymeric structures in the solid state (the first a ladder and the other two chains). The iridaboratranes [IrHLL′{B(mt)2X}] (X = pz3,5-Me or pz), prepared from the heteroscorpionate anion and [{Ir(cod)(μ-Cl)} 2] (LL′ = cod), subsequent carbonylation [LL′ = (CO) 2] and then reaction with phosphine [LL′ = (CO)(PR 3), R = Ph or Cy], have a pendant pyrazolyl ring and a bicyclo-[3.3.0] cage formed by an S2-bound B(mt)2 fragment. The binuclear species [(cod)HIr{μ-B(mt)3}IrCl(cod)], the only isolated product of the reaction of KTm with [{Ir(cod)(μ-Cl)} 2], also has an S2-bound iridaboratrane unit but with the third mt ring linked to square planar iridium(i).

UR - https://www.scopus.com/pages/publications/79954601366

U2 - 10.1039/c0dt01718c

DO - 10.1039/c0dt01718c

M3 - Article

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SN - 1477-9226

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EP - 4659

JO - Dalton Transactions

JF - Dalton Transactions

IS - 17

ER -

Potassium S₂N-heteroscorpionates: Structure and iridaboratrane formation

Abstract

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