Poly(pyrazol-1-ylmethyl)Benzenes: New Multidentate Ligands

Hartshorn, CM; Steel, P. J.

doi:10.1071/ch9951587

Cited by 72 publications

(38 citation statements)

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“…The solid was crystallised in acetone/pentane to obtain crystals of 9b. IR: ν ϭ 835 [ν(CϪCH 3 (BF 4 anion). The crystals for X-ray diffraction were obtained by crystallisation in dichloromethane/pentane.…”

Section: (D) [{Pd(η 3 -C 4 H 7 )} 2 (Hpzb)](x) 2 (5) and [{Pd(η 3 -C mentioning

confidence: 99%

Variety in the Coordination Modes of the Ligand Hexakis(pyrazol-1-yl)benzene (Hpzb) to PdII, PtII and CuI Centres

Guerrero

Jalón

Manzano

et al. 2002

Eur. J. Inorg. Chem.

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The structure and conformational analysis of eight complexes derived from hexakis(pyrazol‐1‐yl)benzene (hpzb) have been carried out by means of X‐ray crystallography and NMR spectroscopy. The metallic fragments [Pd(C6F5)2, [Pd(η3‐2‐Me‐C3H4)]+, PtCl2 and Cu(PMe3)+] coordinate with two adjacent pyrazole residues yielding complexes with one, two or three metallic centres. The crystal and molecular structures of [{Pd(C6F5)2}2(hpzb)], [{Pd(η3‐C4H7)}2(hpzb)](TfO)2, [{Cu(PMe3)}2(hpzb)](BF4)2 and [{Pd(η3‐C4H7)}3(hpzb)](TfO)3 have been determined. The structure of each of the complexes depends on the fact that the metal atoms, when two or three are present, prefer to be situated on opposite faces of the benzene ring. Evidence for restricted rotation of the uncoordinated pyrazolyl groups has been found for the free ligand and monometallic derivatives, while free rotation of these groups at room temperature has been observed for the dimetallic complexes. Furthermore, the derivative {[Cu(PMe3)]2(hpzb)}(BF4)2 and probably [{Pd(η3‐C4H7)}2(hpzb)](TfO)2 exhibit metallotropy on the NMR time scale. (© Wiley‐VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)

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Section: (D) [{Pd(η 3 -C 4 H 7 )} 2 (Hpzb)](x) 2 (5) and [{Pd(η 3 -C mentioning

confidence: 99%

Variety in the Coordination Modes of the Ligand Hexakis(pyrazol-1-yl)benzene (Hpzb) to PdII, PtII and CuI Centres

Guerrero

Jalón

Manzano

et al. 2002

Eur. J. Inorg. Chem.

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“…The free ligands L1, L2 and L3 (Scheme 1) were synthesized according to the reported methods [27,28]. All other chemicals were commercially available and used without further purification.…”

Section: Materials and Measurementsmentioning

confidence: 99%

Synthesis, crystal structures and photocatalytic properties of four silver(I) coordination polymers based on semirigid bis(pyrazole) and carboxylic acid co-ligands

et al. 2016

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Four Ag(I) coordination polymers, formulated as [Ag(L1)(tpa) 0.5 ] n (1), {[Ag(L2)(ndc) 0.5 ]Á0.5H 2 ndc} n (2), [Ag(L3) 0.5 (ndc) 0.5 ] n (3) and {[Ag(L3)]ÁH 3 bptc} n (4) (L1= 4,4 0 -bis(pyrazole-1-ylmethyl)-biphenyl, L2 = 4,4 0 -bis(3,5-dimethylpyrazol-1-ylmethyl)-biphenyl, L3 = 1,4-bis(3,5-dimethylpyrazol-1-ylmethyl)benzene, H 2 tpa = terephthalic acid, H 2 ndc = 2,6-naphthalenedicarboxylic acid, H 4 bptc = 3,3 0 ,4,4 0 -biphenyltetracarboxylic acid), have been hydrothermally synthesized and structurally characterized. Complex 1 features the rare binodal (4,4)-connected 2D 4,4L10 topological network with a point symbol of {3 2 Á4.6 2 Á7} 2 {3 2 Á6 2 Á7 2 }. Complex 2 has a folded ladder-like chain structure, which is further extended into a 3D supramolecular network via O-HÁÁÁO hydrogen bonding and pÁÁÁp stacking interactions. Complexes 3 and 4 both possess 1D zigzag chain structures. Complex 3 is further extended into a binodal (3,4)-connected network with the point symbol of {4.8 4 Á10}{6 2 Á8 2 } 2 by AgÁÁÁO weak interactions, while complex 4 is further connected through O-HÁÁÁO hydrogen bonding and pÁÁÁp interactions to afford a 2D supramolecular structure. The photoluminescence spectra and photocatalytic properties of these complexes for degradation of methylene blue and methyl orange are reported.

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“…Chin et al [54] observed a remarkable selectivity of NH 4 + over K + (10 2.6 ) with the pyrazole receptor 29 (comprised of a trimethylated phenyl ring as a platform with three pyrazole subunits, which Hartshorn and Steel [58, 59] synthesised as a new class of metal-encapsulating ligands. However, the affinity of 29 for NH 4 + is smaller than that of nonactin.…”

Section: Cation Recognitionmentioning

confidence: 99%