The infrared spectra of coordinated perchlorates

Lewis, David L.; Estes, Eva Dixon; Hodgson, Derek J.

doi:10.1007/bf01202553

Cited by 71 publications

(29 citation statements)

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“…The strong band 1589 is assigned to ν(C=N) vibration (Drew et al 1977, Drew et al 1979. The two strong bands of ClO 4 -appeared at 1110 and 1090/cm indicated the presence of uni-dentate perchlorate ion (Lewis et al 1975). The observed bands at 621 and 667/cm also support the presence of coordinated ClO 4 -ion (Lewis et al 1975).…”

Section: Synthesis Of [Cumentioning

confidence: 87%

“…The two strong bands of ClO 4 -appeared at 1110 and 1090/cm indicated the presence of uni-dentate perchlorate ion (Lewis et al 1975). The observed bands at 621 and 667/cm also support the presence of coordinated ClO 4 -ion (Lewis et al 1975). Crystal data and details pertaining to the data collection are given Table 1.…”

Section: Synthesis Of [Cumentioning

confidence: 95%

“…Concerning bond distances, the copper(II)-imine nitrogen bonds (average 2.068 Å) and copper(II)-pyridine nitrogen bonds (average 1.939 Å) fall well within the range of distances observed for typical copper-nitrogen (Drew et al 1981) coordination compounds. The perchlorate ion is weakly coordinated to Cu(1) through a single oxygen atom with separation (Lewis et al 1975) …”

Section: Synthesis Of [Cumentioning

confidence: 99%

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Synthesis and Characterization of a Thiocyanate Bridged Dinuclear Cu(II) Complex Containing Macrocyclic Ligand Derived from Pyridine-2, 6-dicarboxaldehyde and 1, 2-bis(2-aminoethoxy) Ethane

Alam

Ahmed

Begum

et al. 2012

J Bangladesh Acad Sci

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Section: Synthesis Of [Cumentioning

confidence: 87%

Section: Synthesis Of [Cumentioning

confidence: 95%

Section: Synthesis Of [Cumentioning

confidence: 99%

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Synthesis and Characterization of a Thiocyanate Bridged Dinuclear Cu(II) Complex Containing Macrocyclic Ligand Derived from Pyridine-2, 6-dicarboxaldehyde and 1, 2-bis(2-aminoethoxy) Ethane

Alam

Ahmed

Begum

et al. 2012

J Bangladesh Acad Sci

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“…Such effect has been obsrved in low-spin Fe 2+ complexes of α-di-imine ligands [5]. The strong bands of ClO 4 -appeared at 1090 and 620-625 cm -1 , respectively, are unsplit and characteristic bands of uncoordinated ion [10,13,14]. In both complexes 2 and 3, the absence of peak at around 650 to 700 cm -1 region supported the presence of uncoordinated perchlorate ion.…”

Section: Infrared and Electronic Spectramentioning

confidence: 89%

Synthesis, Spectroscopic and Electrochemical Studies of Mononuclear Fe(II) and Ni(II) Complexes Containing a Macrocyclic Ligand Derived from Pyridine-2,6-dicarboxaldehyde and 1,2-Bis(2-aminoethoxy) Ethane

et al. 2011

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The cyclic (2+2) template condensation of 2,6-pyridinedicarboxaldehyde with 1,2-bis(2-aminoethoxy) ethane using Pb(SCN) 2 as the metal source gave dinuclear lead(II) complex, Pb 2 L 1 (SCN) 4 (1), where L 1 is tetra-Schiff-base macrocycle. The transmetallation treatment of 1 with suitable metal perchlorate yield [FeL 1 ](ClO 4 ) 2 (2) and [NiL 1 ](ClO 4 ) 2 (3). The complexes (2 & 3) have been characterized by elemental analyses, IR, UV-visible, and ESI-MS spectroscopy. Based on spectral data, octahedral geometry may be proposed for these complexes. The electrochemical behavior of iron and nickel complexes is reported.

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“…[14][15] That is, the deprotonated metalloligands of type FeL act as chiral building blocks incorporating secondary binding sites for further reaction with additional metal ions. 14 and perchlorate ν Cl-O (~1055 and 621 cm -1 ) 16 ( Figure S4). The UVvis-NIR spectrum of 1 in CH 3 CN for the region 2000-200 nm ( Figure S5a and S5b), at two different concentrations, revealed two relatively low intensity absorption bands at 570 and 776 nm, and an intense band at 279 nm.…”

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confidence: 99%

Self-Assembly of an Imidazolate-Bridged Fe^III/Cu^II Heterometallic Cage

et al. 2014

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ABSTRACT:A rare discrete mixed-valent heterometallic Fe(III)/Cu(II) cage, [Cu 6 Fe 8 L 8 ](ClO4)12·χsolvent (H 3 L = tris{[2-{(imidazole-4-yl)methylidene}amino]ethyl}amine), was designed and synthesized via metal-ion directed selfassembly with neutral tripodal metalloligands. The formation of this coordination cage was demonstrated by Xray crystallography, ESI mass spectrometry, FT-IR and UV-vis-NIR spectroscopy.The self-assembly of coordination cages has continued to receive considerable attention over the past decade, 1 because of their many potential applications in gas adsorption, 2 drug delivery, 3 catalysis, 4 magnetic materials, 5 host-guest phenomena 6 and synthetic membranes for ion channels. 7 Although a number of coordination cage types have been developed, the design and successful construction of these systems, particularly those with heteronuclear coordination motifs, still represents a significant challenge. 5d,5e,8 Three synthetic procedures have been successfully exploited for the construction of discrete heteronuclear coordination architectures: 1) exploitation of the inherent coordination properties between ligands and different metal ions for the metal-directed assembly of discrete metallosupramolecular architectures; 9 2) formation of discrete metallo-assemblies preorganised for binding a second metal ion, or ions, to yield discrete heterometallic architectures; 10 3) employing preformed metalloligands functionalised for use as building blocks reacting with additional metal ions and sometimes extra ligands. 2b,5c,5e,8b,11 In a recent review, 12 we discussed the employment of planar di-, tri-and oligonuclear platforms, including both homo-and heteronuclear systems, as structural elements for the formation of both discrete and polymeric metallosupramolecular assemblies. As part of our continuing efforts to prepare heterometallic coordination architectures, we reported the synthesis of predesigned hexanuclear Cu II /Ni II metallocycles featuring unprecedented six-node metallocoronand structural motifs 10b and the preparation of a discrete heteronuclear metallomacrocycle (Ag I 3 /Fe II ) by metalion directed self-assembly via a Fe II template. 10aHerein we report an extension of the above studies leading to the construction of a new discrete coordination heterometallic nanocage 1 [Cu 6 Fe 8 L 8 ] (ClO4)12·χsolvent (H 3 L = tris{[2-{(imidazole-4-yl)methylidene}amino]ethyl}amine) enclosing a void space of 277Å 3 . 13 Thus, we have employed a suitable metalloligand together with an additional metal ion (Cu II ) that was anticipated to favour structure-specific selfassembly. A key feature of our design was to employ short organic components that would bridge the different metal ions in a way that would give the potential for magnetic exchange between metal centers. In addition, we have employed a cooperative effect to build a robust metalloligand which can react with additional metal ions to yield a heterometallic cage. To this end we demonstrated that a heterometallic polyhedral cage can be ...

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The infrared spectra of coordinated perchlorates

Cited by 71 publications

References 19 publications

Synthesis and Characterization of a Thiocyanate Bridged Dinuclear Cu(II) Complex Containing Macrocyclic Ligand Derived from Pyridine-2, 6-dicarboxaldehyde and 1, 2-bis(2-aminoethoxy) Ethane

Synthesis and Characterization of a Thiocyanate Bridged Dinuclear Cu(II) Complex Containing Macrocyclic Ligand Derived from Pyridine-2, 6-dicarboxaldehyde and 1, 2-bis(2-aminoethoxy) Ethane

Synthesis, Spectroscopic and Electrochemical Studies of Mononuclear Fe(II) and Ni(II) Complexes Containing a Macrocyclic Ligand Derived from Pyridine-2,6-dicarboxaldehyde and 1,2-Bis(2-aminoethoxy) Ethane

Self-Assembly of an Imidazolate-Bridged Fe^III/Cu^II Heterometallic Cage

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The infrared spectra of coordinated perchlorates

Cited by 71 publications

References 19 publications

Synthesis and Characterization of a Thiocyanate Bridged Dinuclear Cu(II) Complex Containing Macrocyclic Ligand Derived from Pyridine-2, 6-dicarboxaldehyde and 1, 2-bis(2-aminoethoxy) Ethane

Synthesis and Characterization of a Thiocyanate Bridged Dinuclear Cu(II) Complex Containing Macrocyclic Ligand Derived from Pyridine-2, 6-dicarboxaldehyde and 1, 2-bis(2-aminoethoxy) Ethane

Synthesis, Spectroscopic and Electrochemical Studies of Mononuclear Fe(II) and Ni(II) Complexes Containing a Macrocyclic Ligand Derived from Pyridine-2,6-dicarboxaldehyde and 1,2-Bis(2-aminoethoxy) Ethane

Self-Assembly of an Imidazolate-Bridged FeIII/CuII Heterometallic Cage

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Self-Assembly of an Imidazolate-Bridged Fe^III/Cu^II Heterometallic Cage