Molecular structure and magnetic properties of a novel Fe(III) tetranuclear complex containing oxo, alkoxo, and carbonato bridges

Jameson, Donald L.; Xie, Cheng; Hendrickson, David N.; Potenza, Joseph A.; Schugar, Harvey J.

doi:10.1021/ja00237a018

Cited by 140 publications

(33 citation statements)

References 2 publications

(3 reference statements)

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“…The mean plane of the CO 3 moiety is tilted with respect to the sixatoms Sn 3 O 3 mean plane (RMS deviation = 0.046 Å ) by 26.6(2)°, leading to a anti,anti conformation. Such a conformation is encountered in many solid-state structures of transition metal carbonate complexes, especially for iron [23], chromium [24], molyb-denum [25], vanadium [26], and copper [27].…”

Section: X-ray Structure and Spectroscopic Characterisation Of [Oc(osmentioning

confidence: 99%

Reactivity of ditert-butyldimethoxystannane with carbon dioxide and methanol: X-ray structure of the resulting complex

Ballivet‐Tkatchenko

Burgat

Chambrey

et al. 2006

Journal of Organometallic Chemistry

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Section: X-ray Structure and Spectroscopic Characterisation Of [Oc(osmentioning

confidence: 99%

Reactivity of ditert-butyldimethoxystannane with carbon dioxide and methanol: X-ray structure of the resulting complex

Ballivet‐Tkatchenko

Burgat

Chambrey

et al. 2006

Journal of Organometallic Chemistry

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“…These structural features are similar to other tetranuclear Fe(III) complexes reported in the literature. [44,45] The Fe(1)À Fe(2) and Fe(4)C-> Fe(3) distances for the (μ-alkoxo) bridged binuclear subunits are 3.67(9) and 3.73(3) Å, while the Fe(1)À Fe(3) and Fe(4)À Fe(2) distances of the bis(naphtholato)/(μ-hydroxo) subunits are 3.42(5) and 3.47(0) Å respectively. The Fe(1)À N(1), Fe(4)À N(4), Fe(3)À N(3), and Fe(2)À N(2) bond lengths are all slightly elongated with an average distance of 2.22(2) Å.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization and Spectroscopic Investigation of Novel Tetra‐Iron(III) Complexes and D‐Glucose under Redox Conditions

et al. 2021

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In order to investigate sugar-metal interactions, we synthesized and fully characterized three iron(III) complexes (K 4 [1]⋅25H 2 O⋅-(CH 3 ) 2 CO, K 2 [2]⋅CH 3 OH⋅4H 2 O and K 2 [3]⋅CH 3 OK⋅5CH 3 OH) bearing a dinucleating ligand H 5 ccdp (H 5 ccdp = N,N'-bis[2carboxybenzomethyl]-N,N'-bis[carboxymethyl]-1,3-diaminopropan-2-ol). Whereas K 4 [1]⋅25H 2 O⋅(CH 3 ) 2 CO was soluble in water, K 2 [2]⋅CH 3 OH⋅4H 2 O and K 2 [3]⋅CH 3 OK⋅5CH 3 OH were soluble only in methanol. In aqueous alkaline media, spectroscopic investigations revealed that K 4 [1]⋅25H 2 O⋅(CH 3 ) 2 CO undergoes coordination and redox activities toward D-glucose. No such activities were observed when the complexes were investigated with either Mannose, Xylose, methyl β-D-glucopyranoside or methyl α-D-glucopyranoside under the same experimental conditions. Similar investigations using K 2 [2]⋅CH 3 OH⋅4H 2 O and K 2 [3]-⋅CH 3 OK⋅5CH 3 OH complexes in methanol showed neither substrate binding nor redox activity. Synthesis, characterizations, results of substrate binding studies using spectroscopic techniques, redox activity and single-crystal X-ray diffraction are reported.

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“…Similar distances are known for O–H ··· O hydrogen‐bonding interactions. [15c,15d,15f–15h,17] It is interesting to note that the O(9) ··· O(11) distance is slightly longer than those observed for similar {O ··· H ··· O} 3– bridging units (2.394–2.426 Å)15a–15d but shorter than that reported for the rectangular {Fe III 4 (μ‐OH) 2 (μ‐OHO)} 7+ core supported by additional acetate bridges [2.525(9) Å]15g,15h and {Fe III 4 (μ‐RCO 2 ) 2 (μ‐OHO)} 7+ 15i. The μ‐oxido diiron(III) character in the Fe(1)–O(9)–Fe(2) and Fe(3)–O(11)–Fe(4) units is appreciably reduced as a result of an unsymmetrical protonation of the {O–H ··· O} 3– group.…”

Section: Resultsmentioning

confidence: 99%

“…[{Fe 2 (OR)(RCO 2 )} 2 (O) 2 ],16 or of the tetragonal type, e.g. [{Fe 2 (OR)(OCO 2 )} 2 (OHO)],15a [{Fe 2 (OR)(RCO 2 )} 2 (OHO)],15b–15e [{Fe 2 (OR)} 2 (RCO 2 )(OHO)],15e [{Fe 2 (OR)} 2 (OHO)],15e,15f [{Fe 2 (OH)(RCO 2 ) 2 } 2 (OHO)]15g,15h (OR – : alkoxido) and [{Fe 2 (OR′)(RCO 2 )} 2 (OHO)]15i (OR′ – : phenoxido) have been assembled by using (i) endogenous alkoxido/phenoxido bridging ligands with or without additional carboxylate bridges and (ii) carboxylate bridges.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of novel polyamides containing sulfone‐ether linkages and xanthene cardo groups

Sheng

Jiang

et al. 2010

Polymer International

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In order to obtain polyamides with enhanced solubility and processability, as well as good mechanical and thermal properties, several novel polyamides containing sulfone‐ether linkages and xanthene cardo groups based on a new diamine monomer, 9,9‐bis[4‐(4‐aminophenoxy)phenyl]xanthene (BAPX), were investigated. The BAPX monomer was synthesized via a two‐step process consisting of an aromatic nucleophilic substitution reaction of readily available 4‐chloronitrobenzene with 9,9‐bis(4‐hydroxyphenyl)xanthene in the presence of potassium carbonate in N,N‐dimethylformamide, followed by catalytic reduction with hydrazine and Pd/C. Four novel aromatic polyamides containing sulfone‐ether linkages and xanthene cardo groups with inherent viscosities between 0.98 and 1.22 dL g−1 were prepared by low‐temperature polycondensation of BAPX with 4,4′‐sulfonyldibenzoyl chloride, 4,4′‐[sulfonyl‐bis(4‐phenyleneoxy)]dibenzoyl chloride, 3,3′‐[sulfonyl‐bis(4‐phenyleneoxy)]dibenzoyl chloride and 4,4′‐[sulfonyl‐bis(2,6‐dimethyl‐1,4‐phenyleneoxy)]dibenzoyl chloride in N,N‐dimethylacetamide (DMAc) solution containing pyridine. All these new polyamides were amorphous and readily soluble in various polar solvents such as DMAc and N‐methylpyrrolidone. These polymers showed relatively high glass transition temperatures in the range 238–298 °C, almost no weight loss up to 450 °C in air or nitrogen atmosphere, decomposition temperatures at 10% weight loss ranging from 472 to 523 °C and 465 to 512 °C in nitrogen and air, respectively, and char yields at 800 °C in nitrogen higher than 50 wt%. Transparent, flexible and tough films of these polymers cast from DMAc solution exhibited tensile strengths ranging from 78 to 87 MPa, elongations at break from 9 to 13% and initial moduli from 1.7 to 2.2 GPa. Primary characterization of these novel polyamides shows that they might serve as new candidates for processable high‐performance polymeric materials. Copyright © 2010 Society of Chemical Industry

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Molecular structure and magnetic properties of a novel Fe(III) tetranuclear complex containing oxo, alkoxo, and carbonato bridges

Cited by 140 publications

References 2 publications

Reactivity of ditert-butyldimethoxystannane with carbon dioxide and methanol: X-ray structure of the resulting complex

Reactivity of ditert-butyldimethoxystannane with carbon dioxide and methanol: X-ray structure of the resulting complex

Synthesis, Characterization and Spectroscopic Investigation of Novel Tetra‐Iron(III) Complexes and D‐Glucose under Redox Conditions

Synthesis and properties of novel polyamides containing sulfone‐ether linkages and xanthene cardo groups

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