Steric control of coordination: Unusual coordination mode of dimethylpyridine-2,6-dicarboxylate in a new dinuclear copper(II) complex [(dmpc)(Cl)( -Cl)Cu2( -Cl)(Cl)(dmpc)] and reversal of the coordination mode in [Cu(dmpc) (H2O)3] (ClO4)2

Kapoor, Pratibha; Pathak, Anuradha; Kaur, P.; Venugopalan, Paloth; Kapoor, R. C.

doi:10.1023/b:tmch.0000020351.16762.f2

Cited by 16 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2ii-b. As reported by Kapoor et al the negative shift with the splitting indicates the O-coordination of the carbonyl group to Dy(III) ion [7,18]. Coordination via the carbonyl oxygen atom is further confirmed by the medium intensity band observed at 416 cm À 1 which may be due to ν(Dy-O) [24], Fig.…”

Section: Infrared Spectroscopy Analysissupporting

confidence: 79%

“…In the FT-IR spectrum of the free dmpc, the sharp band observed at 1742 cm À 1 , which is attributed to the CQO stretching vibration mode of ester groups, Fig. 2ii-a, shifts to a lower frequency and splits into two sharp bands at 1699 cm À 1 and 1682 cm À 1 upon complexation with Dy(III) ion [7,23], Fig. 2ii-b.…”

Section: Infrared Spectroscopy Analysismentioning

confidence: 96%

“…(b) bichelate-β mode, via one carbonyl oxygen, one alkoxy oxygen and pyridine nitrogen atoms [6][7][8][9]; and (c) monochelate mode, via one carbonyl oxygen and pyridine nitrogen atoms [6,10]. In most cases, the bichelate-α coordination mode is more favorable in terms of steric and electronic factors.…”

Section: Introductionmentioning

confidence: 96%

“…On the contrary, a few studies were reported on the metal complexes of its ester especially dimethylpyridine-2,6-dicarboxylate (dmpc) [6][7][8][9][10][11][12][13]. As reported in the literature, the dmpc can coordinate to metal ions in three different coordination modes, Scheme 1; (a) bichelate-α mode, via two carbonyl oxygen and pyridine nitrogen atoms [6][7][8][9];…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Taha

Ajlouni

Hijazi

et al. 2015

Journal of Luminescence

View full text Add to dashboard Cite

Section: Infrared Spectroscopy Analysissupporting

confidence: 79%

Section: Infrared Spectroscopy Analysismentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Taha

Ajlouni

Hijazi

et al. 2015

Journal of Luminescence

View full text Add to dashboard Cite

“…A brief overview of low-molecular-weight organic compound complexes that contain coordinated ester groups was presented by Schreiner et al 20 Multidentate ligands containing esters and other functional groups have been recently attracting the attention of researchers because of their various coordination modes that are controlled by the subtle interplay between stereo-electronic factors. Attempts [21][22][23][24] at such studies also revealed the coordination behaviors involving both the carbonylic and the alkoxy atoms of esters with metal ions. Moreover, regarding ester-containing polymers, Rolker et al 25 observed that their viscosity was increased when they were treated with iron, cobalt or nickel carbonyl complexes at elevated temperatures in nitrogen.…”

Section: Introductionmentioning

confidence: 99%

A direct method for the vulcanization of acrylate rubber through in situ coordination crosslinking

Mou

Xue

Shi

et al. 2012

Polym J

View full text Add to dashboard Cite

In this work, a straightforward method of vulcanizing acrylate rubber (AR) was explored via the introduction of in situ coordination crosslinking. An inorganic metal salt, copper sulfate (CuSO 4 ), was mechanically mixed with AR and heat pressed to prepare a novel crosslinkable AR/CuSO 4 composite. The determination of the coordination bonding between the ester groups of AR and copper (II) ions was performed with Fourier transform infrared spectroscopy based on the red shifts of the ester group absorption bands and the disappearance of the coordinated sulfate absorption bands, as well as by electron spin resonance based on the changes in the g-factor of copper (II). The crosslinking procedure of the composite was investigated through dynamic mechanical analysis. In addition, the extent of the crosslinking of the AR/CuSO 4 composites was evaluated by observing the swelling behaviors. Scanning electron microscopy was used to investigate the morphology of the composite. The vulcanizates exhibited improved physical properties with high elongation at break due to exchange reaction between the ester groups of AR and Keywords: acrylate rubber; coordination; polymer composites; vulcanization INTRODUCTION Acrylate rubbers (AR) exhibit the favorable qualities of weatherability, high temperature serviceability and good oil resistance. These qualities make the rubbers useful for under-the-hood automotive applications and outdoor applications. However, because AR is a saturated rubber, it is impossible for it to be vulcanized through traditional sulfur-vulcanizing systems like unsaturated rubbers. A considerable amount of research has been accomplished in the past years to introduce various types of active cure-site monomers into AR chains during the polymerization process. The most common curesite monomers include those containing a labile halogen atom, a carboxyl group, an epoxide moiety, an unsaturated double bond, and a combination of two or more monomers resulting in dual or multiple cure sites, which require different curing systems as shown in Table 1. Despite significant advances in cure technology, all of the current acrylic elastomers require a relatively long cure cycle or must be post-cured.In this work, we aimed to develop a straightforward method to vulcanize AR by introducing coordination-bond crosslinking. Ester carbonyl is capable of coordinating with metal ions, especially in solution systems. Metal complexes with carboxylic esters as ligands have long been in practice. A brief overview of low-molecular-weight organic compound complexes that contain coordinated ester groups was presented by Schreiner et al. 20 Multidentate ligands containing esters and other functional groups have been recently attracting the

show abstract

Steric Control over Hydrogen Bonding in Crystalline Organic Solids: A Structural Study of N,N′‐Dialkylthioureas

Custelcean

Gorbunova

Bonnesen

2005

Chemistry A European J

View full text Add to dashboard Cite

Hydrogen bonding in crystalline N,N'-dialkylthioureas was examined with the help of single-crystal X-ray diffraction, DFT calculations, and Cambridge Structural Database (CSD) analysis. A CSD survey indicated that unlike the related urea derivatives, which persistently self-assemble into one-dimensional hydrogen-bonded chains, the analogous thioureas can form two different hydrogen-bonding motifs in the solid state: chains, structurally similar with those found in ureas, and dimers, that further associate into hydrogen-bonded layers. The formation of one motif or another can be manipulated by the bulkiness of the organic substituents on the thiourea group, which provides a clear example of steric control over the hydrogen bonding arrangement in crystalline organic solids.

show abstract

Steric control of coordination: Unusual coordination mode of dimethylpyridine-2,6-dicarboxylate in a new dinuclear copper(II) complex [(dmpc)(Cl)( -Cl)Cu₂( -Cl)(Cl)(dmpc)] and reversal of the coordination mode in [Cu(dmpc) (H₂O)₃] (ClO₄)₂

Cited by 16 publications

References 15 publications

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

A direct method for the vulcanization of acrylate rubber through in situ coordination crosslinking

Steric Control over Hydrogen Bonding in Crystalline Organic Solids: A Structural Study of N,N′‐Dialkylthioureas

Contact Info

Product

Resources

About